摘要
聚对苯二甲酸-己二酸-丁二醇酯(PBAT),聚乳酸(PLA)和热塑性淀粉(TPS)通过熔融共混并挤出吹膜。固定PBAT的质量分数为50%,改变PLA和TPS的比例。对PBAT/PLA/TPS薄膜的力学性能、热性能、结晶行为、撕裂断面形态、阻水性和氧气渗透性进行了研究。结果表明,PBAT/PLA/TPS薄膜中PLA的冷结晶温度降低了约40℃,PLA的冷结晶能力增强。随着TPS含量的增加,PBAT/PLA/TPS薄膜的拉伸强度降低、断裂伸长率增加。通过扫描电子显微镜观察,PBAT/PLA/TPS薄膜表现为明显的韧性断裂。水接触角和氧气渗透性测试表明薄膜具有良好的应用性能。
Poly （ butylene adipate-co-terephthalate ） （ PBAT）, poly （ lactic acid） （PLA） and thermoplastic starch（TPS） were melt-blended and extruded into blown films with the fixed PBAT content of 50wt% and the alternating the proportion of PLA and TPS. The mechanical and thermal properties, crystallization behavior, torn surface morphology of blown films, hydrophobicity and oxygen permeability of the PBAT/PLA/TPS blown films were studied. The results show that the cold crystallization temperature of PLA decreases by 40 ℃ nearly, indicating the enhancement of the cold crystallizing power of PLA. With the increase of the TPS content, the tensile strength of PBAT/PLA/TPS films decreases, but the elongation at break increases. The PBAT/PLA/TPS blown films exhibit evident ductile fracture from scanning electron photomicrographs, and they have superior applications performance according to the water contact angle testing and the oxygen permeability coefficient analysis.
出处
《塑料工业》
CAS
CSCD
北大核心
2016年第10期9-13,共5页
China Plastics Industry
基金
国家自然科学基金(51021003和51273201)
吉林省发改委项目(2015Y027)
关键词
聚对苯二甲酸-己二酸-丁二醇酯
聚乳酸
热塑性淀粉
吹膜
生物降解
Poly（ butylene adipate-co-terephthalate）
Poly （ lactic acid）
Thermoplastic Starch
BlownFilms
Biological Degradation
