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Dissertations / Theses on the topic 'Trimethylene'

Author: Grafiati
Published: 4 June 2021
Last updated: 5 February 2022

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1

Zhang, Zheng. "Biodegradable block copolymers based on trimethylene carbonate, lactides, and poly(ethylene glycol)." Enschede : University of Twente [Host], 2006. http://doc.utwente.nl/51115.

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2

Kalakkunnath, Sumod. "VISCOELASTIC RELAXATION CHARACTERISTICS OF RUBBERY POLYMER NETWORKS AND ENGINEERING POLYESTERS." UKnowledge, 2007. http://uknowledge.uky.edu/gradschool_diss/486.

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The relaxation characteristics of rubbery poly(ethylene oxide) [PEO] networks have been investigated as a function of network composition and architecture via dynamic mechanical analysis and broadband dielectric spectroscopy. A series of model networks were prepared via UV photopolymerization using poly(ethylene glycol) diacrylate [PEGDA] as crosslinker: variations in crosslink density were achieved either by the introduction of water in the prepolymerization reaction mixture, or by the inclusion of mono-functional acrylate such as poly(ethylene glycol) methyl ether acrylate [PEGMEA] or poly(e
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3

Choi, Wonsook. "Mechanistic studies of the metal catalyzed formation of polycarbonates and their thermoplastic elastomers." [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-1433.

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4

Barouti, Ghislaine. "New poly(hydroxyalkanoate)-based copolymers : from synthesis to tunable self-assembled systems." Thesis, Rennes 1, 2016. http://www.theses.fr/2016REN1S064/document.

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Les copolymères à blocs amphiphiles s’auto-assemblent en solution aqueuse grâce à l’association de leurs segments hydrophobes. Les nanoparticules formées à partir de copolymères biocompatibles et biodégradables tels que les poly(hydroxyalkanoates) (PHAs) sont particulièrement attractives pour la conception de systèmes à libération prolongée de principes actifs. La relation entre la composition/structure chimique du copolymère, ses propriétés d’auto-assemblage et ses effets sur les cellules in-vitro doit être étudiée. Des copolymères à blocs poly(acide malique)-b-poly(3-hydroxybutyrate) (PMLA-b
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5

Yang, Jian. "Etude de la synthèse et des structure-propriétés de copolyester-carbonates biorésorbables." Thesis, Montpellier 1, 2010. http://www.theses.fr/2010MON13506/document.

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Une série d'homopolymères tels que poly(L-lactide) (PLLA), poly(triméthylène carbonate) (PTMC), poly (e-caprolactone) (PCL) et les copolymers ont été synthétisés par polymérisation par ouverture de cycles de monomère appropriés en utilisant du zinc lactate ou octanoate d'étain comme catalyseur. Leurs propriétés thermiques, dégradation hydrolytique, dégradation enzymatique, propriétés mécaniques et comportement à mémoire de forme ont été étudiées à l'aide de DSC, RMN, SEC, ESEM, DMA et machine à traction Instron. Les copolymères de triméthylène carbonate et DL-lactide (PTDLA) peuvent être dégra
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6

Braghirolli, Daikelly Iglesias. "Desenvolvimento de um substituto nanoestruturado a ser utilizado em associação com células-tronco para a terapia vascular em doença arterial periférica." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2017. http://hdl.handle.net/10183/169724.

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Atualmente, existe uma grande necessidade médica por enxertos vasculares de pequeno calibre (< 6 mm), que possam ser utilizados em cirurgias de reconstrução vascular. Nesse trabalho, dois tipos de biomateriais vasculares foram desenvolvidos pela técnica de electrospinning: biomateriais de policaprolactona (PCL) e biomateriais de poli(carbonato de trimetileno – co – ácido lático) (PTMCLLA). Os biomateriais de PCL foram funcionalizados com heparina e com VEGF (PCL/Hep/VEGF). Os biomateriais de PTMCLLA foram desenvolvidos a partir de três razões de carbonato de trimetileno/ ácido lático: 20/80, 3
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7

Samuel, Cédric. "Apport de la farine de maïs plastifiée dans les mélanges à matrice polyester pour des applications films." Thesis, Saint-Etienne, 2011. http://www.theses.fr/2011STET4019/document.

