亚临界二甲醚协助双单体固相接枝改性聚丙烯

以亚临界二甲醚为溶胀剂,偶氮二异丁腈(AIBN)为引发剂,在聚丙烯(PP)上接枝甲基丙烯酸缩水甘油酯(GMA)和苯乙烯(St),制备了接枝产物PP-g-(GMA-co-St)。考察了溶胀时间、溶胀温度、反应时间、反应温度、St用量和引发剂用量对接枝产物相对接枝率和水接触角的影响。采用傅里叶变换红外光谱对接枝产物进行定量分析,以表征相对接枝率的大小。结果表明:当溶胀时间3 h,溶胀温度55℃,反应时间3 h,反应温度85℃,m(PP)∶m(GMA)∶m(St)∶m(AIBN)=100.0∶10.0∶10.0∶0.6时,接枝产物PP-g-(GMA-co-St)的相对接枝率为5.86%,水接触角为67.19°。

Subcritical dimethyl ether assisted solid-state grafting process of double monomers onto PP

Subcritical dimethyl ether was used as swelling agent and 2,2′-azobis(isobutyronitrile)(AIBN)as initiator to graft glycidyl methacrylate(GMA)and styrene(St)onto polypropylene(PP)to prepare PP-g-(GMA-co-St).The effects of the swelling time and temperature,reaction time and temperature,the amounts of St and the initiator on the relative grafting ratio and contact angle of the grafted product were observed.The grafted product was characterized by Fourier transform infrared spectroscope to determine the relative grafting ratio.The results show that the relative grafting ratio and contact angle of the product reach 5.86% and 67.19°when the swelling time is 3 hours,the swelling temperature is 55℃,the reaction time is 3 hours,the reaction temperature is 85℃,and the mass ratio of PP,GMA,St,AIBN is 100.0,10.0,10.0,0.6 respectively.