高稳定性的丙烯酸酯-偏氯乙烯共聚物的制备及结晶性表征  

Preparation and Crystallization Characterization of Acrylate-vinylidene Chloride Copolymers with High Stability

作　　者：林泽中 刘天宇 肖楠 李茂林 祝司政 LIN Ze-zhong;LIU Tian-yu;XIAO Nan;LI Mao-lin;ZHU Si-zheng(Qinghai Key Laboratory of Applied Physical Chemistry,School of Chemistry and Chemical Engineering,Qinghai Minzu University,Xining 810007,China)

机构地区：[1]青海民族大学化学化工学院,青海省应用物理化学重点实验室,西宁810007

出　　处：《高分子通报》2024年第9期1300-1308,共9页Polymer Bulletin

基　　金：青海省重点研发与转化计划(项目号2022-QY-210);天津大学与青海民族大学盐湖专项联合基金(项目号30447)。

摘　　要：在丙烯酸酯-偏氯乙烯半种子乳液聚合中,通过引入可逆加成断裂转移(RAFT)试剂,可以原位产生大分子乳化剂,进而部分替代小分子乳化剂,从而制备高稳定性的共聚物乳液。研究了乳液聚合过程中各类助剂及引发剂的最佳加入量,并研究了不同丙烯酸酯单体和偏氯乙烯(VDC)单体共聚竞聚率对乳液聚合的影响。成功合成了丙烯酸甲酯-偏氯乙烯(VDC-MA)、丙烯酸乙酯-偏氯乙烯(VDC-EA)和丙烯酸丁酯-偏氯乙烯(VDC-BA)系列共聚物,并利用傅里叶红外光谱(FTIR)和X射线衍射(XRD)表征了共聚物薄膜的结晶性,因其结晶性而导致共聚物薄膜具有优异的阻隔性能,为其在包装领域的应用提供了理论支撑。In acrylate-vinylidene chloride semi-seed emulsion polymerization,macromolecular emulsifiers can be produced in situ by introducing reversible addition fragmentation chain transfer(RAFT)reagents,and then partially replace small molecular emulsifiers,and thus high stability copolymer emulsions can be prepared.The optimum addition amount of various additives and initiators in emulsion polymerization was studied,and the effect of different acrylate monomers and VDC monomer copolymerization on emulsion polymerization was studied.Methyl acrylate-vinylidene chloride(VDC-MA),ethyl acrylate-vinylidene chloride(VDC-EA)and butyl acrylate-vinylidene chloride(VDC-BA)copolymers have been successfully synthesized.The crystallinity of copolymer films having excellent barrier properties are characterized by Fourier infrared spectroscopy(FTIR)and X-ray diffraction(XRD),which provided theoretical support for the application of copolymer in packaging fields.

关 键 词：偏氯乙烯 乳液 共聚物 结晶性 

分 类 号：TQ317[化学工程—高聚物工业]