摘要
采用原子转移自由基(ATRP)活性聚合方法在多壁碳纳米管(MWNT)表面接枝丙烯酸丁酯聚合物(PBA),并以接枝聚合物MWNT-PBA对聚丙烯(PP)进行改性。红外光谱(FT-IR)及透射电子显微镜(TEM)测试结果表明,采用ATRP法成功地将PBA接枝到MWNT表面上。利用差示扫描量热仪(DSC)对PP/MWNT复合材料的非等温结晶动力学进行了研究。结果表明,PP/MWNT复合材料中由于MWNT的加入明显地提高了复合材料的结晶温度和结晶速率,并降低了结晶活化能。MWNT-PBA和MWNT-COOH(酸化MWNT)加入PP都有异相成核的作用,而MWNT-PBA比MWNT-COOH的作用更加明显。
PBA was grafted onto the surface of MWNT via atom transfer radical polymerization （ATRP） ,and MWNT-PBA was applied to modify PP. The results of FT-IR spectra and TEM show that PBA is grafted onto the surfaces of MWNT successfully. The crystallization kinetics of PP/MWNT nanocomposites are also studied by DSC. The results indicate that the crystallization rate and crystallization temperature of PP/MWNT nanocomposites are increased obviously by adding of MWNT,and the activation energy of crystallization of the nanocomposites is reduced. Moreover both MWNT-PBA and MWNT-COOH have heterogeneous nucleation effect,MWNT-PBA more apparently.
出处
《现代塑料加工应用》
CAS
北大核心
2010年第3期46-49,共4页
Modern Plastics Processing and Applications
基金
国家自然科学基金(项目号5573016)资助
关键词
聚丙烯
多壁碳纳米管
原子转移
自由基聚合
聚丙烯酸丁酯
纳米复合材料
结晶动力学
polypropylene
multiwalled carbon nanotubes
atom transfer
radical polymerization
polybutyl acrylate
nanocomposites
crystallization kinetics
