کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5207114 1382336 2011 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Characteristics of the phase transition of poly(siloxane/ether urethane) copolymers
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Characteristics of the phase transition of poly(siloxane/ether urethane) copolymers
چکیده انگلیسی
The aim of this study is to investigate the characteristics of the phase transition for poly(siloxane/ether urethane) copolymers (PSi-EUs) consisting of PTMG/PDMS mixed soft segments and urethane hard segments by differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA). PSi-EUs exhibit three regions of amorphous phase transition, involving the PDMS soft phase, the PTMG soft phase and the urethane hard phase; therefore, they display phase separation due to low miscibility. Intermolecular hydrogen bonding, which is key to phase mixing, hence resulting in a low degree of phase separation, occurs between the PTMG soft segments in the PTMG/PDMS mixed soft phase and the urethane hard segments. Accordingly, the PSi-EUs are superior to poly(siloxane urethane) copolymer (PSiU) in terms of tensile strength due to the low phase separation and strain-induced crystallization resulting from PTMG soft segments.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Testing - Volume 30, Issue 1, February 2011, Pages 50-59
نویسندگان
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