文献类型：期刊文献

英文题名：Role of the Soft and Hard Segments Structure in Modifying the Performance of Acrylic Adhesives Modified by Polyurethane Macromonomers

作者：Zhu, Ao[1];Shi, Lucheng[1];Shi, Haoran[1];Qian, Jun[1];Shi, Yifeng[2]

机构：[1]East China Univ Sci & Technol, Minist Educ, Sch Mat Sci & Engn, Key Lab Specially Funct Polymer Mat & Related Tech, Shanghai 200237, Peoples R China;[2]Shanghai Hongdingfang Sci Co Ltd, Shanghai 200237, Peoples R China

年份：2024

卷号：9

期号：30

起止页码：32735

外文期刊名：ACS OMEGA

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001272008500001)】；

基金：The authors would like to acknowledge the research platform of the East China University of Science and Technology and the financial support from Shanghai Hong Dingfang Science Co., Ltd. (Shanghai, China).

语种：英文

摘要：Acrylic pressure sensitive adhesives, modified by polyurethane (PU), achieve selective optimization through the designability of polyurethanes. In this paper, PU macromonomers were prepared by a two-step synthesis method, using polypropylene glycol or polyethylene glycol with different molecular weights as soft segments and different types of diisocyanates: isophorone diisocyanate, hexamethylene diisocyanate, dicyclohexylmethylmethane diisocyanate (HMDI), 2,4-toluene diisocyanate (TDI), and 4,4 '-diphenylmethane diisocyanate (MDI) and chain extenders as hard segments. After being terminated by capping agents, a series of PU macromonomers of different molecular weights and structures were obtained and used to modify the acrylic base adhesives. Compared to unmodified adhesives, acrylic adhesives modified by PU macromonomers have improved adhesion performances and heat resistance and show an increasing trend with the increase of molecular weight of diols. Diols with a molecular weight of 600 have the best effect. Diisocyanates containing benzene rings can better improve the thermal performance of adhesives, where P-MDI containing a biphenyl ring is the best, while aliphatic isocyanate groups have a greater improvement in adhesion performance, and the adhesion performance of P(HDI )with a long carbon chain is the best.