Preparation and Characterization of Cross-Linked Poly(butylene succinate) by Multifunctional Toluene Diisocyanate鈥揟rimethylolpropane Polyurethane Prepolymer

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• 作者：Xiang Lu ; Jintao Huang ; Guangjian He ; Li Yang ; Ning Zhang ; Yongqing Zhao ; Jinping Qu
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2013
• 出版时间：September 25, 2013
• 年：2013
• 卷：52
• 期：38
• 页码：13677-13684
• 全文大小：503K
• 年卷期：v.52,no.38(September 25, 2013)
• ISSN：1520-5045

文摘

Cross-linked poly(butylene succinate) (PBS) was prepared by the reactions of the end hydroxyl groups of PBS with toluene diisocyanate and trimethylolpropane (TDI鈥揟MP) polyurethane prepolymer at the processing temperature. The effects of varied TDI鈥揟MP prepolymers on properties such as mechanical properties, thermal properties, dynamic mechanical properties, and crystal morphology were investigated. The results indicated that TDI鈥揟MP prepolymer could cross-link PBS with high efficiency. The gel fraction of the cross-linked PBS increased with the content of TDI鈥揟MP prepolymer, and the melt flow index of PBS decreased. Differential scanning calorimetry and dynamic mechanical analysis revealed that the crystallization temperature and glass transition temperature increased with the content of the TDI鈥揟MP prepolymer, while the melting points and degree of relative crystallinity decreased. The cross-linked PBS also showed improved tensile properties, impact properties, thermal stability, and dynamic mechanical properties.