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Ces travaux menés à l’IMP@UJM ont pour objectifs la réalisation de films minces alimentaires 100% compostables par extrusion gonflage, thermoformage et biétirage. Des mélanges à base de farine plastifiée et de polyesters compostables ont été étudiés. La farine peut être déstructurée par extrusion bivis en présence de glycérol de manière similaire à l’amidon. La farine thermoplastique, ainsi obtenue, présente toutefois des différences notables avec l’amidon mais ne répond toujours pas aux applications visées. Son mélange avec des matrices polyester (PBAT et PLA) dans un procédé d’extrusion bivi
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8

Källrot, Martina. "Single-Step Covalent Functionalization of Polylactide Surfaces." Licentiate thesis, KTH, Fibre and Polymer Technology, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-579.

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<p>Degradable polymers have gained an increased attention in the field of biomedical applications over the past decades, for example in tissue engineering. One way of improving the biocompatibility of these polymers is by chemical surface modification, however the risk of degradation during the modification procedure is a limiting factor. In some biomedical applications, for example in nerve guides, a patterned surface is desired to improve the cell attachment and proliferation.</p><p>In this thesis a new non-destructive, single-step, and solvent free method for surface modification of degrada
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9

Källrot, Martina. "Covalent Surface Modification of Degradable Polymers for Increased Biocompatibility." Licentiate thesis, KTH, Fiber- och polymerteknik, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-579.

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Degradable polymers have gained an increased attention in the field of biomedical applications over the past decades, for example in tissue engineering. One way of improving the biocompatibility of these polymers is by chemical surface modification, however the risk of degradation during the modification procedure is a limiting factor. In some biomedical applications, for example in nerve guides, a patterned surface is desired to improve the cell attachment and proliferation. In this thesis a new non-destructive, single-step, and solvent free method for surface modification of degradable polym
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10

董佳欣. "Crystallization Behaviors of Poly(ethylene/trimethylene terephthalate) and Poly(trimethylene terephthalate/isophthalate) Random Copolyesters." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/ywff24.

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博士<br>逢甲大學<br>纖維與複合材料學系<br>102<br>The comformational changes, crystal structure, morphological structure, secondary nucleation kinetic, and crystallization kinetic of poly(ethylene/trimethylene terephthalate) (ET) random copolyesters were investigated. The results were compared with the crystallization behavior of poly(trimethylene terephthalate/isophthalate) (TI) random copolyesters. The melt- and cold-crystallization behaviors of both random copolyesters were studied as well. The crystal structure, crystallization morphology, and melting behavior of isothermal melt-crystallized ET copolyeste
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11

Tu, Chin-ying, and 塗瑾穎. "Photodissociation Dynamics of 1,3-Trimethylene Oxide." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/81929485859356772999.

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碩士<br>國立清華大學<br>化學系<br>89<br>Photodissociation of 1,3-trimethylene oxide at 157 nm have been investigated using photofragment translational spectroscopy (PTS) technique. This experiment has been done by used newly built crossed molecular beam apparatus in the end station of U9 white light beamline at Synchrotron Radiation Research Center. At 157 nm excitation, the experimental results show that it only has one main channel : The translation energy distribution for this channel is broad and the cutoff is at 160 kcal / mol. By tuning the photon energy, we can check the cracking patt
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12

Huang, Tze-Wei, and 黃自維. "Equilibrium melting temperature of poly (trimethylene terephthalate)." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/26686026839708647485.

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碩士<br>國立中山大學<br>材料科學研究所<br>90<br>Differential scanning calorimeter (DSC) and temperature modulated differential scanning calorimeter (TMDSC) were used to study the isothermal crystallization kinetics and the melting behaviors at heating rates of 2, 10, 50, and 80 □C/min for the poly(trimethylene terephthalate), PTT, with sample codes of PTT-1, PTT-2, PTT-4, and PTT-6, respectively. The results of Avrami analysis yielded two exponents, n1 and n2. The n1 values of both PTT-4 and PTT-6 samples increased from 2.1 to 3.0 with an increasing Tc (the isothermal crystallization temperature). It suggest
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13

TING, MING HUANG, and 丁銘煌. "Study of Poly(trimethylene terephthalate)/Polycarbonate Blends." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/16451702520955739545.

