高密度聚乙烯表面光接枝丙烯酸行为研究  

Photografting of Acrylic Acid on High Density Polyethyleneby UV Irradiation

作　　者：金朝锋[1] 申屠宝卿[1] 翁志学[1] 

机构地区：[1]浙江大学高分子工程研究所,浙江杭州310027

出　　处：《化学反应工程与工艺》2004年第2期146-150,共5页Chemical Reaction Engineering and Technology

基　　金：国家自然科学基金重点资助项目(39830230)

摘　　要：研究了以二苯甲酮为光敏剂时,紫外光辐照时间、温度、丙烯酸(AA)单体浓度、预覆液中光敏剂浓度等因素对高密度聚乙烯(HDPE)接枝率和接枝效率的影响,以及接枝HDPE膜的接触角与接枝率的关系。随辐照时间延长,HDPE的接枝率增加,4min时的接枝率为15％,膜表面对水的接触角由来接枝时的83°降到36°;随接枝时间的进一步延长,接枝率不断增加,但接触角变化不大。升高温度、增加单体浓度,可以促进接枝反应的进行,使接枝率增加。预覆液中光敏剂浓度也影响HDPE的接枝率和接枝效率。红外光谱(IR)结果表明,HDPE膜表面已接枝了PAA。差热分析(DSC)结果表明,接枝破坏了HDPE的结构规整性,影响其结晶度。The influence of irradiation time, temperature and concentrations of acrylic acid(AA) and benzophenone on the grafting ratio of high-density polyethylene (HDPE) was studied. The relationship between the contact angle and the grafting ratio was also studied. With the increase of the irradiation time, temperature and the concentration of acrylic acid the grafting ratio increased. The concentration of benzophenone as the photo-initiator in the pre-soaked solution also affected the grafting ratio and the grafting efficiency. With the increase of the grafting ratio, the contact angle on grafted HDPE film decreased greatly. Infrared spectroscopy(IR) study revealed the presence of the PAA. Differential Scanning Calorimetry (DSC) showed that the photografting affected the crystalline behavior of HDPE.

关 键 词：丙烯酸 表面光接枝聚合 高密度聚乙烯 二苯甲酮 接触角 接枝率 通用塑料 结晶行为 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业] TQ322.2