کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
228286 | 464837 | 2012 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structural investigations of toluene diisocyanate (TDI) and trimethylolpropane (TMP)-based polyurethane prepolymer
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
Polyurethane prepolymer prepared from nonequivalent amounts of toluene diisocyanate (TDI) over trifunctional trimethylolpropane (TMP) was followed by gel permeation chromatography (GPC). Steric hindrance of TMP was considered as the main factor affecting the molar mass distribution, especially in the higher molecular weight region. An optimum reaction condition was the initial NCO/OH ratio of 3 and the reaction temperature of 50 °C. Then polyurethane prepolymer could be purified through the thin film evaporator with excellent properties. A combination of mass spectrometry (MS) and 1H nuclear magnetic resonance (NMR) spectroscopy was employed to identify and confirm the individual compounds presented from GPC analysis.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Industrial and Engineering Chemistry - Volume 18, Issue 5, 25 September 2012, Pages 1620–1627
Journal: Journal of Industrial and Engineering Chemistry - Volume 18, Issue 5, 25 September 2012, Pages 1620–1627
نویسندگان
Yong He, Xinya Zhang, Xinfang Zhang, Hong Huang, Jie Chang, Huanqin Chen,