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Journal articles on the topic 'PTMG'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

Hu, Wei, Lei Wang, Quanyong Wang, et al. "Polypropylene Glycol-Polyoxytetramethylene Glycol Multiblock Copolymers with High Molecular Weight: Synthesis, Characterization, and Silanization." Molecules 24, no. 23 (2019): 4317. http://dx.doi.org/10.3390/molecules24234317.

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The high crystallization at room temperature and high cost of polyoxytetramethylene glycol (PTMG) have become obstacles to its application. To overcome these problems, a segment of PTMG can be incorporated into a block copolymer. In this work, polypropylene (PPO) glycol-polyoxytetramethylene (PPO-PTMG) multiblock copolymers were designed and synthesized through a chain extension between hydroxyl (OH)-terminated PPO and PTMG oligomers. The chain extenders, feed ratios of the catalyst/chain extender/OH groups, reaction temperature, and time were optimized several times to obtain a PPO-PTMG with

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2

Tao, Hai Tao, Xi Jun Liu, and Tie Ning Ma. "Preparation and Mechanical Properties of Polyurethane Elastomer with Two Soft Segments of HTPB/PTMG." Advanced Materials Research 150-151 (October 2010): 1689–92. http://dx.doi.org/10.4028/www.scientific.net/amr.150-151.1689.

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In this paper, a series of polyurethane elastomers (PUE) were prepared employing casting method using toluene diisocyanate (TDI), hydroxy-terminated butadiene-acrylonitrile copolymer(HTBN) and polytetrahydrofuran glycol (PTMG) as the main raw materials, and using 2,4- and 2,6- dimethylthioaromatic diamine (DMTDA) as a chain extender. The effects of the content of NCO in PUE (NCO%), mass ratio of HTBN/PTMG, molecular weight of PTMG, dosage of chain extender and heat treatment on the mechanical properties of PUE were studied. The results showed that the lower molecular weight of PTMG and the hig

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3

Yi, Yu Hua, and Rong Yao Ma. "Study of the Main Influence Factors on Compression Set of PTMG Based Polyurethane Elastomer." Advanced Materials Research 630 (December 2012): 67–70. http://dx.doi.org/10.4028/www.scientific.net/amr.630.67.

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The present study described the effect of the different synthetic methods, hard segment types, chain extension coefficient and the starting NCO/OH molar ratio on the compression set and the other properties of castable polyurethanes based on polytetrahydrofuran glycol (PTMG).The result showed that the system of PTMG/TDI/MOCA prepared by a quasi-prepolymer method and with the starting molar ratio of TDI to PTMG of 6:1 exhibits lower compression set.

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4

Behniafar, Hossein, and Mojtaba Yazdi. "PTMG-Modified MWCNT/PTMG-based polyurethane nanocomposites: Strong interaction and homogeneous dispersion." Polymer Science Series B 58, no. 6 (2016): 736–44. http://dx.doi.org/10.1134/s1560090416060038.

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5

SOLOMON, S., and P. G. LAUWERS. "PARALLEL-TRANSPORTED MULTIGRID BEATS CONJUGATE GRADIENT." International Journal of Modern Physics C 03, no. 01 (1992): 149–60. http://dx.doi.org/10.1142/s0129183192000117.

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The convergence rates for inverting the Dirac matrix in the SU(2) gauge theory on a square two-dimensional lattice are compared for different lattice sizes in the physical region. The Parallel-Transported Multigrid algorithm (PTMG) turns out to be superior to the Conjugate-Gradient (CG) approach. As the lattice size L increases (together with the correlation length ξ) the PTMG becomes more and more efficient. On a 256×256 lattice with the bare quark mass mbare=0.0005 and ξ=20, the PTMG is at least ten times faster than the CG. It seems reasonable to expect similar results in four dimensions.

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6

Lee, Wen-Jau, Ming-Shan Hu, Chao-Yun Yu, and Yi-Chun Chen. "Influences of liquefied lignin content on the properties of waterborne polyurethane prepared with different chain extenders." Holzforschung 75, no. 7 (2020): 668–76. http://dx.doi.org/10.1515/hf-2020-0134.

