辐射改性淀粉与PBAT共混体系的制备及表征  

Preparation and Characterization of Radiation-Modified Starch and PBAT Blending System

作　　者：苏小雅 夏发明[1] 李嘉彦 方可 姜林旭 李金汤 王晓广[1,2] 王洪龙 SU Xiao-ya;XIA Fa-ming;LI Jia-yan;FANG Ke;JIANG Lin-xu;LI Jin-tang;WANG Xiao-guang;WANG Hong-long(Wuhan Textile University,Wuhan 430200,China;Hubei New Environmental Protection Biomass Material Co.,Ltd.,Huangshi 435200,China)

机构地区：[1]武汉纺织大学,湖北武汉430200 [2]湖北顶新环保新材料有限公司,湖北黄石435200

出　　处：《塑料科技》2023年第1期79-83,共5页Plastics Science and Technology

摘　　要：为提高淀粉与聚对苯二甲酸-己二酸丁二酯(PBAT)的共混性,对原淀粉进行辐射改性,以甘油作为增塑剂,制备热塑性淀粉(TPS)。以改性聚酯(WPT)作为高分子增容剂,将TPS与WPT以及PBAT混合均匀,进入双螺杆挤出机中进行混炼,制备TPS/PBAT共混物。采用扫描电镜、万能材料试验仪、X射线衍射仪、热重分析等表征样品力学性能与相容性。结果表明:辐射淀粉的加入使共混体系的相容有所改善。进一步引入增容剂,共混体系的结晶度和热稳定性下降,力学性能明显改善。当PBAT含量为15%,WPT含量为6%时,增容效果达到最佳,TPS/PBAT的拉伸强度为16.7 MPa,断裂伸长率为107.9%。In order to improve the blending of starch and poly(butylene adipate-co-terephthalate)(PBAT),the original starch was modified by radiation,and thermoplastic starch(TPS)was prepared by using glycerol as plasticizer.TPS/PBAT blends were prepared by mixing TPS with WPT and PBAT in a twin-screw extruder using modified polyester(WPT)as a polymer compatibilizer.The mechanical properties and compatibility of the samples were characterized by scanning electron microscopy,universal material tester,X-ray diffractometer and thermogravimetric analysis.The results show that the addition of radiation starch improves the compatibility of the blends.Further introduction of compatibilizer,the crystallinity and thermal stability of the blends decrease,and the mechanical properties are significantly improved.When the content of PBAT is 15%and the content of WPT is 6%,the compatibilization effect is the best.The tensile strength of TPS/PBAT is 16.7 MPa and the elongation at break is 107.9%.

关 键 词：辐射技术 改性淀粉 聚对苯二甲酸-己二酸丁二酯 增容 力学性能 

分 类 号：TB332[一般工业技术—材料科学与工程]