A bio-based phosphorus-containing flame retardant towards highly flame retardancy, improved crystallization and impact toughness of PLA

IF 5.1 3区工程技术 Q1 CHEMISTRY, APPLIED Reactive & Functional Polymers Pub Date : 2025-03-01 Epub Date: 2025-01-09 DOI:10.1016/j.reactfunctpolym.2025.106152

Jingjing Gao, Yadong Wang, Li Ma, Hui Ge, Guoping Zhu, Xuebao Lin, Long Zheng, Luoxin Wang, Zongmin Zhu

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Abstract

The green, environmentally friendly, and high-performance production of flame-retardant polymers has always been a huge challenge. In this paper, a bio-based flame retardant (PT) with high flame retardancy is synthesized from phytic acid (PA) and 2-aminothiazole (AT) using a green and simple method and is used in polylactic acid (PLA). When 4 wt% of PT is added into PLA, the LOI of PLA composite increases from 19 % to 24.6 % and vertical combustion reaches UL-94 V-0 grade, with a peak heat release rate (pHRR) reduced by 18 %. PT can take away heat in vertical combustion testing by promoting the dripping of molten droplets. On the other hand, in the cone calorimeter test (CCT), PT has the capability to facilitate the development of a compact char layer and achieve the effect of suppressing heat. In addition, the crystallinity of PLA composites has also been improved, with a maximum increase of 74.1 %. PLA/PT composites show a ∼ 50.3 % improvement on the impact performance thanks to plasticizing effect of PT. This work provides a green, environmentally friendly, and simple method for preparing highly efficient flame retardants.

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一种生物基含磷阻燃剂，旨在提高聚乳酸的高阻燃性、结晶性和冲击韧性

绿色、环保、高性能的阻燃聚合物生产一直是一个巨大的挑战。本文以植酸（PA）和2-氨基噻唑（AT）为原料，采用绿色简便的方法合成了高阻燃性的生物基阻燃剂（PT），并将其用于聚乳酸（PLA）中。当PLA中PT含量为4 wt%时，PLA复合材料的LOI由19%提高到24.6%，垂直燃烧达到UL-94 V-0级，峰值放热率（pHRR）降低18%。PT在垂直燃烧试验中可以通过促进熔滴滴出来带走热量。另一方面，在锥形量热计测试（CCT）中，PT能够促进致密炭层的形成，达到抑制热量的效果。此外，PLA复合材料的结晶度也得到了改善，最大提高了74.1%。由于PT的塑化作用，PLA/PT复合材料的冲击性能提高了~ 50.3%。本研究为制备高效阻燃剂提供了一种绿色、环保、简单的方法。

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来源期刊

Reactive & Functional Polymers 工程技术-高分子科学

CiteScore

8.90

自引率

5.90%

发文量

259

审稿时长

27 days

期刊介绍： Reactive & Functional Polymers provides a forum to disseminate original ideas, concepts and developments in the science and technology of polymers with functional groups, which impart specific chemical reactivity or physical, chemical, structural, biological, and pharmacological functionality. The scope covers organic polymers, acting for instance as reagents, catalysts, templates, ion-exchangers, selective sorbents, chelating or antimicrobial agents, drug carriers, sensors, membranes, and hydrogels. This also includes reactive cross-linkable prepolymers and high-performance thermosetting polymers, natural or degradable polymers, conducting polymers, and porous polymers. Original research articles must contain thorough molecular and material characterization data on synthesis of the above polymers in combination with their applications. Applications include but are not limited to catalysis, water or effluent treatment, separations and recovery, electronics and information storage, energy conversion, encapsulation, or adhesion.