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碩士<br>長庚大學<br>化工與材料工程研究所<br>91<br>Abstract Poly(trimethylene terephthalate) (PTT) and polycarbonate (PC) blends were prepared in the Laboratory Mixing Molder (LMM) at 280℃. The samples with different compositions were blended for 5, 10, 15 and 20 minutes, respectively, with a rotor rotation rate of 180 rpm. According to the blending condition, the effects of sample composition and blending time on the miscibility and thermal properties of the blends were investigated. The differential scanning calorimeter (DSC) results showed that the original two glass transition temperatures (Tg，s
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14

Chuang, Wei-Tsung, and 莊偉綜. "Crystallization and Melting Behaviors of Poly(trimethylene terephalate)." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/6h7y4p.

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碩士<br>國立臺灣科技大學<br>纖維及高分子工程研究所<br>88<br>In the study, the crystallization and melting behaviors of polytrimethylene terephthalate (PTT) were investigated. Firstly, the crystallization kinetics was analyzed using the Avrami theory. Crystallization of PTT was carried out at isothermal crystallization temperatures from 438 to 488 K. The Avrami exponent n value varied from 2 to 3, indicating that the crystallization mechanism depends much on the crystallization temperature to exhibit various growth and nucleation processes. Then, the result in the secondary nucleation analyses shows a regime Ⅱ → re
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15

Chen, Chao Chun, and 陳朝群. "Analysis of kinetic crystallization of poly(trimethylene terephalate)." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/76817291024553666057.

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16

Jheng, Jian-Bang, and 鄭建邦. "The Conformational Changes of Poly(trimethylene terephthalate) during Crystallization." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/8dvjfj.

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碩士<br>國立臺灣科技大學<br>材料科學與工程系<br>99<br>The conformational changes and aggregation of poly(trimethylene terephthalate) (PTT) polymer chains during isothermal cold-crystallization process have been investigated by using time-resolved FTIR. From the curve-fitting method, we assimilated the information about the integral intensity, full width at the half-width and band shape from several IR bands, and quantitatively analyzed these data. For PTT cold-crystallization process, we found that the amorphous phase transformed to the pre-order structure (mesomorphic phase) first and there was about 28.8% exo
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17

Chen, Chih-hua, and 陳志輝. "Crystallization and Melting Behavior of Poly(trimethylene 2,6- naphthalate)." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/27465514377548872494.

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碩士<br>國立臺灣科技大學<br>高分子系<br>94<br>In this paper, the temperature-induced Poly(trimethylene 2,6-naphthalate), PTN, polymorphism and the polymorphic transitions have been studied by simultaneous wide-angle X-ray scattering (WAXS), small-angle X-ray scattering (SAXS), and differential scanning calormetry (DSC). It has been found that the isothermal crystallization leads to the formation of PTN polymorphic crystals, simply by changing the crystallization temperature. The PTN α-form crystal, β-form, and the mixture of two crystal forms grow at the crystallization temperatures below 120 °C, above 180
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18

Lee, Huan-Yi, and 李奐儀. "Study of Poly(trimethylene terephthalate)/Poly(hexamethylene isophthalamide) Blends." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/08363695303152278336.

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碩士<br>長庚大學<br>化工與材料工程研究所<br>91<br>In this study, the poly(trimethylene terephthalate) (PTT)/ poly(hexamethylene isophthalamide) (PA 6I) blends were investigated through differential scanning calorimeter (DSC), polarized optical microscope (POM), wide angle x-ray diffractometer (WAXD), thermogravimetric analyzer (TGA), and scanning electron microscope (SEM). The DSC results showed that two distinct glass transition temperatures (Tg's) existed in the blends. The SEM and POM results indicated the blends exhibited two morphological features, which depended on the composition. According to these
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19

Ka, kae-Zen, and 柯凱仁. "Crystal Structure and Morphology Studies of Poly(trimethylene terephthalate)." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/83549402839821018276.

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20

Wu, Hsuan-Hua, and 吳泫樺. "Morphologies and characterization of electrospun poly(trimethylene terephthalate)/graphene nanofiber." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/se2z8p.

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21

Jheng, Jian-Bang, and 鄭建邦. "Far-From-Equilibrium Structural Formation of Poly(trimethylene terephthalate) Melts." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/09942559260875318925.

