TY - JOUR
T1 - Effect of chain architecture of polyol with secondary hydroxyl group on aggregation structure and mechanical properties of polyurethane elastomer
AU - Nozaki, Shuhei
AU - Hirai, Tomoyasu
AU - Higaki, Yuji
AU - Yoshinaga, Kohji
AU - Kojio, Ken
AU - Takahara, Atsushi
N1 - Funding Information:
This work was supported by the Impulsing Paradigm Change through Disruptive Technology (ImPACT) Program, the Photon and Quantum Basic Research Coordinated Development Program from the Ministry of Education, Culture, Sports, Science and Technology, Japan, and Japan Society for the Promotion of Science (JSPS) KAKENHI Grant Number JP 26410138 . Small-angle X-ray scattering measurements were done at BL03XU, BL05SS, BL40XU, the SPring-8 facility with the approval of the Japan Synchrotron Radiation Research Institute (JASRI; Proposal No. 2012B1506, 2013B1186, 2014B1198, 2014B7266, 2015A1514, 2015A7216, 2015B7267, 2016A7217, 2016B7266). We gratefully acknowledge Dr. Hiroyasu Masunaga (Japan Synchrotron Radiation Research Institute (JASRI)), Dr. Hiroki Ogawa (Kyoto University), Dr. Taiki Hoshino, Dr. So Fujinami, and Dr. Tomotaka Nakatani (Riken) for their assistance on the SAXS measurements.
Funding Information:
This work was supported by the Impulsing Paradigm Change through Disruptive Technology (ImPACT) Program, the Photon and Quantum Basic Research Coordinated Development Program from the Ministry of Education, Culture, Sports, Science and Technology, Japan, and Japan Society for the Promotion of Science (JSPS) KAKENHI Grant Number JP 26410138. Small-angle X-ray scattering measurements were done at BL03XU, BL05SS, BL40XU, the SPring-8 facility with the approval of the Japan Synchrotron Radiation Research Institute (JASRI; Proposal No. 2012B1506, 2013B1186, 2014B1198, 2014B7266, 2015A1514, 2015A7216, 2015B7267, 2016A7217, 2016B7266). We gratefully acknowledge Dr. Hiroyasu Masunaga (Japan Synchrotron Radiation Research Institute (JASRI)), Dr. Hiroki Ogawa (Kyoto University), Dr. Taiki Hoshino, Dr. So Fujinami, and Dr. Tomotaka Nakatani (Riken) for their assistance on the SAXS measurements.
Publisher Copyright:
© 2017 Elsevier Ltd
PY - 2017/5/5
Y1 - 2017/5/5
N2 - Polyurethane elastomers (PUEs) based on poly(2-ethyl-1,3-hexamethylene adipate) glycol (PEHA), poly(2,4-diethyl-1,5-pentamethylene adipate) glycol (PDEPA) and poly(2-butyl-2-ethyl-1,3-trimethylene adipate) glycol (PBETA) were synthesized with 4,4’-diphenylmethane diisocyanate (MDI) and 1,4-butane diol (BD)/1,1,1-trimethylol propane (TMP). PEHA has one primary and one secondary hydroxyl groups, but PDEPA or PBETA has two primary hydroxyl groups. The effect of low reactive secondary OH group on molecular aggregation structure and mechanical properties of the PUEs was investigated using Fourier transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), small-angle X-ray scattering (SAXS), dynamic viscoelastic measurement and tensile testing. The study demonstrates that PEHA-based PUE has lower cross-linking density and lower degree of microphase separation than PDEPA- and PBETA-based PUEs. As a result, PEHA-based PUE has lower dynamic storage modulus value at the rubbery plateau region and Young's modulus.
AB - Polyurethane elastomers (PUEs) based on poly(2-ethyl-1,3-hexamethylene adipate) glycol (PEHA), poly(2,4-diethyl-1,5-pentamethylene adipate) glycol (PDEPA) and poly(2-butyl-2-ethyl-1,3-trimethylene adipate) glycol (PBETA) were synthesized with 4,4’-diphenylmethane diisocyanate (MDI) and 1,4-butane diol (BD)/1,1,1-trimethylol propane (TMP). PEHA has one primary and one secondary hydroxyl groups, but PDEPA or PBETA has two primary hydroxyl groups. The effect of low reactive secondary OH group on molecular aggregation structure and mechanical properties of the PUEs was investigated using Fourier transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), small-angle X-ray scattering (SAXS), dynamic viscoelastic measurement and tensile testing. The study demonstrates that PEHA-based PUE has lower cross-linking density and lower degree of microphase separation than PDEPA- and PBETA-based PUEs. As a result, PEHA-based PUE has lower dynamic storage modulus value at the rubbery plateau region and Young's modulus.
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U2 - 10.1016/j.polymer.2017.03.031
DO - 10.1016/j.polymer.2017.03.031
M3 - Article
AN - SCOPUS:85016798291
VL - 116
SP - 423
EP - 428
JO - Polymer
JF - Polymer
SN - 0032-3861
ER -