废旧丁腈橡胶粉/聚丙烯复合材料的非等温结晶行为  

Nonisothermal crystallization behavior of waste nitrile rubber powder/polypropylene composites

作　　者：李军伟[1] 刘志华[1] 

机构地区：[1]天津城市建设学院材料科学与工程学院,天津300384

出　　处：《合成橡胶工业》2012年第4期276-280,共5页China Synthetic Rubber Industry

基　　金：住房和城乡建设部项目(2011-k 4-15);天津市建设系统软课题研究项目(2010-软6)

摘　　要：采用熔融共混法制备了废旧丁腈橡胶粉/聚丙烯(WNBR/PP)和废旧丁腈橡胶粉/聚丙烯接枝马来酸酐/聚丙烯(WNBR/PP-g-MAH/PP)复合材料,采用差示扫描量热仪研究了PP、WNBR/PP及WNBR/PP-g-MAH/PP复合材料的非等温结晶过程,并通过Jeziorny方程研究了复合材料的非等温结晶动力学。结果表明,随降温速率的增大,所有试样的结晶峰温和结晶起始温度均向低温偏移,结晶度减小,结晶速率增大。WNBR能起到异相成核的作用,提高了PP的结晶速率,并且导致PP结晶成核和生长机理发生改变。The composites of waste nitrile rubber powder/polypropylene and waste nitrile rubber pow- der/polypropylene grafted maleic anhydride/polypro- pylene were prepared by melt extrusion. The noniso- thermal crystallization behavior of polypropylene, waste nitrile rubber powder/polypropylene and waste nitrile rubber powder/polypropylene grafted maleic anhydride/polypropylene composites were investiga- ted using differential scanning calorimetry. The non- isothermal crystallization kinetics of the samples were analyzed by Jeziorny equation. The results showedthat the crystallization peak temperature, initial crystallization temperature and crystallinity of the samples decreased, but the crystallization rate in- creased with increasing the cooling rate. The waste nitrile rubber powder could increase the crystalliza- tion rate of polypropylene and led to the changes in the mechanisms of crystal nucleation and growth due to its heterogeneous nucleation.

关 键 词：废旧丁腈橡胶粉 聚丙烯 聚丙烯接枝马来酸酐 非等温结晶动力学 

分 类 号：TB332[一般工业技术—材料科学与工程]