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博士<br>國立臺灣科技大學<br>材料科學與工程系<br>104<br>Understanding the formation mechanism of pre-ordering structures in the induction period of crystallization is one of the long-standing issues in polymer physics. In the first section, the structural characteristic of the diffuse interface implied from the kinetic scaling of growing nuclei (n=1/4), the gradually density increasing in the crystal nuclei, and the rough half-interface thickness (~10 nm) of crystal-amorphous boundary revealed by time-resolved WAXS/SAXS supports the non-CNT (classical nucleation theory) nucleation behavior of poly(trimethylene t
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22

Chuang, Wei-Tsung, and 莊偉綜. "Effect of Crystallization Mechanism on Structural Formation of Poly(trimethylene terephthalate)." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/58647818830371314642.

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博士<br>國立臺灣科技大學<br>高分子工程系<br>92<br>This thesis is major discussed with crystallization behavior in poly(trimethylene terephthalate) (PTT). The isothermal crystallization kinetics of PTT was first investigated from two temperature limits of melt and glass states. For the isothermal melt crystallization, the values of Avrami exponent varied between 2 to 3 with changing crystallization temperature, indicating the mixed growth and nucleation mechanisms. Meanwhile, the cold crystallization with an Avrami exponent of 5 indicated a character of three-dimensional solid sheaf growth with athermal nuclea
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23

Yao-Jen, Chiang, and 江耀仁. "Crystallization Kinetics and MorphologyTerephthalate Acid and Ethylene Glycol/ trimethylene glycol Copolymer." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/92774259367043682221.

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碩士<br>逢甲大學<br>紡織工程學系<br>87<br>The work was focused on the crystallization and melting of terephthalate acid/ethylene glycol/trimethylene glycol copolymer and its morphology. The molar volume ratio of terephthalate acid/ethylene glycol/trimethylene glycol copolymers were 50/50/0, 50/48/2, 50/46/4, 50/44/6, and 50/42/8, respectively. A differential scanning calorimeter, hot stage polarized microscope, and scanning electron microscope were used in this study. The results show that an increase of cooling rate results in a decrease of crystallization temperature, which has the consequenc
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24

Wan, Lai-Hung, and 溫禮鴻. "Miscibility and crystallization of Poly(Trimethylene Terephthalate) and Poly(propylene) blends." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/66m5sd.

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碩士<br>國立臺北科技大學<br>有機高分子研究所<br>93<br>The crystallization behavior, glass transition temperature, morphology and miscibility of poly(trimethylene terephthalate)/poly(propylene) blends was investigated using differential scanning calorimetry(DSC), dynamic mechanical analyzer(DMA), polarized-light microscopy(POM), X-ray diffraction(XRD), and Thermal Gravimetric Analysis(TGA). Glass transition temperature of PTT obtained form DMA did not change much with the increase of PP component . Under POM, we found that PP/PTT blends with PTT less than 14% is miscible, but immisible for other component. The d
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25

Wang, Yen-Po, and 王彥博. "Crystallization in Blend of Liquid Crystalline Copolyester and Poly(trimethylene terephthalate)." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/41211420627795911496.

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碩士<br>國立交通大學<br>材料科學與工程系<br>90<br>The miscibility and the crystallization kinetics in blends of random liquid crystalline copoly(oxybenzoate -ethylene terephthalate) at molar ratio 60/40 (P64) and semicrystalline poly(trimethylene terephthalate) (PTT) were investigated with differential scanning calorimetry, wide angle X-ray diffraction and polarized optical micrography. It was found that P64 and PTT were partially miscible as evidenced from the appearance of molecular interaction force close to middle in amorphous region. Furthermore, the Flory-Huggins interaction parameter, 12, for P64 an
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26

Tsai, Chia-jung, and 蔡嘉榮. "Studies of poly(ethylene succinate) and its copolyesters with poly(trimethylene succinate)." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/uwm5nq.

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博士<br>國立中山大學<br>材料與光電科學學系研究所<br>97<br>Poly(ethylene succinate) (PES), poly(trimethylene succinate) (PTS) and their copolyesters with various compositions were synthesized through a direct polycondensation reaction with titanium tetraisopropoxide used as the catalyst. Results obtained from intrinsic viscosity and gel permeation chromatography (GPC) studies have significantly contributed to the preparation of polyesters with high molecular weight. Compositions and sequence distributions of the synthesized copolyesters were determined by analyzing the spectra of 1H NMR and 13C NMR. According to t
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Chang, Meng-Ling, and 張夢玲. "The Effect of Minor Amount Fillers on Crystallization of Poly(trimethylene terephthalate)." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/66302630014426427130.

