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Journal articles on the topic 'Spherulitic growth rate of cyclic polymer'

Author: Grafiati

Published: 4 June 2021

Last updated: 4 February 2022

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1

Zhang, Yaqiong, Zhongkai Wang, Feng Jiang, Jing Bai, and Zhigang Wang. "Effect of miscibility on spherulitic growth rate for double-layer polymer films." Soft Matter 9, no. 24 (2013): 5771. http://dx.doi.org/10.1039/c3sm50542a.

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2

Ikehara, Takayuki, Hideo Kurihara, Zhaobin Qiu, and Toshio Nishi. "Study of Spherulitic Structures by Analyzing the Spherulitic Growth Rate of the Other Component in Binary Crystalline Polymer Blends." Macromolecules 40, no. 24 (2007): 8726–30. http://dx.doi.org/10.1021/ma070973k.

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3

KITAHARA, Tsunaki, Shinichi YAMAZAKI, and Kunio KIMURA. "Effects of Topological Constraint and Knot Entanglement on the Crystal Growth of Polymers Proved by Growth Rate of Spherulite of Cyclic Polyethylene." KOBUNSHI RONBUNSHU 68, no. 10 (2011): 694–701. http://dx.doi.org/10.1295/koron.68.694.

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4

Ono, Ryogo, Hironori Atarashi, Shinichi Yamazaki та Kunio Kimura. "Molecular weight dependence of the growth rate of spherulite of cyclic poly(ε-caprolactone) polymerized by ring expansion reaction". Polymer 194 (квітень 2020): 122403. http://dx.doi.org/10.1016/j.polymer.2020.122403.

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5

Shinya, Atsushi, Ryogo Ono, Hironori Atarashi, Shinichi Yamazaki та Kunio Kimura. "Morphology and growth rate of spherulite of cyclic poly(ε-caprolactone) having a triazole group at the closing point". Polymer 202 (серпень 2020): 122660. http://dx.doi.org/10.1016/j.polymer.2020.122660.

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6

Chen, Shouyu, Yaqiong Zhang, Huagao Fang, Yunsheng Ding, and Zhigang Wang. "Can spherulitic growth rate accelerate before impingement for a semicrystalline polymer during the isothermal crystallization process?" CrystEngComm 15, no. 27 (2013): 5464. http://dx.doi.org/10.1039/c3ce40421h.

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7

Lu, Jun, Il Kwon Oh, Rui Huang, and Xuan Lun Wang. "Spherulitic Structures in Bisphenol-A Polycarbonate Crystallized at High Pressure." Advanced Materials Research 26-28 (October 2007): 1275–78. http://dx.doi.org/10.4028/www.scientific.net/amr.26-28.1275.

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The high-pressure crystallized bisphenol-A polycarbonate (BAPC) and BAPC / dioctyl phthalate (DOP) blend samples were investigated using wide-angle X-ray diffraction (WAXD), differential scanning calorimetry (DSC) and scanning electron microscopy (SEM). The results showed that the rate of the crystallization of BAPC could be greatly increased by the introduction of DOP at high pressure. Morphologies of spherulites of BAPC with different characteristics were observed during the investigation, including ellipsoids ascribed to the liquid-liquid phase separation via spinodal decomposition, sheaf-l

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8

Zhang, Yaqiong, Feng Jiang, Wentao Wang, and Zhigang Wang. "Speeding of Spherulitic Growth Rate at the Late Stage of Isothermal Crystallization Due to Interfacial Diffusion for Double-Layer Semicrystalline Polymer Films." Journal of Physical Chemistry B 118, no. 30 (2014): 9112–17. http://dx.doi.org/10.1021/jp506044y.

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9

Kinloch, Anthony J., Rhys Jones, and John G. Michopoulos. "Fatigue crack growth in epoxy polymer nanocomposites." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 379, no. 2203 (2021): 20200436. http://dx.doi.org/10.1098/rsta.2020.0436.

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The present paper describes detailed analyses of experimental data for the cyclic-fatigue behaviour of epoxy nanocomposite polymers. It has been shown that the data may be interpreted using the Hartman–Schijve relationship to yield a unique, ‘master’, linear relationship for each epoxy nanocomposite polymer. By fitting the experimental data to the Hartman–Schijve relationship, two key materials parameters may be deduced: (i) the term A , which may be thought of as the fatigue equivalent to the quasi-static value of the fracture energy, G c , and (ii) the fatigue threshold value, Δ G thr , belo

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10

Kook, S. Y., J. M. Snodgrass, A. Kirtikar, and R. H. Dauskardt. "Adhesion and Reliability of Polymer/Inorganic Interfaces." Journal of Electronic Packaging 120, no. 4 (1998): 328–35. http://dx.doi.org/10.1115/1.2792642.

