文献类型：期刊文献

英文题名：Preparation of Desirable Porous Cell Structure Polylactide/Wood Flour Composite Foams Assisted by Chain Extender

作者：Wang, Youyong[1];Song, Yongming[1];Du, Jun[1];Xi, Zhenhao[2];Wang, Qingwen[3]

机构：[1]Northeast Forestry Univ, Minist Educ, Key Lab Biobased Mat Sci, Harbin 150040, Heilongjiang, Peoples R China;[2]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[3]South China Agr Univ, Coll Mat & Energy, Guangzhou 510642, Guangdong, Peoples R China

年份：2017

卷号：10

期号：9

外文期刊名：MATERIALS

收录：;EI(收录号：20173504103916);WOS:【SCI-EXPANDED(收录号:WOS:000411506700018)】；

基金：This work was financially supported by the Fundamental Research Funds for the Central Universities (Grant No. 2572017CB15); National Natural Science Foundation of China (Grant No. 31100425); Scientific Research Foundation of Heilongjiang for returned Scholars (Grant No. LC2015011); China Postdoctoral Science Foundation (Grant No. 2014T70303).

语种：英文

外文关键词：chain extender; polylactide; wood flour; melt strength; crystallization; foams

摘要：Polylactide (PLA)/wood flour composite foam were prepared through a batch foaming process. The effect of the chain extender on the crystallization behavior and dynamic rheological properties of the PLA/wood flour composites were investigated as well as the crystal structure and cell morphology of the composite foams. The incorporation of the chain extender enhanced the complex viscosity and storage modulus of PLA/wood flour composites, indicating the improved melt elasticity. The chain extender also led to a decreased crystallization rate and final crystallinity of PLA/wood flour composites. With an increasing chain extender content, a finer and more uniform cell structure was formed, and the expansion ratio of PLA/wood flour composite foams was much higher than without the chain extender. Compared to the unfoamed composites, the crystallinity of the foamed PLA/wood flour composites was improved and the crystal was loosely packed. However, the new crystalline form was not evident.