摘要
采用熔融共混法制备了不同比例的(0/100,10/90,30/70,50/50,70/30,90/10,100/0)生物基聚乳酸/尼龙11(PLA/PA11)共混物。通过动态力学性能(DMA)测试、XRD分析、扫描电镜(SEM)形貌观察、力学性能测试、红外光谱(IR)分析和分子动力学(MD)模拟研究了PLA/PA11共混物结构与性能的关系。DMA测试和MD模拟均证明任意比例下PLA与PA11为不相容体系,XRD分析表明当PLA/PA11含量为70/30时,PLA会发生一定程度的结晶,SEM结果显示此时两者会出现明显的界面,力学性能最差,MD模拟的结合能和径向分布函数g(r)表明两者会产生一定的氢键相互作用,但氢键作用较小,不足以改善两者的相容性。
Blends of entirely biosourced polymers,namely polylactide(PLA)and polyamide11(PA11),have been prepared by a melt-blending process.Several kinds of PLA/PA11 blends(with different ratio of 0/100,10/90,30/70,50/50,70/30,90/10,100/0)were examined.DMA,XRD,SEM,mechanical properties testing,FT-IR analysis and molecular dynamics(MD)simulations were used to characterize the properties of the PLA/PA11 blends.The DMA analysis and MD simulation results showed that immiscibility prevails in all PLA/PA11 blends.XRD analysis indicated that in the 70/30 PLA/PA11 blends,the PLA component has been crystallized.SEM analysis indicated that there is a distinct interface between the PLA and PA11 in 70/30 PLA/PA11 blend,whose mechanical properties decrease significantly.The binding energy,radial distribution function g(r)obtained from MD simulations results revealed the existence of hydrogen-bonding between PLA and PA11,but the compatibility of PLA/PA11 blends can not be improved by the weak hydrogen bonding.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2018年第2期2024-2028,2034,共6页
Journal of Functional Materials
基金
高等学校博士学科点专项科研基金联合资助项目(20131420120004)
山西省青年科学基金资助项目(201701D221103)
作者简介
杨潞霞（1979-）,女,山西阳城人,博士,副教授,主要从事材料模拟方面的工作.;通讯作者：付一政,E-mail：fuyizheng＠nuc.edu.cn
