Renewable isosorbide-derived poly(phosphoester) for simultaneously enhanced flame-retardancy and mechanical property of polylactide  

作　　者：Xin Wang Haoxin Niu Wenwen Guo Lei Song Yuan Hu 

机构地区：[1]State Key Laboratory of Fire Science,University of Science and Technology of China,96 Jinzhai Road,Hefei,Anhui,230026,China

出　　处：《Progress in Natural Science:Materials International》2021年第4期546-556,共11页自然科学进展·国际材料（英文版）

基　　金：financial support from the National Natural Science Foundation of China(Grant No.:51761135113,51973203);the Fundamental Research Funds for the Central Universities(Grant No.:WK2320000047)。

摘　　要：Incorporating flame retardant fillers is the most efficient way to improve the fire resistance of polylactide(PLA).However,most flame retardant fillers result in deterioration of the mechanical property of PLA so far.Therefore,to create high-performance PLA materials combining excellent flame retardancy with superior mechanical properties remains highly attractive and challenging.In this study,a novel isosorbide-derived poly(phosphoester)(PIDI)was synthesized and used as a bio-based flame-retardant for PLA.The addition of PIDI showed a marginal effect on the change of the glass transition temperature of the PLA composites,but the crystallinity degree of the PLA composites was improved by the inclusion of PIDI.Benefitting from the improved crystallinity,the tensile strength,flexural strength,and impact strength of PLA composite containing 15 wt%PIDI was enhanced by19.4%,14.1%,and 36.9%,respectively,compared to the virgin PLA.With the addition of 20 wt%PIDI,the PLA composite showed an LOI value of 25.5%and a UL-94 V-0 rating in the vertical burning test.The flame retardant effect of PIDI was also demonstrated by a notable reduction(-46%)in the peak heat release rate(PHRR)of PLA composite containing 20 wt%PIDI.Such a renewable isosorbide-derived poly(phosphoester)is one of the promising candidates for PLA bio-composites with an outstanding balance between flame retardancy and intrinsic physical properties.

关 键 词：ISOSORBIDE poly(phosphoester) POLYLACTIDE Flame retardancy Mechanical property 

分 类 号：TQ317[化学工程—高聚物工业] TB332[一般工业技术—材料科学与工程]