【作者】 戴洪湖； 陈枫； 杨晋涛； 费正东； 钟明强；

【Author】 Honghu Dai,Feng Chen,Jintao Yang,Zhengdong Fei,Mingqiang Zhong~* (Institute of Polymer Materials and Engineering,Zhejiang University of Technology,Hangzhou 310014)

【机构】 浙江工业大学；

【摘要】 <正>木质素(Lignin)是一种储量丰富,可再生的重要资源,开发利用木质素资源具有重要的战略意义,聚烯烃/木质素复合材料近年来已成为热点课题之一。木质素填充改性聚烯烃必须解决两者相容性不佳的问越。本文用溴代十二烷接枝改性木质素,并以此为原料成功的更多还原

【Abstract】 Recently,Polyolefin/ Lignin composites is one of the ho:topics in materials science.The compatibility of polypropylene(PP) with lignin was enhanced greatly when the lignin was grafted with dodecyl bromide,and PP/ modified lignin composites containing 70 wt%content of lignin were successfully prepared.The influence of the lignin content on the mechanical properties,thermal stability and microstructure in PP/ lignin composites were studied systemically.Micrographs for the composites showed that the dimension of the alkylated lignin domains with 20 wt%modified lignin were symmetrical.As the sample containing 70 wt%lignin,the morphology of the composite trended to interpenetrating network.The results showed that the impact and flexual strength of PP/ modified lignin composites was essentially unchanged with increasing lignin content,but the tensile was declined.This is due to the limitations of the mechanical properties of lignin.Dynamic mechanical analysis(DMA) results showed that the tanδpeaks by addition of modified lignin were shifted toward slightly higher temperatures compared with the neat PP,the stress field surrounding the particles induces the shift in the T_g.Thermogravimetry(TG) analysis showed that lignin enhanced the heat-resistant of PP matrix,and the heat-resistant of composites became better.更多还原