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Abstract Waterborne polyurethane resins (WPUs) were prepared from polytetramethylene ether glycol (PTMG) and PTMG/polyhydric alcohol liquefied lignin (LL) with isophorone diisocyanate (IPDI), and ethylenediamine (EDA) and 1,4-butanediol (1,4-BD) were used as chain extenders. The effects of LL and the kind of chain extender on the properties of the WPU suspensions and dried films were studied. WPU suspensions prepared with PTMG/LL as the polyol had higher viscosity and larger average particle dimension than those with PTMG alone. WPU films prepared with EDA as the chain extender had higher tens

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7

Bae, Ji-Hong, Jong Chan Won, Won Bin Lim, et al. "Highly Flexible and Photo-Activating Acryl-Polyurethane for 3D Steric Architectures." Polymers 13, no. 6 (2021): 844. http://dx.doi.org/10.3390/polym13060844.

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An acryl-functionalized polyurethane (PU) series was successfully synthesized using poly(tetramethylene ether) glycol-methylene diphenyl diisocyanate (PTMG-MDI) oligomer based on urethane methacrylates to control the flexibility of photo-cured 3D printing architectures. The mass ratio of acryl-urethane prepolymer: 1,4-butanediol (BD) chain-extender: diphenyl(2,4,6-trimethylbenzoyl) phosphine oxide (TPO) photoinitiator was 10:0.25:1. To produce suitably hard and precisely curved 3D architectures, the optimal UV absorbance and exposure energy of the acryl-PTMG-MDI resin were controlled precisely

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8

Wang, Jian Hua, Shuen Liang, Chun Rong Tian, Xiu Li Zhao, and Xiao Yan Lin. "Study on Degradable Polyurethane Foams with Mixed PEG/PCL and PLA/PCL Soft Segments." Advanced Materials Research 518-523 (May 2012): 821–27. http://dx.doi.org/10.4028/www.scientific.net/amr.518-523.821.

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Through inclusion of different polymer chains with different properties into polyurethane matrix, such as poly(ethylene glycol) (PEG), poly(ε-caprolactone) (PCL), poly(lactic acid) (PLA), or poly(tetramethylene oxide) (PTMG), degradable polyurethane foams (PUFs) with different molecular structure were prepared. Influences of molecular structure on PUF materials’ performance were studied systematically. When PEG, PCL, PLA, and PTMG serve as soft segment, PUFs’ storage modulus and glass transition temperature (Tg) of PUFs decrease with following order: PLA>PCL>PEG>PTMG (flexibility of P

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9

Kwiatkowska, Magdalena, Inez Kowalczyk, Zbigniew Rozwadowski, Elżbieta Piesowicz, and Anna Szymczyk. "Hytrel-like Copolymers Based on Furan Polyester: The Effect of Poly(Butylene Furanoate) Segment on Microstructure and Mechanical/Elastic Performance." Molecules 28, no. 7 (2023): 2962. http://dx.doi.org/10.3390/molecules28072962.

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This paper aims to compare the performance of two Hytrel-like segmented copolymers: “classic” PBT-b-PTMG and fully bio-based PBF-b-PTMG, containing poly(butylene furanoate) as the rigid segment. The idea behind this research is to assess whether the sustainable copolymers can successfully replace those “classic” once at the thermoplastic elastomers’ market. Two series of copolymers were synthesized under the same process parameters, had the same compositions, but differed in aromatic ring structure in terephthalate/furanoate unit. Furthermore, the materials were processed by injection moulding

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10

Sajkiewicz, P., J. Brzeska, P. Denis, W. Sikorska, M. Kowalczuk, and M. Rutkowska. "The preliminary studies of a structure and electrospinning of new polyurethanes based on synthetic atactic poly[(R, S)-3-hydroxybutyrate]." Bulletin of the Polish Academy of Sciences: Technical Sciences 62, no. 1 (2014): 55–60. http://dx.doi.org/10.2478/bpasts-2014-0006.