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The reliability of microelectronic components is profoundly influenced by the interfacial fracture resistance (adhesion) and associated progressive debonding behavior. In this study we examine the interfacial fracture properties of representative polymer interfaces commonly found in microelectronic applications. Specifically, interface fracture mechanics techniques are described to characterize adhesion and progressive bebonding behavior of a polymer/metal interface under monotonic and cyclic fatigue loading conditions. Cyclic fatigue debond-growth rates were measured from ~10−11 to 10−6 m/cyc

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11

Keridou, Ina, Luis J. del Valle, Lutz Funk, et al. "Isothermal Crystallization Kinetics of Poly(4-hydroxybutyrate) Biopolymer." Materials 12, no. 15 (2019): 2488. http://dx.doi.org/10.3390/ma12152488.

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Thermal properties and crystallization kinetics of poly(4-hydroxybutyrate) (P4HB) have been studied. The polymer shows the typical complex melting behavior associated to different lamellar populations. Annealing processes had great repercussions on properties and the morphology of constitutive lamellae as verified by X-ray scattering data. Kinetics of isothermal crystallization was evaluated by both polarizing optical microscopy (POM) and calorimetric (DSC) measurements, which indicated a single crystallization regime. P4HB rendered banded spherulites with a negative birefringence when crystal

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12

Koyama, Naoyuki, and Yoshiharu Doi. "Morphology and biodegradability of a binary blend of poly((R)-3-hydroxybutyric acid) and poly((R,S)-lactic acid)." Canadian Journal of Microbiology 41, no. 13 (1995): 316–22. http://dx.doi.org/10.1139/m95-203.

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The miscibility, morphology, and biodegradability of a binary blend of bacterial poly((R)-3-hydroxybutyric acid) (P((R)-3HB); Mn = 300 000) with atactic poly((R,S)-lactic acid) (P((R,S)-LA); Mn = 9000) were studied by means of differential scanning calorimetry, optical microscopy, scanning electron microscopy, and hydrolysis with and without enzyme. Differential scanning calorimetry revealed that a P((R)-3HB)–P((R,S)-LA) blend had a single glass-transition temperature for all proportions of the components. The spherulites of P((R)-3HB) were volume filled in the blend films, indicating the incl

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13

Kamruzzaman, Mohamed, Mohd Zamin Jumaat, N. H. Ramli Sulong, and A. B. M. Saiful Islam. "A Review on Strengthening Steel Beams Using FRP under Fatigue." Scientific World Journal 2014 (2014): 1–21. http://dx.doi.org/10.1155/2014/702537.

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In recent decades, the application of fibre-reinforced polymer (FRP) composites for strengthening structural elements has become an efficient option to meet the increased cyclic loads or repair due to corrosion or fatigue cracking. Hence, the objective of this study is to explore the existing FRP reinforcing techniques to care for fatigue damaged structural steel elements. This study covers the surface treatment techniques, adhesive curing, and support conditions under cyclic loading including fatigue performance, crack propagation, and failure modes with finite element (FE) simulation of the

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14

MANJUNATHA, C. M., N. JAGANNATHAN, K. PADMALATHA, A. C. TAYLOR, and A. J. KINLOCH. "THE FATIGUE AND FRACTURE BEHAVIOR OF MICRON-RUBBER AND NANO-SILICA PARTICLES MODIFIED EPOXY POLYMER." International Journal of Nanoscience 11, no. 03 (2012): 1240002. http://dx.doi.org/10.1142/s0219581x12400029.

