Open AccessCharacterization of Functionally Graded Polyurethane Elastomers
Author(s) -
Teerin Kongpun,
Mutsuhisa Furukawa
Publication year - 2014
Publication title -
energy procedia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.474
H-Index - 81
ISSN - 1876-6102
DOI - 10.1016/j.egypro.2014.07.144
Subject(s) - differential scanning calorimetry , spherulite (polymer physics) , polyurethane , materials science , glass transition , fourier transform infrared spectroscopy , elastomer , optical microscope , composite material , polymer chemistry , phase (matter) , chemical engineering , polymer , scanning electron microscope , chemistry , organic chemistry , thermodynamics , physics , engineering
Functionally graded polyurethane elastomers (FGPUEs) were prepared by poly(oxytretamythylene) glycol (PTMG) and 4, 4'-diphenylmethane diisocyanate (MDI) with two molds fixed at different temperature. Effect of temperature gradient on the molecular aggregation state and mechanical properties were studied by differential scanning calorimetry (DSC), polarized optical microscope (POM), Fourier transform infrared spectroscopy (FT-IR) and pulsed nuclear magnetic resonance (NMR). Spherulite size of FGPUEs depended on the temperature gradient. Spherulite content of FGPUEs decreased from the low temperature side to the higher temperature side and spherulite size became greater toward the higher one. The glass transition increased from the lower temperature side to the higher temperature side. This was associated with the strong phase separation of the lower temperature side
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