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Abstract Novel polyurethanes based on synthetic, atactic poly[(R, S)-3-hydroxybutyrate] (a-PHB) and polycaprolactone (PCL) or polyoxytetramethylene (PTMG) diols were synthesized. It was shown that the presence of a-PHB within soft segments reduces crystallinity of PUR. Because of the low melting temperature for polyurethanes with PCL in soft segments, at this stage of work, electrospinning was limited to polyurethanes containing PTMG and a-PHB. Polyurethane containing 80% of PTMG and 20% of a-PHB was electrospun at various parameters from hexafluoro-2-propanole solution, resulting in formation

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11

Oguro, Kaoru, Nobuaki Kun, Hiromichi Nishimura, Mitaka Kobayashi, and Takao Doi. "Modified PTMG Based Thermoplastic Polyurethane Elastomers." Journal of Elastomers & Plastics 17, no. 4 (1985): 261–72. http://dx.doi.org/10.1177/009524438501700404.

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12

Nagai, Yasutaka, Daisuke Nakamura, Tomoyuki Miyake, et al. "Photodegradation mechanisms in poly(2,6-butylenenaphthalate-co-tetramethyleneglycol) (PBN–PTMG). I: influence of the PTMG content." Polymer Degradation and Stability 88, no. 2 (2005): 251–55. http://dx.doi.org/10.1016/j.polymdegradstab.2004.10.016.

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13

Luo, Kun, Li Wang, Xiaohu Chen, et al. "Biomimetic Polyurethane 3D Scaffolds Based on Polytetrahydrofuran Glycol and Polyethylene Glycol for Soft Tissue Engineering." Polymers 12, no. 11 (2020): 2631. http://dx.doi.org/10.3390/polym12112631.

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In this study, a novel polyurethane porous 3D scaffold based on polyethylene glycol (PEG) and polytetrahydrofuran glycol (PTMG) was developed by in situ polymerization and freeze drying. Aliphatic hexamethylene diisocyanate (HDI) as a nontoxic and safe agent was adopted to produce the rigid segment in polyurethane polymerization. The chemical structure, macrostructure, and morphology—as well as mechanical strength of the scaffolds—were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscope (SEM), and tensile tests. The results sho

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14

Wang, Wenwen, Manli Li, Pengcheng Zhou, Zhong Yan, and Dong Wang. "Design and synthesis of mechanochromic poly(ether-ester-urethane) elastomer with high toughness and resilience mediated by crystalline domains." Polymer Chemistry 13, no. 15 (2022): 2155–64. http://dx.doi.org/10.1039/d2py00085g.

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Poly(ether-ester-urethane) elastomers with spiropyran were designed and synthesized to perform mechanochromic behavior. Poly(ether-ester) precursor with crystalline PBT domains and PTMG soft segments endows it with high toughness and resilience.

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15

Rahman, Mohammad Mizanur, Md Hasan Zahir, Aasif Helal, Rami K. Suleiman, Bashirul Haq, and A. Madhan Kumar. "UV-Protected Polyurethane/f-Oil Fly Ash-CeO2 Coating: Effect of Pre-Mixing f-Oil Fly Ash-CeO2 with Monomers." Polymers 13, no. 19 (2021): 3232. http://dx.doi.org/10.3390/polym13193232.

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A series of UV-protected coatings were prepared using cerium-oxide-functionalized oil fly ash (f-OFA-CeO2) in waterborne polyurethane (WBPU) dispersions. Three monomers, namely, poly(tetramethyleneoxide glycol) (PTMG), polydimethylsiloxane-hydroxy terminated (PDMS) and 4,4-dicyclohexylmethane diisocyanate (H12MDI), were used to pre-mix with f-OFA-CeO2 separately, followed by the synthesis of WBPU/f-OFA-CeO2 dispersions. The f-OFA-CeO2 distribution and enrichment into any part (top/bottom/bulk) of the coating was strongly affected by the pre-mixing of f-OFA-CeO2. The f-OFA-CeO2 was densely dist

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16

Setoyama, Tohru, Mitsuharu Kobayashi, Yoshio Kabata, Tomohiro Kawai, and Akio Nakanishi. "New industrial process of PTMG catalyzed by solid acid." Catalysis Today 73, no. 1-2 (2002): 29–37. http://dx.doi.org/10.1016/s0920-5861(01)00515-6.

