木纤维-聚乳酸复合材料性能与聚乳酸性能的相关性  

Properties Relation Between WF-PLA Composites and Poly(Lactic Acid)

作　　者：郭文静[1] 鲍甫成[1] 王正[1] 

机构地区：[1]中国林业科学研究院木材工业研究所,北京100091

出　　处：《高分子材料科学与工程》2010年第2期62-65,共4页Polymer Materials Science & Engineering

基　　金："十一五"国家科技支撑计划课题(2008BADA9B01);中国林业科学研究院中央级公益性科研院所基本科研业务费专项资金项目(CAFINT2007C02)

摘　　要：用高速混合-平板热压法制备了70%木纤维含量的木纤维-聚乳酸(WF-PLA)复合材料,研究了不同聚乳酸(PLA)对WF-PLA复合材料的耐水性、弯曲强度和弯曲模量、PLA分子量及热性能的影响。结果表明,PLA与木纤维复合后,弯曲模量明显增加,复合材料中PLA分子量和熔融温度明显下降;PLA性能对WF-PLA复合材料性能影响显著,WF-PLA复合材料中PLA分子量随PLA原料分子量下降而下降,高分子量PLA制备的WF-PLA复合材料耐水性更好,弯曲强度和弯曲模量更高;在PLA改性时,应避免引起PLA分子量下降。The poly（lactic acid）-wood fiber （WF-PLA） composites with 70% WF were prepared by high super mixing-flat hot press. Water resistance, flexural strength and modulus, molecular weight and thermal properties of different WF-PLA composites were tested and compared. The results indicate that when PLA combined with WF, flexural modulus improves, but molecular weight and Tm of PLA decrease. PLA has a significant effect on the properties of WF-PLA composites. The molecular weight of PLA in WF-PLA composites decreases with molecular weight of PLA raw materials decreases. The water resistance, flexural strength and modulus of WF-PLA composites are better when prepared with higher molecular weight PLA. PLA molecular weight decreasing should be avoided when PLA is modified in WF-PLA composites.

关 键 词：聚乳酸 生物质复合材料 木纤维 弯曲强度 分子量 热性能 

分 类 号：O636.9[理学—高分子化学]