高氯聚合物对MMA与CR接枝共聚的影响

EFFECT OF HIGH CHLORINE CONTENT POLYMER ON THE GRAFT COPOLYMERIZATION OF MMAONTO CR

以合成改性氯丁胶粘剂为目的,研究了聚氯乙烯(PVC),氯化聚乙烯(CPE),氧化橡胶(CLR)及氧化聚氯乙烯(CPVC)等高氯聚合物(HCCP)对甲基丙烯酸甲酪与氯丁橡胶接枝共聚反应的影响。结果表明,HCCP能加快反应速率,提高接枝效率,并可引起产物形态的变化。加快反应速率的能力随HCCP中的β-H原子的增加而提高,其顺序为PVC>CPE>CLR>CPVC。与未加HCCP的接枝产物相比,HCCP能将产物的拉伸强度从14.9MPa提高到18.9—26.4MPa,撕裂强度从56.9kN/m提高到76.2—96.3kN/m,粘接强度从1.7kN/m提高到2.7—3.7kN/m。

The effect of polyvinyl chloride (PVC),chlorinated polyethylene (CPE),chlorinated rubber (CLR), chlorinated polyvinyl chloride (CPVC) high chlorine content polymer (HCCP) on the graft copolymerization of methyl methacrylate (MMA)onto polychloroprene (CR)was investigated for synthesizing modified CR adhesive . The results showed that the introduction of HCCP into the graft copolymerization system could allow the process to be carried out at high rates ,increase the graft efficiency and change the morphology of the resultant polymers . The ability to accelerate the reaction rate increased with the increase of the numbers of β-H atoms of HCCP , and its order was : PVC > CPE > CLR> CPVC . The resultant polymers containing HCCP had tensile strength 18.9- 26.4 MPa , tear strength 76.2- 96.3 kN/m and binding strength 2.7- 3.7 kN/m , compared with resultant polymer without HCCP 14.9 MPa , 56.9 kN/m and 1.7 kN/m , respectively .