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17

Jeon, Seong Hun, Yongin You, Hyelim Jin, et al. "Hydroupgrading of Bio-Oil Over PtMg/KIT-6 Catalysts." Journal of Nanoscience and Nanotechnology 19, no. 2 (2019): 1126–29. http://dx.doi.org/10.1166/jnn.2019.15927.

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18

Harmatz, M., P. Lauwers, S. Solomon, and T. Wittlich. "Visual study of zero-modes role in PTMG convergence." Nuclear Physics B - Proceedings Supplements 30 (March 1993): 192–99. http://dx.doi.org/10.1016/0920-5632(93)90189-d.

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19

Min, Jin-Gyu, Won-Bin Lim, Ju-Hong Lee, et al. "Isosorbide-Based Thermoplastic Polyurethane with Different Polyols and Soft/Hard Ratios." Advances in Polymer Technology 2023 (May 24, 2023): 1–6. http://dx.doi.org/10.1155/2023/6411623.

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A series of isosorbide-based thermoplastic polyurethanes (ISB-TPUs) with different soft/hard ratios have been successfully step polymerized using individual two types of polycaprolactone diol (PCL) or poly (tetramethylene glycol) (PTMG) for soft segment and bio-based isosorbide (ISB) or methylene diphenyl diisocyanate (MDI) for hard segment, based on the similar molecular weight. The effect of the molecular structure on the mechanical and thermal properties has been evaluated in terms of the types of soft/hard and polyol, ranging from 6/4 to 9/1 ratio values. With the increasing of PCL content

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20

Bao, Li-Hong, Li-Hong Bao, and Hai-Teng Ma. "Preparation of Temperature-Sensitive Polyurethanes Based on Modified Castor Oil." Fibres and Textiles in Eastern Europe 25 (June 30, 2017): 34–39. http://dx.doi.org/10.5604/01.3001.0010.1686.

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A series of temperature-sensitive polyurethanes (TSPUs) with polytetrahydrofuran glycol (PTMG), poly(ethylene glycol) (PEG) and maleic anhydride modified castor oil (MCO) as soft segments were prepared in this paper. The morphology of the temperature-sensitive polyurethane films was characterised by SEM, DSC and WAXD. SEM studies were also carried out to investigate the surface structure of coated and uncoated fabrics. The water vapour permeability of the coated and uncoated fabrics were measured as well. The results showed that a nonporous TSPU layer was formed on the coated fabric surface. T

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21

Shao, Chenrui. "Study on the Properties of PTMG Oughener Modified Epoxy Resins." International Journal of Advances in Chemistry 5, no. 1 (2019): 01–06. http://dx.doi.org/10.5121/ijac.2019.5101.

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22

Furukawa, Mutsuhisa, Yoshinori Oda and, and Hiromi Higashi. "Synthesis and Characterisation of Liquid-Crystalline Polyurethane Elastomers*." Cellular Polymers 15, no. 1 (1996): 1–7. http://dx.doi.org/10.1177/0262489319961501004.

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Polyurethane elastomers (PUEs) containing conventional and mesogenic hard segments were prepared from poly (oxytetramethylene)glycol (PTMG), 2.4-toluene diisocyanate, and mesogenic diols and/or 1,4-butanediol. The mesogenic diols used are 4,4'-bis(2-hydroxyethoxy)benzophenone, and dihydroxy-p-quarterphenyl. Effects of addition of mesogenic diol to 1.4-butanediol on mechanical, thermal properties, and morphologies of PUEs were investigated.

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23

Yi, Yu Hua, and Hao Shi. "Effect of the Starting NCO/OH Molar Ratio on the Structure and Properties of Polyurethane." Advanced Materials Research 415-417 (December 2011): 1261–64. http://dx.doi.org/10.4028/www.scientific.net/amr.415-417.1261.

