CR/AA二元接枝改性胶粘剂的研制

Synthesis of Graft Copolymerization Adhesive of Neoprene and AA

以丙烯酸（AA）为接枝单体，甲苯、乙酸乙酯为溶剂，BPO为引发剂，在氯丁橡胶（CR）上进行接枝共聚-制备出CR／AA二元接枝共聚物（CR-g-AA）胶粘剂．探讨了反应温度、反应时间、原料配比和引发剂用量等对接枝率和产物性能的影响，并用TG／DSC对接枝共聚物进行了表征．结果表明，反应温度85℃、反应时间4h、引发剂用量为CR质量的0．9％～1．2％、CR与AA的质量比为15／100时，单体转化率达到70％、接枝率为56．8％，产物的180°剥离强度达到5．7kN．m^-1．

The graft copolymer C R/AA was prepared on C R initiated by BPO,with AA as graft monomer, toluene and ethyl acetate as solvent. The graft copolymer was characterized by TG/DSC. The influences of reaction temperature,reaction time, CR/AA ratio and amount of BPO on grafting ratio and properties of product were discussed. The optimal condition is proved by experiment as follows： the reaction temperature 85 ℃, reaction time 4.0 h, the mass ratio of AA and CR 15： 100,the mass ratio of initiator and CR 0.9% - 1.2%. The conversion ratio and grafting ratio of monomer were 70% and 56.8% , the 180° peeling strength of graft copolymer adhesive was 5.7 kN·m^-1.