聚氨酯–聚丙烯酸丁酯嵌段共聚物的合成及压敏性研究  

Study on synthesis and pressure sensitivity of polyurethane-poly(butyl acrylate) block copolymer

作　　者：刘鑫[1] 薛鹏 崔志超 寇亮亮 程珏[1] 张军营[1] Liu Xin;Xue Peng;Cui Zhichao;Kou Liangliang;Cheng Jue;Zhang Junying(Key Laboratory of Carbon Fiber and Functional Polymers,Ministry of Education, Beijing University of Chemical Technology,Beijing 100029,China;AVIC Xi'an Flight Automatic Control Research Institute,Xi'an 710000,China)

机构地区：[1]北京化工大学碳纤维及功能高分子教育部重点实验室,北京100029 [2]中国航空工业集团公司西安飞行自动控制研究所,陕西西安710000

出　　处：《化学推进剂与高分子材料》2019年第1期33-39,共7页Chemical Propellants & Polymeric Materials

摘　　要：以4, 4'–偶氮双(4–氰基戊醇)为原料,通过与聚氨酯预聚物的反应制备了聚氨酯大分子引发剂。采用聚氨酯大分子引发剂引发丙烯酸丁酯自由基聚合制备了一系列不同相对分子质量的聚氨酯–聚丙烯酸丁酯嵌段共聚物,并对其压敏性进行了研究。结果表明:压敏胶的初黏性随聚丙烯酸丁酯含量的增加而增大;在初黏性和内聚强度的双重影响下,持黏性随聚丙烯酸丁酯含量的增多呈现先增大后减小的趋势;在初黏性和聚氨酯含量的共同作用下,180°剥离强度随聚丙烯酸丁酯含量的增多呈现先增大后减小的趋势。The polyurethane macromolecular initiator was prepared by using 4,4’-azobis(4-cyano-1-pentanol) as raw material and its reaction with the polyurethane prepolymer. A series of polyurethane-poly(butyl acrylate) block copolymers with different relative molecular mass were prepared by the free radical polymerization of butyl acrylate initiated with the polyurethane macro-initiator, and their pressure sensitivity was investigated. The results show that the initial adhesion of the pressure-sensitive adhesive increases with the increase of poly(butyl acrylate) content. Under the dual influence of the initial adhesion and the cohesive strength, the persistent adhesion exhibits the trend of first increasing and then decreasing with the increase of the poly(butyl acrylate) content. Under the combined action of initial adhesion and the polyurethane content, the 180° peel strength exhibits the trend of first increasing and then decreasing with the increase of the poly(butyl acrylate) content.

关 键 词：大分子引发剂 聚氨酯 聚丙烯酸丁酯 嵌段共聚物 压敏性 

分 类 号：TQ436.3[化学工程]