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The present study described the effect of the starting NCO/OH molar ratio on the structure and properties of castable polyurethanes based on polytetrahydrofuran glycol (PTMG) and 2,4- toluene diisocyanate (TDI). The structural was tested by SEM. The result showed that higher starting NCO/OH molar ratio can lead to higher degree of microphase separation, decrease the compression set and improve the dynamic mechanical properties.

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24

SHIRASAKA, Hitoshi, Megumi YAMASHITA, Tadahiro INAGAKI, Shin-ichi INOUE, and Hiroshi OKAMOTO. "Elastomeric properties of polyurethane prepared from PTMG regulated molecular weight distribution." NIPPON GOMU KYOKAISHI 72, no. 3 (1999): 123–29. http://dx.doi.org/10.2324/gomu.72.123.

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25

Wang, Wei, Jie Wang, Chu Gong, Zhaoguo Zhu, Kit H. Bowen та Xinxing Zhang. "Magic Clusters PtMg 2,3 H 5 − Facilitated by Local σ‐Aromaticity". ChemPhysChem 21, № 21 (2020): 2388–91. http://dx.doi.org/10.1002/cphc.202000691.

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26

Lee, Han Sup, Hae Dong Park, and Chang Ki Cho. "Domain and segment orientation behavior of PBS-PTMG segmented block copolymers." Journal of Applied Polymer Science 77, no. 3 (2000): 699–709. http://dx.doi.org/10.1002/(sici)1097-4628(20000718)77:3<699::aid-app25>3.0.co;2-h.

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27

Lee, Sun A., and Young Ho Kim. "Synthesis of PTMG-IPDI Waterborne Polyurethanes Containing Fluorine Component and Hydrolysis with High-Temperature Water Vapor." Polymer Korea 43, no. 2 (2019): 252–60. http://dx.doi.org/10.7317/pk.2019.43.2.252.

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28

NAGAI, Yasutaka, Takeshi SAKURAI, Hitoshi UENO, and Koji KOBAYASHI. "Wavelength Sensitivity of the Photodegradation of Polybutyleneterephthalate-block-Polytetramethyleneglycol (PBT-block-PTMG)." KOBUNSHI RONBUNSHU 69, no. 4 (2012): 160–65. http://dx.doi.org/10.1295/koron.69.160.

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29

Beamson, G., B. T. Pickup, W. Li, and S. M. Mai. "XPS Studies of Chain Conformation in PEG, PTrMO, and PTMG Linear Polyethers." Journal of Physical Chemistry B 104, no. 12 (2000): 2656–72. http://dx.doi.org/10.1021/jp9905629.

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30

Zhang, Bo, Huajun Duan, Xiaoxiao Tao, and Wenjing Dong. "Study on the Mechanical Properties of Polyurethane Based on PTMG-TMP System." Polymer-Plastics Technology and Engineering 57, no. 17 (2018): 1743–51. http://dx.doi.org/10.1080/03602559.2017.1422266.

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31

Yang, Chien-Hsin, Yat-June Li, and Ten-Chin Wen. "Mixture Design Approach to PEG−PPG−PTMG Ternary Polyol-Based Waterborne Polyurethanes." Industrial & Engineering Chemistry Research 36, no. 5 (1997): 1614–21. http://dx.doi.org/10.1021/ie9602973.

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32

Xu, Cheng Shu, Cheng Cheng Tian, Wei Dong Zhang, et al. "Synthesis and Properties of Polypropylene Carbonate Polyol-Based Waterborne Polyurethane." Advanced Materials Research 936 (June 2014): 58–62. http://dx.doi.org/10.4028/www.scientific.net/amr.936.58.

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Different kinds of anionic polyhydric alcohols water-borne polyurethane (WPU) emulsion and films were prepared by separately taking polypropylene carbonate polyol (PPC), polyethylene-1,4-buthylene adipate glycol (PBA) and polytetramethylene ether glycol (PTMG) with the same molecular weight as soft segment. Their structure and properties were characterized with Fourier transform infrared spectrometry (FT-IR), X-ray diffraction (XRD), rigidity, adhesive power, contact angle and water absorption. Comparing their properties, it was found that the rigidity, adhesive power and water resistance of P

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33

Zhang, Zengping, Xinhe Yu, Zhaofei Wang, et al. "MDI-PTMG-based TPU modified asphalt: Preparation, rheological properties and molecular dynamics simulation." Fuel 379 (January 2025): 133007. http://dx.doi.org/10.1016/j.fuel.2024.133007.

