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研究了聚对苯二甲酸乙二酯(PET)/离子聚合物surlyn体系的反应.由该体系的熔融行为、分子量的测定及红外光谱分析证实:surlyn的侧基—COONa在高温下与PET的酯键反应,会引起PET断链,并生成PET—COONa和PET—R.在更高的温度下,PET—COONa之间的离子端基可相互反应,生成对苯二甲酸钠,并使PET分子链重新连接起来.
The reaction of polyethylene terephthalate (PET) / ionic polymer surlyn system was studied.The melting behavior, molecular weight determination and infrared spectroscopy analysis of the system confirmed that the side group -COONa of surlyn is the same as that of PET Ester bond reaction can cause PET chain scission and generate PET-COONa and PET-R. At higher temperatures, the ionic end groups between PET-COONa react with each other to produce sodium terephthalate, and PET molecules Reconnect the chain.