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三聚氰胺氰尿酸盐@聚（环三磷腈-4,4'-磺酰二苯酚）杂化纳米片填充聚酰胺6复合材料的热稳定性、热解行为及阻燃性能

Thermal Stability, Pyrolysis Behavior, and Fire-Retardant Performance of Melamine Cyanurate@Poly(cyclotriphosphazene--4,4'-sulfonyl diphenol) Hybrid Nanosheet-Containing Polyamide 6 Composites.

作者信息

Malkappa Kuruma, Ray Suprakas Sinha

机构信息

DST-CSIR National Centre for Nanostructured Materials, Council for Scientific and Industrial Research, Pretoria 0001, South Africa.

Department of Applied Chemistry, University of Johannesburg, Doornfontein, 2028 Johannesburg, South Africa.

出版信息

ACS Omega. 2019 Jun 3;4(6):9615-9628. doi: 10.1021/acsomega.9b00346. eCollection 2019 Jun 30.

DOI:10.1021/acsomega.9b00346
PMID:31460052
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6648528/
Abstract

A novel halogen-free highly cross-linked supramolecular poly(cyclotriphosphazene--4,4'-sulfonyl diphenol) (PZS)-functionalized melamine cyanurate (MCA) (MCA@PZS) hybrid nanosheet fire-retardant (FR) was synthesized and thoroughly characterized using scanning electron microscopy, Fourier-transform infrared (FTIR), X-ray diffraction, and X-ray photoelectron spectroscopy analyses. The polyamide 6 (PA6) composites comprising MCA, PZS, and the MCA@PZS hybrids were prepared via the melt-blending technique. The thermogravimetric analysis combined with FTIR and mass spectroscopy revealed that during thermal degradation, the PA6/MCA@PZS composites released less toxic gases and small organic volatile compounds than the neat PA6 and composites containing MCA or PZS solely. Moreover, compared to neat PA6, the PA6 composite with a 5 wt % MCA@PZS hybrid exhibited enhanced fire retardation properties, with a 29.4 and 32.1% decrease in the peak heat and total heat release rates, respectively. Besides, the PA6 composites with MCA@PZS-5% content achieved a V-0 rating in the UL-94 test. Finally, based on the obtained results from gaseous and condensed phases, the possible mechanism responsible for improved FR properties of the PA6/MCA@PZS composites was proposed.

摘要

合成了一种新型无卤高交联超分子聚（环三磷腈-4,4'-磺酰基二苯酚）（PZS）功能化三聚氰胺氰尿酸盐（MCA）（MCA@PZS）杂化纳米片阻燃剂（FR），并通过扫描电子显微镜、傅里叶变换红外光谱（FTIR）、X射线衍射和X射线光电子能谱分析对其进行了全面表征。通过熔融共混技术制备了包含MCA、PZS和MCA@PZS杂化物的聚酰胺6（PA6）复合材料。热重分析结合FTIR和质谱表明，在热降解过程中，PA6/MCA@PZS复合材料释放的有毒气体和小有机挥发性化合物比纯PA6以及仅含MCA或PZS的复合材料少。此外，与纯PA6相比，含有5 wt% MCA@PZS杂化物的PA6复合材料表现出增强的阻燃性能，峰值热释放率和总热释放率分别降低了29.4%和32.1%。此外，含5% MCA@PZS的PA6复合材料在UL-94测试中达到了V-0等级。最后，基于气相和凝聚相的实验结果，提出了PA6/MCA@PZS复合材料阻燃性能提高的可能机理。

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