聚烯烃膜表面氯化原位接枝改性及其环境响应性的探索研究

发布时间：2018-04-15 10:02

本文选题：聚烯烃膜 + 氯化原位接枝　；参考：《青岛科技大学》2015年硕士论文

【摘要】：随科学的发展和社会进步,聚烯烃膜材料应用逐渐增多,但聚烯烃缺乏活性反应基团导致其应用受到极大限制,研究者通常采用表面物理或化学改性来改善此问题。物理改性不够稳定,所以化学改性为表面改性主要途径,这其中又以接枝改性为主。改性实施方法大多为溶剂法和熔融法,气固相法制备相对较少。论文首次将一种新的方法-氯化原位接枝,运用到聚烯烃膜进行表面接枝改性。氯化原位接枝(ISCGC)过程是在气-固相反应中,在聚烯烃膜表面形成了独特结构的聚合物,具有聚合物刷的典型特征。通过ISCGC法,许多可自由基聚合的单体可以成功接枝到聚烯烃膜表面；膜表面可获得支链分子量分布比较窄,接枝密度高的聚合物：具有明显的环境响应性。文中对分别对甲基丙烯酸甲酯(MMA)、丙烯酸缩水甘油酯(GMA)、丙烯酸-2-羟乙酯(HEA)在PE膜上的表面修饰,以及MMA、丙烯酸(AA)、丙烯酰胺(AM)对PP膜的表面修饰进行了探讨。重点研究了MMA对PP膜的氯化原位接枝,其产物记为CPP-cg-MMA。对于CPP-cg-MMA,不仅对制备过程进行了详细讨论,同时采用NMR、FTIR、AFM、XPS、SEM、GPC、DSC、接触角及其它手段等对膜表面结构进行了十分细致的表征。实验结果表明,CPP-cg-MMA产物仅存在于表面60nm以上；CPP-cg-MMA有诱导重结晶的趋势；反应较短时间,如2小时,接枝密度质量覆盖率可达到2.67g/m2; PP膜被表面修饰后,不仅具有PH响应性,还具有一定的溶剂响应性,可证明其为环境响应性产物。
[Abstract]:With the development of science and social progress, the application of polyolefin membrane materials is increasing gradually, but the application of polyolefin is greatly limited due to the lack of reactive groups. Researchers usually use surface physical or chemical modification to improve this problem.Physical modification is not stable, so chemical modification is the main way of surface modification, in which graft modification is the main way.Most of the modification methods are solvent method and melting method, and the gas-solid method is relatively few.In this paper, a new method, chlorinated in situ grafting, was first applied to the surface modification of polyolefin films.The in-situ chlorinated graft polymerization (ISCGC) process is characterized by the formation of polymer with unique structure on the surface of polyolefin membrane in gas-solid phase reaction, which has the typical characteristics of polymer brush.By ISCGC, many free radical polymerizable monomers can be successfully grafted onto the surface of polyolefin membrane, and the polymer with narrow molecular weight distribution of branched chain and high grafting density can be obtained on the surface of the membrane.The surface modification of methyl methacrylate (MMA), glycidyl acrylate (GMAA), 2-hydroxyethyl acrylate (HEA) on PE film and the surface modification of PP film by MMA, AA, AM) were studied.The in-situ chlorination grafting of PP membrane with MMA was studied, and the product was described as CPP-cg-MMA.The preparation process of CPP-cg-MMAwas discussed in detail, and the surface structure of the membrane was characterized by NMR-FTIR, AFMS-SEMGPC-DSCS, contact angle and other means.The experimental results show that the CPP-cg-MMA products only exist on the surface of 60nm and have the tendency of inducing recrystallization, the mass coverage of grafting density can reach 2.67 g / m ~ (2) when the reaction time is relatively short, such as 2 hours, and the PP film is not only PH responsive when modified on the surface, but also on the surface of CPP-cg-MMA.It also has a certain solvent responsiveness, which can be proved to be an environmental responsive product.
【学位授予单位】：青岛科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：O632.12;TB383.2

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