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碩士<br>長庚大學<br>化工與材料工程研究所<br>91<br>In this study, the newly commercialized poly(trimethylene terephthalate) (PTT) was incorporated with different inorganic fillers by melt-mixed process. The effect of various inorganic fillers on the crystallization behavior of PTT was thus investigated through differential scanning calorimeter (DSC) and polarized optical microscope (POM). It was found that among the inorganic fillers tried the barium sulfate (BaSO4) was the most effective nucleating agent for PTT. For example, the result of non-isothermal crystallization analysis showed that the a
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28

Wang, Hui-Chen, and 王惠貞. "Sequence Distribution, Crystallization and Melting Behaviors of Poly[(ethylene)-co-(trimethylene terephthalate)]s." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/88518128173602022503.

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碩士<br>國立中山大學<br>材料科學研究所<br>90<br>The compositions of a series of poly (ethylene/trimethylene terephthalate) copolyesters were identified by 1H-NMR and 13C-NMR. The ethylene terephthalate (ET) units are 8.9, 33.7, 37.9, 50.1, 72.5, 77.8, and 90.8% in the copolyesters with sample codes of C2, C3, C4, C5, C6, C7, and C8, respectively. The triad sequence probabilities were determined from the normalized areas of aromatic quaternary carbons. The calculated average-number sequence lengths of ethylene- and trimethylene- terephthalate units range from 1.0 to 10.2 that depends on the relative ratio of
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29

Liao, Chian-Tang, and 廖建棠. "The Compatibilizers Effects on the Thermal and Mechanical Properties of Poly(trimethylene terephthalate)/." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/93222532680482914376.

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碩士<br>長庚大學<br>化工與材料工程研究所<br>92<br>The aim of this study was to investigate the effects of adding epoxy oligomer (as compatibilizers) on the thermal and mechanical properties of poly(trimethylene terephthalate) (PTT)/ poly(hexamethylene isophthalamide) (PA 6I) blends. The blends were prepared through an internal mixer (Haake Polydrive), differential scanning calorimeter (DSC), wide angle x-ray diffractometer (WAXD), scanning electron microscope (SEM), polarized optical microscope (POM) and dynamic mechanical analyzer (DMA) were employed for the properties measurements. The epoxy denoted 4221 wa
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Wen, Chia-Kuen, and 溫家坤. "Miscibility and Crystallization of Poly(Trimethylene Terephthalate) and Poly(L-lactic acid) Blends." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/y5pgb9.

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碩士<br>國立臺北科技大學<br>有機高分子研究所<br>95<br>In this study, organic environmental polymer (PLLA ) and new-type textile polymer (PTT ) were studied. PLLA was the continuous phase and PTT was the dispersed phase. 10~50%(wt%) PTT was added to PLA solution. The crystallization behavior, glass transition temperature, morphology and miscibility of poly(L-lactic acid)/ Poly(Trimethylene Terephthalate) blends were investigated using differential scanning calorimetry(DSC), dynamic mechanical analyzer(DMA), polarized-light microscopy(POM), thermal gravimetric analysis(TGA), and scanning electron microscopy(SEM).
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Li, Wen-Jen, and 李文仁. "Synthesis and Characterization of Poly(trimethylene terephthalate) Nanocomposites Incorporating Multi-Walled Carbon Nanotubes." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/54602841303567372520.

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碩士<br>高苑科技大學<br>化工與生化工程研究所<br>97<br>Poly(trimethylene terephthalate) (PTT) nanocomposites containing multi-walled carbon nanotubes (MWNT) were prepared using a melt-blending process. Acrylic acid-grafted PTT (PTT-g-AA) and multi hydroxyl-functionalized MWNT (MWNT-OH) were used to improve the compatibility and dispersibility of MWNT within the PTT matrix. The nanocomposites were characterized morphologically by transmission electron microscopy and chemically using Fourier transform infrared absorbance, 1H solid-state nuclear magnetic resonance, and ultraviolet-visible spectroscopy. The thermal
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32

HSUEH, YU-LUN, and 薛又綸. "Crystallization and Properties of Poly(ethylene 2,6-naphthalate)/Poly(trimethylene terephthalate) (PEN/PTT) Blends." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/15933465864087070960.

