聚酯型聚硫醇固化剂的活性持久性的研究  

Study on Activity Persistance of Polyester Polymercaptan Curing Agent

作　　者：廖毅彬[1] 殷瑜[1] 寇亮亮[1] 林德洵 林彩凤[1] 陆嘉[1] 薛惠芸 郑津[1] 邹友思[1] 

机构地区：[1]厦门大学化学化工学院材料学院,福建厦门361005

出　　处：《厦门大学学报（自然科学版）》2014年第4期525-530,共6页Journal of Xiamen University：Natural Science

摘　　要：对比了聚醚型聚硫醇和2种聚酯型聚硫醇的活性寿命的差异.通过红外光谱、1 H-NMR和凝胶时间的测试表征聚硫醇的活性寿命.结果表明,以叔胺为促进剂时,以β-巯基丙酸为原料制备得到的聚酯型聚硫醇P(SH)6和聚醚型聚硫醇P(SH)3固化剂都有良好的活性寿命;而以α-巯基乙酸为原料制备得到的聚酯型聚硫醇P(SH)4固化剂存在活性下降的问题,2个月后完全失活.通过红外光谱、1 H-NMR表征活性下降前后其基团的变化提出了可能导致其活性下降的机理及解决的方法.The lifetime differences of polyether polymercaptans and two kinds of polyester polymercaptans were compared in this paper.The lifetime of polymercaptans curing agents was characterized by FT IR,1 H-NMR and gelation time.The results revealed that polyester polymercaptans P（SH）6 and polyether polymercaptans P（SH）3 composed of 3-mercaptopropionic acid showed a long lifetime when using trialkylamine as accelerator, while polyester polymercaptans P （SH）4 composed of 2-mercaptopropionic acid showed a decrease in curing activity and deactivated within two months.Possible mechanism of the decrease in curing activity was proposed based on the investigation of group changes during the deactivation by FT-IR and 1 H-NMR.

关 键 词：聚酯型聚硫醇 聚醚型聚硫醇 季戊四醇巯基乙酸酯 活性寿命 

分 类 号：O631[理学—高分子化学]