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A thermosetting epoxy polymer was hybrid-modified by incorporating 9 wt.% of CTBN rubber microparticles and 10 wt.% of silica nanoparticles. The resin was poured into steel mould and cured to produce bulk epoxy polymer sheets from which fatigue test specimens were machined. The total fatigue life of the hybrid-modified epoxy polymer was determined by conducting constant amplitude fatigue tests with dog-bone shaped test specimens, at a stress ratio, R = σ min /σ max = 0.1, using a sinusoidal waveform at a frequency of 3 Hz. Further, the fatigue crack growth behavior of the hybrid-modified epoxy

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15

Aziz, Shujahadeen B., Iver Brevik, Muhamad H. Hamsan, et al. "Compatible Solid Polymer Electrolyte Based on Methyl Cellulose for Energy Storage Application: Structural, Electrical, and Electrochemical Properties." Polymers 12, no. 10 (2020): 2257. http://dx.doi.org/10.3390/polym12102257.

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Compatible green polymer electrolytes based on methyl cellulose (MC) were prepared for energy storage electrochemical double-layer capacitor (EDLC) application. X-ray diffraction (XRD) was conducted for structural investigation. The reduction in the intensity of crystalline peaks of MC upon the addition of sodium iodide (NaI) salt discloses the growth of the amorphous area in solid polymer electrolytes (SPEs). Impedance plots show that the uppermost conducting electrolyte had a smaller bulk resistance. The highest attained direct current DC conductivity was 3.01 × 10−3 S/cm for the sample inte

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16

Jitonnom, Jitrayut, and Wijitra Meelua. "Cationic ring-opening polymerization of cyclic carbonates and lactones by group 4 metallocenes: A theoretical study on mechanism and ring-strain effects." Journal of Theoretical and Computational Chemistry 16, no. 01 (2017): 1750003. http://dx.doi.org/10.1142/s0219633617500031.

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Group 4 metallocene-mediated cationic ring-opening polymerizations of a series of lactones and cyclic carbonates, with different ring sizes ([Formula: see text]–8) have been theoretically studied. Using the “naked cation” approach in combination with density functional theory, the activated chain-end mechanism and the influence of transition metals, solvent and monomer ring size on the polymerizability were explored in detail. The results showed that the cationic metallocene–monomer complex, [catalyst][monomer][Formula: see text], is formed, generating cationic (carbocation ion) species respon

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17

Mansurova, Irina A., Olga Yu Isupova, Andrey A. Burkov, and Konstantin E. Gavrilov. "ELASTIC-HYSTERESIS PROPERTIES OF RUBBER CONTAINING CARBON NANOTUBES FUNCTIONALYZED BY POLYMER." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 61, no. 4-5 (2018): 76. http://dx.doi.org/10.6060/tcct.20186104-05.5596.

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The paper investigates the influence of functionalized carbon nanotubes (CNTs) on the range of elastic-strength and elastic-hysteresis properties of vulcanizates based on SKI-3. It is established that during the functionalization of CNT (0.5 g) from an aqueous solution of polyvinylpyrrolidone (0.5 g / 100 ml) macromolecules are adsorbed on the nanoparticle surface, that is reflected in the intensity of intermolecular interaction and conformation of macromolecules according to IR spectroscopy (FTIR spectrometer «Infralum FT-08», ATIR methods). According to the transmission electron microscopy (

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18

Jen, Yi-Ming, Jui-Cheng Huang, and Kun-Yang Zheng. "Synergistic Effect of Multi-Walled Carbon Nanotubes and Graphene Nanoplatelets on the Monotonic and Fatigue Properties of Uncracked and Cracked Epoxy Composites." Polymers 12, no. 9 (2020): 1895. http://dx.doi.org/10.3390/polym12091895.

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The fatigue properties of the polymer nanocomposites reinforced with a hybrid nano-filler system have seldom studied before. Accordingly, epoxy nanocomposites with various multi-walled carbon nanotube (MWCNT)/graphene nanoplatelet (GNP) filler ratios were prepared to study comprehensively the synergistic effect of the hybrid nano-fillers on the monotonic and cyclic mechanical properties of the nanocomposites. The quasi-statically tensile properties and fatigue-life curves were experimentally determined using uncracked bulk specimens. Additionally, pre-cracked specimens were utilized to study t

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19

Du, T., M. Liu, S. Seghi, K. J. Hsia, J. Economy, and J. K. Shang. "New Technique for Determining Mechanical Property of Polymer/Metal Interface." MRS Proceedings 661 (2000). http://dx.doi.org/10.1557/proc-661-kk5.1.