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碩士<br>國立臺北科技大學<br>有機高分子研究所<br>91<br>The crystallization behavior of Poly(ethylene 2,6-naphthalate)/Poly(trimethylene terephthalate) (PEN/PTT) blends were investigated by different scanning calorimetry（DSC）, dynamic mechanical analysis（DMA）and universal tensile testing machine. In this work, the isothermal crystallization kinetics of PEN/PTT blends was analyzed from 220℃to 240℃using Avrami equation at various compositions. The equilibrium melting point was obtained using the Hoffman-Weeks method. The results of DMA show that PEN/PTT blends are immiscible. Nevertheless, small amount of PTT can i
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33

Hung, Lu Ping, and 呂秉紘. "Effect of Molecular Structure Modification on the Thermal Properties of Poly（trimethylene terephthalate）（PTT）." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/93173479565767708413.

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34

Tung, Yen-Tien, and 董彥佃. "Atomistic Molecular Dynamics Simulations for the Morphology and Property Relationship ofPoly (Trimethylene Terephthalate) fibers." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/15261091822701459771.

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碩士<br>國立臺灣大學<br>化學工程學研究所<br>94<br>We performed a series of atomistic molecular dynamics simulations to study the relation between the properties and the conformation of poly (trimethylene terephthalate), PTT. In the first part of this work, we investigate the dependence of properties on the degree of polymerization (DP) and number of PTT molecules in the system. We find that there is an apparent change of such dependences in both structure (end-to end distance, aspect ratio) and energetic properties as the DP of PTT is greater than 54. This indicates that simulation models with DP equal to or
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35

Hong, Cong-Gi, та 洪琮棋. "Crystallization and Miscibility of poly(Trimethylene Terephthalate) and poly(ε-caprolactone) by melt blending". Thesis, 2005. http://ndltd.ncl.edu.tw/handle/am24x4.

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碩士<br>國立臺北科技大學<br>有機高分子研究所<br>93<br>Miscibility and morphology of poly(trimethylene terephthalate) (PTT)/ poly(ε-caprolactone) (PCL) blend were investigated by differential scanning calorimeter (DSC) , polarized-light microscopy (POM) , scanning electron microscopy (SEM) and wide-angle X-ray diffraction(WAXD) . Two distinct glass transition temperatures (Tg) could be observed by of DSC . The upper Tg around 45℃ , was close to that of neat PTT , and the lower Tg around -65℃ , was close to that of neat PCL . The POM and SEM results indicated two separate morphology . According to these results
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Chang, Chih-wei, and 張芷維. "Heat of Fusion, Isothermal Crystallization Kinetics and Morphology of Poly(ethylene-co-trimethylene terephthalate) Copolyesters." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/99679689613996065742.

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碩士<br>國立中山大學<br>材料科學研究所<br>92<br>The crystallization kinetics and the melting behavior of a random copolyester with equal amounts of ethylene- and trimethylene- terephthalate units were studied by using a modulated differential scanning calorimeter in both conventional mode (DSC) and modulated mode (TMDSC). Polarizing light microscope (PLM) was used to study the spherulite growth rates and spherulite patterns. Isothermal crystallization was performed at temperatures (TC) between 115 and 142℃. The Avrami exponents, n1, were found to increase from 3.00 to 3.22 with an increasing TC. At the highe
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37

Hsieh, Min-Kang, and 謝旻剛. "Early State Crystallization Process of Poly (Trimethylene Terephthalate) (PTT) Polymer from Atomistic Molecular Dynamics Simulations." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/64605588640193205711.

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碩士<br>國立臺灣大學<br>化學工程學研究所<br>96<br>Atomistic molecular dynamics simulations are performed to study the initial crystallization process of poly(trimethylene terephthalate) (PTT). The structure development of ordering structures (nuclei precursors) in the isothermal and stress-induced crystallization process has been observed in our simulations. The formation of nucleus precursors is found to be driven mainly by the torsional and van der Waals forces. The thermal properties, such as the glass transition temperature (Tg) and the melting temperature (Tm), determined from our simulation are in good
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38

Hsieh, Min-Kang. "Early State Crystallization Process of Poly (Trimethylene Terephthalate) (PTT) Polymer from Atomistic Molecular Dynamics Simulations." 2008. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0001-2907200814251200.