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34

Du, Yang, Jingshu Zhang, and Chao Zhou. "Synthesis and properties of waterborne polyurethane-based PTMG and PDMS as soft segment." Polymer Bulletin 73, no. 1 (2015): 293–308. http://dx.doi.org/10.1007/s00289-015-1487-0.

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35

Mun, Seon Yeong, Hee Dong Lee, and Young Ho Kim. "Effects of the Aziridine Crosslinking on the Hydrolysis of PTMG-IPDI and PC-IPDI Water-borne Polyurethane Films." Polymer Korea 42, no. 3 (2018): 504–12. http://dx.doi.org/10.7317/pk.2018.42.3.504.

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36

Veloso-Fernández, Antonio, José Manuel Laza, Leire Ruiz-Rubio, et al. "Advancing Food Packaging: Exploring Cyto-Toxicity of Shape Memory Polyurethanes." Materials 17, no. 19 (2024): 4770. http://dx.doi.org/10.3390/ma17194770.

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Cytotoxicity is a critical parameter for materials intended for biological applications, such as food packaging. Shape-memory polyurethanes (SMPUs) have garnered significant interest due to their versatile properties and adaptability in synthesis. However, their suitability for biological applications is limited by the use of aromatic isocyanates, such as methylene diphenyl 4,4′-diisocyanate (MDI) and toluene diisocyanate (TDI), which are commonly used in SMPU synthesis but can generate carcinogenic compounds upon degradation. In this study, thermo-responsive shape-memory polyurethanes (SMPUs)

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37

LAUWERS, P. G., and T. WITTLICH. "INVERSION OF THE FERMION MATRIX IN LATTICE QCD BY MEANS OF PARALLEL-TRANSPORTED MULTIGRID (PTMG)." International Journal of Modern Physics C 04, no. 03 (1993): 609–20. http://dx.doi.org/10.1142/s0129183193000586.

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The standard PTMG method, invented and tested for the inversion of the fermion matrix (Dirac-operator) in the case of U(1) and SU(2) lattice gauge theories with staggered fermions, has now been generalized to SU(3). A crucial ingredient of the new algorithm is the way SU(3) link elements are averaged in the generation of the coarse grid link elements. Numerical results are presented for the two-dimensional case. For 128 × 128 lattices and physically relevant values of the coupling constant β and of the quark mass mq, the new algorithm is an order of magnitude faster in CPU time than its leadin

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38

Lee, Chia-Fang, Chin-Wen Chen, Syang-Peng Rwei, and Fu-Sheng Chuang. "Thermal Behavior and Morphology of Thermoplastic Polyurethane Derived from Different Chain Extenders of 1,3- and 1,4-Butanediol." Applied Sciences 11, no. 2 (2021): 698. http://dx.doi.org/10.3390/app11020698.

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In this study, when deriving thermoplastic polyurethane (TPU), the researchers replaced 1,4-butanediol (1,4-BDO) with 1,3-butanediol (1,3-BDO) as a chain extender and examined how the structure of the chain extender affected the final polymers. Regarding the raw materials for polymerization, three types of commercial polyols with the same molecular weight (Mn = 1000 g/mol), namely, poly (butyl acrylate) (PBA), poly (tetramethylene ether) glycol (PTMG), and polycarbonate diol (PCDL) were used. These polyols were used in conjunction with butanediol and 4,4’-methylene diphenyl diisocyanate. Three

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39

Wei, Kang, Haitao Zhang, Jianbo Qu, Jianyong Wang, Yang Bai, and Futao Sai. "Recyclable Shape-Memory Waterborne Polyurethane Films Based on Perylene Bisimide Modified Polycaprolactone Diol." Polymers 13, no. 11 (2021): 1755. http://dx.doi.org/10.3390/polym13111755.

