挤出吹塑工艺对PBAT/PLA共混体系微观结构与性能的影响
Effect of extrusion blowing process on microstructure and properties of PBAT/PLA blend
杨超永 1郭金强 1王富玉 1张玉霞1
作者信息
- 1. 北京工商大学轻工科学与工程学院,北京 100048
- 折叠
摘要
通过调控工艺条件(机头温度、牵引速度)熔融共混挤出吹塑聚己二酸/对苯二甲酸丁二醇酯/聚乳酸(PBAT/PLA)原位成纤共混体系薄膜.结果表明,在较低的机头温度时,随着牵引速度的不断增加,分散相PLA在连续相PBAT中原位成纤,且微纤直径逐渐减小,结晶度先增大后下降.挤出吹塑薄膜的纵向拉伸强度和拉伸模量均先增加后减小.在机头温度为150℃、牵引速度为5.0 m/min时,共混体系中PLA成纤效果最明显;薄膜纵向拉伸强度达到40.0 MPa,比纯PBAT提高了20%;拉伸模量达到723.9 MPa,较纯PBAT提升明显.
Abstract
The in-situ fibrillation films based on poly(adipic acid/butylene terephthalate)(PBAT)/poly(lactic acid)(PLA)blends were prepared by extrusion blowing through adjusting the extrusion process conditions such as die temper-ature and traction speed.The results indicated that PLA tended to form fibers in PBAT/PLA blend system with an in-crease in the traction speed at lower die temperature.The formed fibers tended to refine with an increase at first and then a decrease in the crystallinity.The longitudinal tensile strength and tensile modulus of in-situ fiber formed films also in-creased at first and then tended to decrease.The effect of PLA in-situ fibrillation was the most obvious in the blend at a die temperature of 150℃and a traction speed of 5.0 m/min.Meantime,the longitudinal tensile strength and modulus of the films reached 40.0 and 723.9 MPa,respectively.Their tensile strength was 20%higher than that of pure PBAT,whereas their tensile modulus was much higher than that of pure PBAT.
关键词
聚己二酸/对苯二甲酸丁二醇酯/聚乳酸/原位成纤/挤出吹塑/牵引速度/机头温度/微观结构/薄膜Key words
poly(adipic acid/butylene terephthalate)/poly(lactic acid)/in-situ fibrillation/extrusion blow molding/traction speed/die temperature/microstructure/film引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据