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39

Liu, Bing-Chen, and 劉秉塵. "Crystallization kinetics, Morphology and Miscibility of Poly(L-lactic acid) and Poly(Trimethylene Terephthalate) Blends." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/223t66.

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碩士<br>國立臺北科技大學<br>有機高分子研究所<br>96<br>In this work, the isothermal and nonisothermal crystallization behavior of Poly(L-lactic acid)(PLA) and Poly(Trimethylene Terephthalate)(PTT) blends were investigated with differential scanning calorimetry(DSC). The results suggested that the binary blends showed different crystallization and melting behaviors with their different composition of PLA and PTT. In isothermal crystal, the Avrami equation was applied to describe the kinetics of the crystallization in the range temperature 190~200℃. The values of the Avrami exponent, n, was less than 2.5 . Hoffman
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40

Chang, Wei-che, and 張維哲. "Characterization, Crystallization, Melting and Morphology of Poly(ethylene succinate), Poly(trimethylene succinate) and their Copolyesters." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/59160951118893821933.

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碩士<br>國立中山大學<br>材料科學研究所<br>94<br>Poly(ethylene succinate) (PES), poly(trimethylene succinate) (PTS) and their copolyesters (PETSAs) with various compositions were used to investigate the structure-property relationship. The results of intrinsic viscosity and GPC have proven successful in preparing high molecular weight polyesters. The chemical compositions and the sequence distribution of co-monomers in the copolyesters were determined by NMR spectroscope. The distributions of ES unit and TS unit were found to be random. Their thermal properties were characterized using differential scanning c
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Wang, Chuan-Liang, and 王傳樑. "Heat of Fusion, Crystallization Kinetics Analyses and Morphology of Poly[(ethylene)-co-(trimethylene terephthalate)]s." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/35562037169547062975.

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碩士<br>國立中山大學<br>材料科學研究所<br>91<br>These developmental grade samples were supplied by the Union Chemical Laboratories of Industrial Technology Research Institute(ITRI). The compositions of a series of copolyesters were identified by C1-NMR and H1-NMR. The ethylene terephthalate(ET) units are 8.9、33.7、37.9% and trimethylene terephthalate(PT) units are 91.1、66.3、62.1% in the copolyesters with sample codes of C2、C3、C4. Differential scanning calorimeter(DSC) was used to study the isothermal crystallization kinetics and melting behaviors and Polarizing Microscope(PLM) was used to study the spherulit
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42

Tung, Chia-Hsin, and 董佳欣. "Structures of Poly(ethylene/trimethylene terephthalate) and Poly(ethylene/butylene terephthalate) Copolyesters Under Isothermal Crystallization Conditions." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/14269927851373312210.

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碩士<br>逢甲大學<br>紡織工程所<br>95<br>This study focused on the crystal structure, morphology and melting behaviors of a series of copolyesters, which were synthesized using dimethyl terephthalate / ethylene glycol / 1,3-propanediol and dimethyl terephthalate / ethylene glycol / 1,4-butanediol with varying copolymerization ratios. The isothermal crystallization structure and crystallinity was studied using a wide angle x-ray diffractometer (WAXD). The morphological structure was probed using a small angle x-ray scattering (SAXS). Melting enthalpy and melting point temperature were measured using a diff
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LEE, TUNG-CHENG, and 李東振. "Effect of Melt Blending on Crystallization Properties of Poly(ethylene2,6-naphthalate)/Poly(trimethylene terephthalate)(PEN/PTT)." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/94143709369888543563.

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碩士<br>國立臺北科技大學<br>有機高分子研究所<br>92<br>Glass transition temperature, crystallization behavior and morphology of Poly(ethylene 2, 6-naphthalate) (PEN)/ Poly(trimethylene terephthalate) (PTT) blends of different thermal history, were investigated by using dynamic mechanical analyzer(DMA), differential scanning calorimetry(DSC), polarized-light microscopy (POM), X-ray diffraction (XRD), and Nano-indenter. From the observation of thermal analysis, it was found that PEN/PTT were partially miscible after heating for a period of time as evidenced from the appearance of a single glass transition temperat
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44

Kang, Wei-Shian, and 康緯賢. "Study on the Preparation of poly(trimethylene terephthalate)/carbon nanotube composite by the sol-gel method." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/58529749347274910135.