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Currently, much attention is given to the functionality and recyclability of waterborne polyurethane (WPU). Herein, ε-caprolactone was used as a chain extender for grafting onto perylene bisimide (PBI) and 1,4-butanediol (BDO) via ring-opening reactions to obtain PBI-PCL and BDO- PCL. Then, two kinds of WPU, namely PBI-WPU (PWPU) and BDO-WPU (BWPU), were fabricated using PBI-PCL/polytetrahydrofuran ether glycol (PTMG) and BDO-PCL/PTMG, respectively, as mixed soft segments. The properties and appearance of PWPU and BWPU emulsions were analyzed in terms of particle size, zeta potential and TEM i

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40

Wang, Wanwan, Hongxiang Chen, Qiaoli Dai, et al. "Thermally healable PTMG-based polyurethane elastomer with robust mechanical properties and high healing efficiency." Smart Materials and Structures 28, no. 1 (2018): 015008. http://dx.doi.org/10.1088/1361-665x/aaebc8.

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41

Roh, S. C., M. J. Park, S. H. Yoo, and C. K. Kim. "Changes in microporous structure of polyethylene membrane fabricated from PE/PTMG/paraffin ternary mixtures." Journal of Membrane Science 411-412 (September 2012): 201–10. http://dx.doi.org/10.1016/j.memsci.2012.04.032.

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42

Stein, Sebastian, Lukas Heletta, Theresa Block, Birgit Gerke, and Rainer Pöttgen. "Equiatomic intermetallic compounds RE PtMg ( RE = Y, Eu, Tb-Tm, Lu) – Structure and magnetism." Solid State Sciences 67 (May 2017): 64–71. http://dx.doi.org/10.1016/j.solidstatesciences.2017.03.006.

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43

Yao, Da Hu, Yu Qing Zhang, and Joong Hee Lee. "Increasing Cryogenic Strength of Epoxy Resin Modified by Reactive Macroglycol." Applied Mechanics and Materials 52-54 (March 2011): 2056–59. http://dx.doi.org/10.4028/www.scientific.net/amm.52-54.2056.

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A bisphenol-A glycidol ether epoxy resin was toughened in cryogenic temperature using reactive macroglycol as modifiers. The properties of modified epoxy resin were characterized by SEM and DMA. Phase-separated structure formed during curing process in the PPG and PTMG modified epoxy resins system, and did not occurred in the PEO modified epoxy resins system. The impact strength of epoxy resin increased at both room temperature (RT) and cryogenic temperature (CT, 77 K) using PEO as modifier. The DMA results confirm that the introduction of PEO chains in the structure of the epoxy increases the

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44

Huang, Wei Bo, Ping Lu, Jing Zhang, and Xin Mao Li. "Study on Morphology and Mechanical Properties of Polyaspartic Esters Based Polyureas." Advanced Materials Research 197-198 (February 2011): 1289–93. http://dx.doi.org/10.4028/www.scientific.net/amr.197-198.1289.

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The morphology, shock absorption and dynamic mechanical properties of a new architectured multifunctional materials- polyaspartic esters (PAE) based ployureas were investigated through FTIR, atomic force microscope(AFM), drop-weight test and dynamic mechanical analysis(DMA). The PAE based polyureas were prepared from synthesized PAE and hexamethylene diisocyanate（HDI）trimer /polytetramethylene ether glycol (PTMG) prepolymer. The FTIR results indicated that hydrogen-bonded urea carbonyl of PAE based polyurea was 76.1%, and the length of hydrogen bonding was 0.306nm. The microphase separation ph

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Wei, Yanhong, Xiaowen Yu, Luziping Zhang, Wenbo Liu, Cong Yong, and Tian Yun. "Synthesis and function studies on formaldehyde adsorption of PEI-PU copolymers." Journal of Physics: Conference Series 2819, no. 1 (2024): 012010. http://dx.doi.org/10.1088/1742-6596/2819/1/012010.

