PP-g-MA增容rPET/β-PP共混物中的β-成核作用  

β-nucleation of recycled PET/β-PP blends compatibilized with PP-g-MA

作　　者：章自寿[1] 张均萍[1] 潘永兴[1] 王春广[1] 麦堪成[1] 

机构地区：[1]中山大学化学学院材料科学研究所教育部聚合物基复合材料及功能材料重点实验室,广东广州510275

出　　处：《材料研究与应用》2010年第4期679-684,共6页Materials Research and Application

基　　金：国家基金(50873115);广东省科技计划重点项目(2008A010500003);广东省重大科技专项项目(2010A080804021);高等学校博士生学科点专项科研基金项目

摘　　要：为降低rPET对PP的β-成核作用影响和提高共混物的β-PP含量,采用不同方法制备了PP-g-MA增容rPET/β-PP共混物,用DSC研究了不同制备方法、PP-g-MA与rPET用量、熔融温度及时间,升降温速率等对增容共混物中PP的β-成核作用影响.结果表明,在rPET已结晶的PP熔体中加入相容剂和β-CC,可制备高含量β-晶的PP/rPET共混物.虽然加入rPET降低了β-PP的β-成核作用,但加入PP-g-MA可明显提高共混物中PP的β-成核作用和β-晶含量.熔融温度高、熔融时间长和降温速率快,有利于形成β-晶.In order to decrease the effect of recycled PET on β-nucleation and increase the content of β-PP in the recycled PET/β-PP blends,the recycled PET/β-PP blends compatibilized with PP-g-MA were prepared by different methods. The effect of the preparation method,the content of PP-g-MA and recycled PET,melting temperature and time,as well as cooling rate on β-nucleation in compatibilized β-PP blends were investigated by DSC. The results indicated that the compatibilized blends with high content of β-PP were obtained by adding of β-nucleating agent and PP-g-MA into PP melt in which the PET has crystallized. Although addition of recycled PET decreased the β-nucleation of β-PP,PP-g-MA significantly increased the β-nucleation and content of β-PP in recycled PET/β-PP blends. The increased melting temperature and time,as well as cooling rate would increase the β-nucleation and the content of β-PP in recycled PET/β-PP blends.

关 键 词：β-PP β-成核作用 rPET 增容共混物 

分 类 号：O63[理学—高分子化学]