聚乳酸/环氧基笼型倍半硅氧烷纳米复合材料的流变性能研究  

Study on Rheological Property of PLA/Epoxied Polyhedral Oligomeric Silsesquioxanes(EVOS) Nanocomposites

作　　者：马建莉[1] 郭威男[1] 林杉[2] 陈春银[1] 王标兵[1,3] 

机构地区：[1]中北大学材料科学与工程学院,山西太原030051 [2]中北大学理学院,山西太原030051 [3]常州大学材料科学与工程学院,江苏常州213164

出　　处：《塑料科技》2012年第1期72-75,共4页Plastics Science and Technology

摘　　要：采用毛细管流变仪分析了熔融共混法制备的聚乳酸/环氧基笼型倍半硅氧烷（PLA/EVOS）纳米复合材料的流变行为。结果表明：PLA/EVOS纳米复合材料为假塑性流体,呈现出切力变稀的特征;随着温度的升高,复合材料的非牛顿指数有所提高;随着EVOS含量的增加,复合材料的非牛顿指数先升后降,而稠度和表观黏度先减小后增大;复合材料熔体的黏流活化能相对较低,仅为12~35 kJ/mol。The rheological behavior of poly（lactic acid）（PLA）/epoxied polyhedral oligomeric silsesquioxanes（EVOS） nanocomposites prepared by melt blending method was investigated by capillary rheometer.The results show that PLA/EVOS nanocomposites are pseudo plastic fluid,and exhibit shear thinning behavior;with the increase of temperature,the non-newtonian index of the composite increases;with the increase of EVOS content,the non-newtonian index of the composite increases at first and then decreases,while both consistency and apparent viscosity decrease at first and then increase;the viscous activation energy of the composite melt is relatively low,which is only 12~35 kJ/mol.

关 键 词：聚乳酸 环氧基笼型倍半硅氧烷 纳米复合材料 流变性能 

分 类 号：TB383.1[一般工业技术—材料科学与工程]