文献类型：期刊文献

英文题名：Stress relaxation of composites made of polypropylene and organo-montmorillonite modified wood flour during water immersion

作者：Liu, Ru[1] Cao, Jinzhen[2] Chen, Yu[2]

第一作者：刘如

通信作者：Liu, R[1];Cao, JZ[2]|[a0005be6e90476f57c0e3]刘如;

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China;[2]Beijing Forestry Univ, MOE Key Lab Wooden Mat Sci & Applicat, Qinghua East Rd 35, Beijing 100083, Peoples R China

年份：2017

卷号：71

期号：2

起止页码：163-170

外文期刊名：HOLZFORSCHUNG

收录：;EI(收录号：20170703340306);Scopus(收录号：2-s2.0-85011915266);WOS:【SCI-EXPANDED(收录号:WOS:000394124800008)】；

基金：This study was financially supported by the Fundamental Research Funds for the central Universities of China (No. 2015ZCQ-CL-01).

语种：英文

外文关键词：didecyl dimethyl ammonium chloride (DDAC); interfacial compatibility; organo-montmorillonite (OMMT); polypropylene (PP); sodium-montmorillonite (Na-MMT); stress relaxation; wood flour (WF); wood-plastic composites (WPCs)

摘要：Wood flour (WF) was modified with sodium-montmorillonite (Na-MMT) and didecyl dimethyl ammonium chloride (DDAC) to form an organo-montmorillonite (OMMT) inside WF at different OMMT concentrations from 0.25 to 1%. The modified WF was blended with polypropylene (PP) to produce PP/WF composites at a weight ratio of 1:1 by compression molding. The composites were immersed in water and their stress relaxation behaviors were investigated at 26, 40, and 60 degrees C, respectively. Results: (1) All composites show stress relaxation with increasing compression testing time, indicating that they have pronounced rheological properties. (2) The stress relaxation becomes more severe with increasing temperature and water immersion time. (3) OMMT improves the stiffness of the composites with slower stress relaxation, and the PP/WF 0.5% OMMT seems to perform best among all.