Morphology and properties of biodegradable poly (lactic acid)/poly (butylene adipate-co-terephthalate) blends with different viscosity ratio

被引：61
作者：
Lu, Xiang [1 ,2 ,3 ]
Zhao, Jianqing [1 ,2 ]
Yang, Xiaoyun [3 ]
Xiao, Peng [3 ]
机构：
[1] South China Univ Technol, Coll Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China
[2] South China Univ Technol, Minist Educ, Key Lab Polymer Proc Engn, Guangzhou 510640, Guangdong, Peoples R China
[3] Kingfa Sci & Technol Co Ltd, Natl Certified Enterprise Technol Ctr, Guangzhou 510663, Guangdong, Peoples R China
来源：
POLYMER TESTING | 2017年 / 60卷
关键词：
Viscosity ratio; Morphology; Properties; PLA/PBAT blends; MECHANICAL-PROPERTIES; PLA; BEHAVIORS; PLA/PBAT; NYLON-6; PHASE; PBAT;
D O I：
10.1016/j.polymertesting.2017.03.008
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Phase morphology exerts a tremendous influence on the properties of polymer blends. The development of the blend morphology depends not only on the intrinsic structure of the component polymers but also on extrinsic factors such as viscosity ratio, shearing force and temperature in the melt processing. In this study, various poly (butylene adipate-co-terephthalate) (PBAT) materials with different melt viscosity were prepared, and then poly (lactic acid) (PLA)/PBAT blends with different viscosity ratio were prepared in a counter-rotating twin-screw extruder under constant processing conditions. The influence of viscosity ratio on the morphology, mechanical, thermal and rheological properties of PLA/PBAT (70/30 wow) blends was investigated. The experimental results showed that the morphology and properties of PLA/ PBAT blends strongly depended on the viscosity ratio. Finer size PBAT phase were observed for viscosity ratio less than 1 (gimel < 1) compared to samples with gimel > 1. It was found that the interfacial tensions of PLA and PBAT were significantly different when the viscosity ratio was changed, the lowest interfacial tensions (0.12 mN/m) was obtained when the viscosity was 0.77. Additionally, the maximal tensile strength in PLA/PBAT blends were obtained when the viscosity ratio was 0.44, while the maximal impact properties were obtained when the viscosity ratio was 1.95. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：58 / 67
页数：10
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