Properties and Mechanism of Flame Retardant Poly(Lactic Acid) Composites Containing Phosphaphenanthrene-Hydroxyl Phenyl Maleimide Derivative

IF 3.9 3区化学 Q2 POLYMER SCIENCE

Journal of Polymer Science Pub Date : 2025-02-12 DOI:10.1002/pol.20241098

Lijuan Long, Xiang Nie, Xin Wang, Chunyan Shan, Shuhao Qin, Wei Gong, Fu Hai, Jie Yu

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Abstract

A derivative based on 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and maleimide units with terminal hydroxyl group (DH) was synthesized and incorporated in poly(lactic acid) (PLA). The properties and mechanism of PLA/DH composites were investigated. The results showed that PLA composites under 10 wt% DH load achieved vertical combustion test (UL-94) V-0 rating with an increased limiting oxygen index (LOI) of 27.2% and a 15.8% decrease in peak heat release rate. The prominent flame retardant efficiency of DH in PLA was attributed to its excellent flame inhibition and diluting effects in gaseous phase as well as a certain cross-linked structure in the condensed phase. Specifically, the elongation at break of PLA/DH-7.5 was increased by 17.6% in comparison to that of pure PLA. DH with terminal hydroxyl group displayed enhanced interaction and good compatibility with PLA, thus endowing good comprehensive performances to PLA. As a result, the combination of phosphaphenanthrene and maleimide units with terminal hydroxyl group provides a facile and effective method to improve the flame retardancy and mechanical properties of PLA.

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含磷菲-羟基苯基马来酰亚胺衍生物阻燃聚乳酸复合材料的性能及机理

合成了以9,10-二氢-9-氧-10-磷菲-10-氧化物和末端羟基（DH）的马来酰亚胺为单元的衍生物，并将其掺入聚乳酸（PLA）中。研究了聚乳酸/DH复合材料的性能和机理。结果表明，在10 wt% DH负荷下，PLA复合材料达到了垂直燃烧试验（UL-94） V-0等级，极限氧指数（LOI）提高了27.2%，峰值放热率降低了15.8%。DH在PLA中具有突出的阻燃效果，这是由于其在气相中具有优异的抑燃和稀释作用，在凝聚相中具有一定的交联结构。具体来说，PLA/DH-7.5的断裂伸长率比纯PLA提高了17.6%。末端羟基的DH与PLA的相互作用增强，相容性好，使PLA具有良好的综合性能。因此，磷菲与端羟基马来酰亚胺单元的结合为提高聚乳酸的阻燃性和力学性能提供了一种简便有效的方法。

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来源期刊

Journal of Polymer Science POLYMER SCIENCE-

CiteScore

6.30

自引率

5.90%

发文量

264

期刊介绍： Journal of Polymer Research provides a forum for the prompt publication of articles concerning the fundamental and applied research of polymers. Its great feature lies in the diversity of content which it encompasses, drawing together results from all aspects of polymer science and technology. As polymer research is rapidly growing around the globe, the aim of this journal is to establish itself as a significant information tool not only for the international polymer researchers in academia but also for those working in industry. The scope of the journal covers a wide range of the highly interdisciplinary field of polymer science and technology.