PLA/PA1212共混物结构与力学性能研究  

Study on Structure and Mechanical Properties of PLA/PA1212 Blends

作　　者：宋剑斌[1] 张文研[1] 张敦普[1] 黄文娟[1] 陆春华[1] 许仲梓[1] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009

出　　处：《塑料工业》2011年第12期19-21,共3页China Plastics Industry

基　　金：国家自然科学基金项目(No.20901040/B0111);江苏省创新学者攀登项目(No.SBK200910148)

摘　　要：通过熔融共混法制备了不同比例的聚乳酸/尼龙1212(PLA/PA1212)共混物。采用X射线衍射仪(XRD)、差示扫描量热仪(DSC)、傅里叶变换红外光谱仪(FTIR)和万能材料试验机等对共混物结构、热行为和力学性能等进行了表征。XRD和FTIR分析证实PLA和PA1212分子间发生了酯-酰胺交换反应,生成了某种新的结构;DSC结果表明共混材料在升温过程中出现冷结晶和复杂的多重熔融行为;经PA1212改性后,PLA的韧性得到提高,但是拉伸强度有所下降。The PLA/PA1212 blends with different ratio, produced by melt blending method, were investigated on structure, thermal behaviors and mechanical properties by using XRD, DSC, FFIR and universal testing machine in detail. The results of XRD and FYIR proved that ester-amide exchange reaction happened between PLA and PAl212 and a new structure formed; the blends showed cold crystallization and complicated multi-melting behaviors on heating in DSC; after modified with PAl212, the toughness of PLA was improved, but tensile strength descended as PAl212 content increased.

关 键 词：共混物 聚乳酸 尼龙1212 热行为 力学性能 

分 类 号：TB332[一般工业技术—材料科学与工程]