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Abstract The molecular structure of branched-chain polyethyleneimine (PEI) was determined by 13C NMR, which guided the reaction of the primary amine groups in the PEI molecule with IPA-protected MDI-PTMG monoisocyanate polyurethane prepolymer to prepare PEI copolymer-modified polyurethanes (PEI-PUs). The successful synthesis of the PEI-PUs was verified by 1H NMR tests. The results of the formaldehyde adsorption test showed that the active secondary amine groups in the PEI-PU film showed high adsorption ability of formaldehyde gas at room temperature, with an absorption up to 0.804 mmol HCOH/mm

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Mordvinova, E. V., E. V. Oshchepkova, A. A. Fedorovich, et al. "The major arteries and skin microcirculatory vessels status and antihypertensive therapy effect on them in hypertensive patients with high and very high cardiovascular risk." Systemic Hypertension 13, no. 2 (2016): 11–16. http://dx.doi.org/10.26442/sg29123.

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Aim: to assess the state of the large blood vessels and skin microcirculatory vessels and the effects of angiotensin II receptor blockers (ARB) on them in hypertensive patients with high and very high cardiovascular risk (CVR). Subjects and methods. We examined 59 hypertensive patients aged 35-60 years, of which 29 high CVR subjects and 30 very high CVR (without antihypertensive therapy within 2 weeks prior to the study). In all subjects the evaluation of target organ damage, laser Doppler flowmetry (LDF) with initial perfusion parameters registration and amplitude-frequency spectrum of LDF-gr

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Shang, Jiao Jiao, Jian Wu Lan, Shao Jian Lin, Si Chen, and Ya Ni Li. "Synthesis and Characterization of Novel Thermal Stability Poly (ester-imide-ether) with Excellent Lower Temperature Elastic Recovery." Advanced Materials Research 554-556 (July 2012): 258–62. http://dx.doi.org/10.4028/www.scientific.net/amr.554-556.258.

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A new poly(ester-imide-ether) (PEIE) was prepared by melt polymerization from 1,4-butanediol(BD), polytetrahydrofuran diol (PTMG) and a novel imide dicarboxylic acid monomer which was synthesized from 3,3',4,4'-biphenyltetracarboxylic di-anhydride(BPDA) and glycine acid(GLY). The structure, thermal behaviour and elastic recovery of polymer were characterized by FT-IR. thermogravimetric analysis (TGA), differential scanning calorimetry thermograms (DSC) and laboratory stretching machine. The results showed this polymer has excellent thermal stability, 5 % weight loss temperature was at 354°C. M

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Zhang, Jin Cui, Xi Jun Liu, and Tie Ning Ma. "Study on Mechanical Properties of Polyurethane Elastomers for Drum Scraper." Advanced Materials Research 284-286 (July 2011): 2384–87. http://dx.doi.org/10.4028/www.scientific.net/amr.284-286.2384.

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Polyurethane elastomers (PUE) were prepared by casting method using the prepolymer and the chain extender. In here, the prepolymer synthesized by using poly(tetramethylene glycol ether) (PTMG) and toluene diisocyanate (TDI), the chain extender was a mixture of 3,5-dimetylthio toluene diamine (E-300) and triethanolamine. The effects of the NCO concentration in prepolymer, the molar ratio of E-300/triethanolamine, and the chain extension coefficient of NCO/NH2 on the mechanical properties of the prepared PUE were studied. The results showed that the prepared PUE possesses excellent mechanical pr

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Negim, E. S. M., T. Ketegenov, G. S. Irmukhametova, I. N. Sultanbekova, T. N. Tastambekova, and G. A. Mun. "The effect of TDI, PTMG and DMPA on the physico-mechanical properties of polyurethane dispersion containing aromatic isocyanate." International Journal of Biology and Chemistry 9, no. 1 (2016): 68–72. http://dx.doi.org/10.26577/2218-7979-2016-9-1-68-72.

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Ahn, WonSool, and Seong-Ho Eom. "A Study on Reaction Kinetics of PTMG/TDI Prepolymer with MOCA by Non-Isothermal DSC." Elastomers and Composites 50, no. 2 (2015): 92–97. http://dx.doi.org/10.7473/ec.2015.50.2.092.

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