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碩士<br>高苑科技大學<br>化工與生化工程研究所<br>100<br>To enhance the mechanical and thermal properties of poly(trimethylene terephthalate) (PTT), the purpose of thisthesis focused on the preapaation and characterization of composite composed of PTT and silica-multi-walled carbon nanotubes (SiO2-MWCNTs-OH), by the sol-gel method . The PTT polymer was chemically modified by maleic anhydride (MA) to increase the compatibility between PTT-g-MA and SiO2-MWCNTs-OH by the ester fomation between the anhydride carboxyl groups of PTT-g-MA and hydroxyl groups inSiO2-MWCNTs-OH. All the results were based on the characteri
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Peng, Jyun-siang, and 彭竣翔. "Copolymers and Blends of Poly(butylene succinate) and Poly(trimethylene succinate): Characterization, Crystallization, Melting, and Morphology." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/j7vtd8.

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碩士<br>國立中山大學<br>材料科學研究所<br>95<br>A small amount of poly(trimethylene succinate) (PTSu) were copolymerized or blended with poly(butylenes succinate) (PBSu) in this study. The range of intrinsic viscosity for PBSu and PBSu-enriched copolymers are between 1.62 and 0.97 dL/g; number-average molecular weights are in the range of 2.5x104 and 11.9x104 g/mol with polydispersity indices ranging from 1.52 to 3.94. Copolymer composition is calculated from 1H and 13C NMR spectra, and the distribution of BS and TS units in these copolymers are supported to be random from the evidence of a single glass tran
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46

Mei-Cang, Shen, and 沈美芳. "The study of crystallization properties of poly(trimethylene terephthalate) polymer and mechanical properties of as-spun fibre." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/72265515254711329854.

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47

Tsai, Hung Kuo, and 蔡宏國. "The Effect of Adding Organoclay on the Physical Properties of Poly(trimethylene terephthalate)/ Poly(hexamethylene isophthalamide) Blends." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/42940242431227688994.

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碩士<br>長庚大學<br>化工與材料工程研究所<br>96<br>Abstract In this study, PTT/PA 6I blends and PTT/PA 6I/clay (nano)composites were prepared by melt-mixed technique. Wide angle x-ray diffractometer (WAXD), differential scanning calorimeter (DSC), thermogravimetric analyzer (TGA), scanning electron microscope (SEM)/energy dispersive spectrometer (EDS), polarized light microscope (PLM), and transmission electron microscope (TEM) were used to characterize the dispersibility of clay in the composites, crystallization behavior, melt behavior, thermal stability, crystal structure, and morphology of the blends/co
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Tsai, Chang Shu, and 蔡長書. "Preparation and Characterization of 4,8-diaza-3,9-dimethyl -6,6-(trimethylene)undecane-2,10-dione bisoximate Oxotechne- tium(V)." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/69393209345843093486.

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49

Moncada, Adriana I. "Metal Catalyzed Formation of Aliphatic Polycarbonates Involving Oxetanes and Carbon Dioxide as Monomers." Thesis, 2010. http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-7812.

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Biodegradable aliphatic polycarbonates are important components of non-toxic thermoplastic elastomers, which have a variety of medical applications. Industrially, aliphatic polycarbonates derived from six-membered cyclic carbonates such as trimethylene carbonate (TMC or 1,3-dioxan-2-one) are produced via ring-opening polymerization (ROP) processes in the presence of a tin catalyst. It is worth mentioning that TMC is readily obtained by transesterification of 1,3-propanediol with various reagents including phosgene and its derivatives. Therefore, it has been of great interest to investigate gre
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Ko, Chi-Yun, and 柯季昀. "Non-isothermal Crystallization Kinetics, Multiple Melting Behaviors and Crystal Structure Simulation of Poly[(ethylene)-co-(trimethylene terephthalate)]s." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/41665322217796796907.

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碩士<br>國立中山大學<br>材料科學研究所<br>91<br>Non-isothermal crystallization of the PET/PTT copolyesters was studied at five different cooling rates over 1-20oC/min by means of differential scanning calorimetry (DSC). Both the Ozawa equation and the modified Avrami equation have been used to analyze the crystallization kinetics. The non-isothermal kinetics of most copolymers cannot be described by the Ozawa analysis, except the copolyester with a composition of 66.3% trimethylene- (TT) and 33.7 %ethylene- terephthalates (ET). It may be due to the inaccuracy of the Ozawa assumptions, such as the secondary c
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