PP-g-AA接枝共聚物的制备及表征  

Preparation,Structure and Properties of PP-g-AA Grafting Copolymers

作　　者：蔡传伦[1] 石强[1] 李莉莉[1] 尹立刚[1] 唐功本 殷敬华[1] 

机构地区：[1]高分子物理与化学国家重点实验室,中国科学院长春应用化学研究所,长春130022

出　　处：《应用化学》2007年第7期737-741,共5页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金重大项目(50290090)资助

摘　　要：以部分预辐照聚丙烯(rPP)作为聚丙烯反应挤出接枝丙烯酸(AA)的引发剂,制备了PP-g-AA接枝共聚物。考察了预辐照剂量、预辐照聚丙烯用量以及单体浓度等因素对接枝反应的影响。采用红外光谱、差热扫描量热仪和偏光显微镜等测试技术对接枝产物的形态、结构及性能进行了研究。结果表明,这种新的PP-g-AA共聚物制备方法能有效抑制聚丙烯的降解并获得较高力学性能的接枝产物。研究发现,当rPP的预辐照剂量为4 kGy,反应原料的组成为m(PP)∶m(rPP)∶m(AA)=90∶10∶0.8时,得到的产物有较高的接枝率(0.19%),并且具有相对最佳的力学性能;这种接枝产物与铝板有很强的粘接效果,其剥离强度达4.88 kN/m。Polypropylenes grafted with AA were prepared by reactive extrusion with pre-irradiated PP（rPP） as the homogeneous initiator. The effect of pre-irradiated dose, fraction of rPP and concentration of acrylic acid on grafting reaction was studied, and the grafted PP was characterized by means of Fourier transition infrared spectroscopy（ FTIR）, differential scanning calorimetry （DSC） and polarized light microscopy （PLM）. The results show that the degradation of PP was suppressed effectively with this novel method for preparing PP-g- AA copolymers, and grafted copolymers with good mechanical properties were obtained. It was found that the product with higher Gd（0. 19% ） and relatively excellent mechanical properties can be produced if the mass ratio of PP/rPP/AA is 90：10：0.8, where selected preirradiation dose of rPP is 4 kGy. Moreover, an adhesive strength of 4.88 kN/m was reached in the PP-g-AA/aluminium laminate.

关 键 词：聚丙烯 丙烯酸 反应挤出接枝 预辐照 

分 类 号：O631[理学—高分子化学]