TPAS/PLA/PLA-g-MAH共混材料制备及性能  

Preparation and Properties of TPAS/PLA/PLA-g-MAH Blended Materials

作　　者：翟欣 万军民[1] ZHAI Xin;WAN Junming(School of Materials Science&Engineering,Zhejiang Sci-Tech University,Hangzhou 310018,China)

机构地区：[1]浙江理工大学材料科学与工程学院,浙江杭州310018

出　　处：《广州化学》2024年第3期61-65,I0004,共6页Guangzhou Chemistry

摘　　要：使用熔融和注塑工艺制备热塑性醋酸淀粉(TPAS)/聚乳酸(PLA)/聚乳酸接枝马来酸酐(PLA-g-MAH)共混材料,考察PLA-g-MAH的增容效果,并对共混材料的力学性能、热性能、熔体流变性能和亲水性进行分析。结果表明:PLA-g-MAH提高TPAS在PLA中的分散程度,显著增强了两者的界面结合力;随着PLA-g-MAH含量的增加,共混材料的拉伸强度、断裂伸长率和缺口冲击强度均先升高后降低,含量为15%时达到最大值,较未增容体系分别增加17.9%、18.5%和138.5%;添加PLA-g-MAH导致共混材料结晶能力减弱,表面疏水性提高,共混材料熔体黏弹性增强,加工性能提高。Thermoplastic acetate starch(TPAS)/polylactic acid(PLA)/polylactic acid grafted maleic anhydride(PLA-g-MAH)blend materials were prepared using melting and injection molding processes,and the compatibilization effect of PLA-g-MAH was investigated.The mechanical properties,thermal properties,melt rheological properties and hydrophilicity of the blend materials were analyzed.The results show that PLA-g-MAH improves the dispersion of TPAS in PLA and significantly enhances the interfacial binding force between the two.As the content of PLA-g-MAH increases,the tensile strength,elongation at break and notched impact strength of the blend material first increase and then decrease,reaching the maximum value when the PLA-g-MAH content is 15%.Compared with the non-capacitated system,they increased by 17.9%,18.5%and 138.5%respectively.The addition of PLA-g-MAH leads to the weakening of the crystallization ability of the blend material,the improvement of surface hydrophobicity,the enhancement of the melt viscoelasticity of the blend material,and the improvement of processing performance.

关 键 词：热塑性醋酸淀粉 聚乳酸 聚乳酸接枝马来酸酐 共混 相容性 

分 类 号：TB332[一般工业技术—材料科学与工程]