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ABSTRACTA new experimental technique for determining mechanical properties of the polymer-metal interface was developed by replacing conventional mechanical testing machine with a piezoelectric actuator. Using this technique, fatigue crack growth behavior of epoxy/aluminum interface was studied as a function of electric field, crack length and cyclic frequency. The crack growth rate was found to depend on the magnitude of the applied electric field and decrease with testing frequency.

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20

Snodgrass, Jeffrey M., and Reinhold H. Dauskardt. "The Effect of Fatigue on the Adhesion and Subcritical Debonding of Benzocyclobutene/Silicon Dioxide Interfaces." MRS Proceedings 612 (2000). http://dx.doi.org/10.1557/proc-612-d1.3.1.

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AbstractThe effect of fatigue loading on microelectronic thin film interfaces has until now been difficult to quantify. Most industrial fatigue testing uses HAST (Highly Accelerated Stress Testing) protocols, which inherently convolutes the effects of mechanical fatigue and the test environment. Our work focuses on isolating the deleterious effects of mechanical fatigue on interfaces, which we have found to be substantial. In this study, the integrity of a low-k polymer interface involving benzocyclobutene (BCB) and silica was examined under a variety of loading conditions. Critical (fast frac

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21

Kook, Seung-Yeop, Amol Kirtikar, and Reinhold H. Dauskardt. "Adhesion and Progressive Debonding of Polymer/Metal Interfaces: Effects of Temperature and Environment." MRS Proceedings 563 (1999). http://dx.doi.org/10.1557/proc-563-263.

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AbstractThe interfacial fracture properties of a representative polymer/metal interface commonly found in microelectronic applications are examined. The double cantilever beam (DCB) configuration was used to investigate the effects of environmental variables on interfacial adhesion and progressive delamination under monotonic and cyclic fatigue loading conditions. The steady-state interfacial fracture energy, Gss, taken from the plateau of the R-curve, of a representative silica-filled Phenol-Novolac epoxy on a Nielectroplated Cu substrate showed little sensitivity to the presence of moisture.

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22

Sisti, Laura, Lara Finelli, Nadia Lotti, Corrado Berti, and Andrea Munari. "Memory effect in melting behaviour, crystallization kinetics and morphology of poly(propylene terephthalate)." e-Polymers 3, no. 1 (2003). http://dx.doi.org/10.1515/epoly.2003.3.1.689.

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AbstractCrystallization kinetics and melting behaviour of poly(propylene terephthalate) (PPT) were investigated by means of differential scanning calorimetry and hot-stage optical microscopy. Isothermal crystallization kinetics was analysed according to the Avrami treatment. The effects of temperature and duration of melting on the overall rate of isothermal crystallization were studied: the rate was found to decrease with increasing melting temperature and melting time. This result was discussed on the basis of the gradual destruction of predetermined athermal nuclei. Values of the Avrami exp

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23

Benson, R. S., and H. J. Kim. "Effect of Calcification on The Fatigue Behavior of Fluorinated Polyurethanes." MRS Proceedings 599 (1999). http://dx.doi.org/10.1557/proc-599-281.

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AbstractThe present study compares the fatigue propagation behavior of a fluorinated and nonfluorinated polyurethane-calcium salt blends. The calcium salts used in this study are calcium chloride and hydroxyapatite (HAP). The fatigue crack propagation (FCP) behavior of the polyurethanes exhibited a dependence on the chemical composition of the polymer and calcium salt. The pure non-fluorinated PTMG2000 did no undergo crack propagation. While the fluorinated PTMG2003F exhibit a crack propagation rate of 7.8 × 10-6m/cycle at constant strain amplitude and tearing energy range. The incorporation o

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24

del Valle, María Angélica, María Belén Camarada, Fernando Díaz, and Gastón East. "Correlation between morphology and NGM of 3,4- ethylenedioxythiophene (EDOT) in acetonitrile." e-Polymers 8, no. 1 (2008). http://dx.doi.org/10.1515/epoly.2008.8.1.839.

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AbstractThe nucleation and growth mechanism (NGM) for the electro-oxidation of 3,4-ethylenedioxythiophene (EDOT) in acetonitrile on platinum and tin(IV) oxide electrodes was determined by analyzing the potentiostatic current-time transients inferred from electrocrystallization theory. The measurements were complemented by using atomic force microscopy (AFM) and scanning electron microscopy (SEM). Preliminary studies performed to establish the working conditions for the potentiostatic technique using cyclic voltammetry (CV) demonstrated that under the working conditions employed herein the best

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