偏氯乙烯-丙烯腈悬浮共聚树脂的颗粒特性  

Particle Characteristics of Vinylidene Chloride-Acrylonitrile Copolymers Prepared by Suspension Polymerization

作　　者：谢建武[1,2] 包永忠[1] 张静天[1] 黄志明[1] 

机构地区：[1]浙江大学化学工程与生物工程学系,化学工程联合国家重点实验室,浙江杭州310027 [2]杭州职业技术学院化工系,浙江杭州310018

出　　处：《化学反应工程与工艺》2010年第4期350-354,共5页Chemical Reaction Engineering and Technology

基　　金：教育部新世纪优秀人才支持计划(NCET-07-0738)

摘　　要：采用悬浮聚合制备偏氯乙烯(VDC)均聚树脂和偏氯乙烯-丙烯腈共聚(VDC-AN)树脂,考察了AN含量对VDC-AN树脂颗粒形态和结晶特性的影响。结果表明,随着AN含量的增加,VDC-AN树脂颗粒形态逐渐由疏松结构向致密结构变化。当AN的质量分数小于或等于8.8%时,共聚树脂具有疏松的颗粒结构,颗粒内部有0.1～2.0 μm的初级粒子间孔隙;当共聚物中AN的质量分数大于或等于12.3%时,颗粒内部初级粒子黏并严重,初级粒子间孔隙基本消失,且共聚树脂基本不结晶。AN单体的引入,使VDC聚合物结晶性下降,单体对聚合物的溶胀性增加,是VDC树脂颗粒由疏松向致密结构转变的主要原因。Vinylidene chloride （VDC） homopolymer and vinylidene chloride-acrylonitrile （VDCAN） copolymers were prepared by suspension polymerization process, and the influence of AN content on the particle characteristics and crystallinity of VDC polymers was investigated. It was found that the particles of VDC resins were varied from porous to compact morphology with the increase of mass fraction of AN in polymers. When the mass fraction of AN in copolymer was equal to or less than 8.8%, the internal pore size of VDC-AN copolymer was 0. 1-2.0 μm; when the mass fraction of AN was equal to or more than 12.3%, the primary particles were coagulated together, the pore space among the particles was almost disappeared and the VDC-AN copolymer was hardly crystallized. The increase of AN monomer in VDC-AN copolymers led to the decrease of crystallinity of VDC-AN polymers and the increase of the swelling ability of AN monomer in copolymers, which was the main reason why the structure of VDC and particles became compact.

关 键 词：偏氯乙烯 丙烯腈 悬浮聚合 颗粒特性 

分 类 号：TQ316.335[化学工程—高聚物工业]