摘要
通过对比不同流动性的聚己二酸/对苯二甲酸丁二酯(PBAT)树脂基体和不同粒径的碳酸钙填料,研究了它们对PBAT母粒制品和其复配薄膜的影响。本研究通过不同类型的树脂PBAT和碳酸钙粉体经双螺杆挤出机改性加工获得母粒制品,母粒制品再与树脂PBAT以比例混合后经吹膜成型获得薄膜。首先是对比树脂基体,发现随着树脂流动性的提高,母粒复配薄膜制品的力学性能是出现相应下降的,而树脂流动性的提高对母粒的分散性能的影响是正向的,这说明了高熔体质量流动速率(MFR)的PBAT虽然在母粒易加工性方面是有益的,但是会牺牲掉一部分的力学性能。其次母粒所使用碳酸钙粉体填料从粒径角度出发,研究其对母粒制品力学性能和分散性能影响,发现使用较小粒径的碳酸钙粉体其薄膜综合性能是更优的,而粉体粒径过大或树脂MFR过低均会容易产生分散不良导致膜面“晶点问题”。
The effects of polyadipic acid/butylene terephthalate(PBAT)resin matrix with different fluidity and calcium carbonate fillers with different particle sizes on PBAT masterbatch products and composite films were studied.In this study,masterbatch products were obtained by mixing different types of resin PBAT and calcium carbonate powder by the twin-screw extruder,and then the masterbatch products were mixed with PBAT resin in proportion and then the films were formed by blowing film.The results show that compared with the resin matrix,with the increase of resin fluidity,the mechanical properties of the masterbatch composite film products correspondingly decrease.The increase of resin fluidity has a positive impact on the dispersion properties of the masterbatch.Although PBAT with high melt flow rate(MFR)is beneficial in the machinability of the masterbatch,it would sacrifice parts of the mechanical properties.Secondly,from the perspective of particle sizes,the effects of calcium carbonate powder filler used in the masterbatch on the mechanical properties and the dispersion properties of masterbatch products were studied.The results show that the use of calcium carbonate powder with smaller particle sizes brings better comprehensive properties to the films.If the powder particle size is too large,or the resin MFR is too low,the poor dispersion would appear,resulting to the“crystal point problem”on the film surface.
作者
王程
付学俊
余兴兴
陈业中
WANG Cheng;FU Xuejun;YU Xingxing;CHEN Yezhong(Enterprise Technology Center of Kingfa Technology Co.,Ltd.,Guangzhou 510520,China)
出处
《塑料工业》
CAS
CSCD
北大核心
2024年第7期60-64,96,共6页
China Plastics Industry
关键词
聚己二酸/对苯二甲酸丁二酯
碳酸钙
母粒
分散性能
流动性
Polyadipate/Butylene Terephthalate
Calcium Carbonate
Masterbatch
Dispersion Property
Mobility