種々の硬化温度と架橋剤含有率で調製したポリウレタンエラストマーのミクロ相分離構造と動的粘弾特性 [in Japanese] Microphase-Separated Structure and Dynamic Viscoelastic Properties of Polyurethanes Elastomers Prepared at Various Temperatures and Cross-Linking Agent Contents [in Japanese]
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The relationship between a microphase-separated structure and dynamic viscoelastic properties of polyurethane elastomers (PUEs) prepared at various temperatures and cross-linking agent contents were investigated. The PUEs were synthesized with poly(oxytetramethylene) glycol (PTMG), 4,4'-diphenylmethane diisocyanate (MDI) and 1,4-butanediol (BD) and a mixture of BD and 1,1,1-trimethylol propane (TMP) by a prepolymer method. The PUEs are in the strong-segregation limit. The microphase-separated structure was investigated using Fourier-transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), small-angle x-ray scattering (SAXS) and atomic force microscope (AFM). The extent of microphase separation of the PUEs became stronger and weaker with increases in curing temperature and trifunctional TMP content, respectively. The consistent results obtained in this study would be quite helpful to design the desirable PUEs.
- Nihon Reoroji Gakkaishi
Nihon Reoroji Gakkaishi 42(2), 143-149, 2014
The Society of Rheology, Japan