DOPO-BASED FLAME RETARDANT: PREPARATION AND ITS APPLICATION IN SILICONE RUBBER BLENDS

IF 1.2 4区工程技术 Q4 POLYMER SCIENCE

Rubber Chemistry and Technology Pub Date : 2022-11-07 DOI:10.5254/rct.22.78969

Xu Mengyang, Liu Cheng, Wang Jincheng

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引用次数: 0

Abstract

In this study, a phosphorus-containing flame retardant, polybis(4-hydroxypheyl)-2-(6-oxo-6-H-dibenzodibenzo [c,e][1,2] oxaphosphino-6-yl) methylene succinate (PHDO) was prepared by melt condensation between (6H-dibenz[c,e][1,2]oxaphosphorin-6-ylmethyl)-p-oxide-butanedioic acid (DDP) and 1,4-benzene dimethanol (PXG). Then, Fourier transform infrared spectroscopy (FTIR) and hydrogen nuclear magnetic resonance (1H NMR) were used to characterize the structure of this novel additive. It was added to silicone rubber (SR) in different proportions, and the flame retardant properties together with tensile behaviors of the SR blends were investigated. Results showed that the thermal stability was improved and the burning rate was slowed down after addition of this novel flame retardant. Vertical burning test, cone calorimetric evaluation, and limited oxygen index (LOI) measurement of the samples revealed that the SR with 15 phr of PHDO owned the best flame retardant properties and may pass UL-94 V-0 grade. This improved flame retardant performance may be ascribed to the formation of dense carbon layers, which effectively prevented the surface oxidation and inhibited combustion of the silicone matrix.

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dopo基阻燃剂的制备及其在硅橡胶共混物中的应用

以(6- h -二苯并[c,e][1,2]磷磷-6-基甲基)-对氧化物丁二酸(DDP)和1,4-苯二甲醇(PXG)为原料，采用熔融缩合法制备了含磷阻燃剂聚双(4-羟基)-2-(6-氧-6- h -二苯并二苯并二苯并并[c,e][1,2]磷磷-6-基)亚甲基琥珀酸(PHDO)。然后利用傅里叶变换红外光谱(FTIR)和氢核磁共振(1H NMR)对该添加剂的结构进行了表征。将其按不同比例添加到硅橡胶(SR)中，研究了共混物的阻燃性能和拉伸性能。结果表明，该新型阻燃剂的加入提高了材料的热稳定性，减缓了材料的燃烧速度。垂直燃烧试验、锥量热评价和限氧指数(LOI)测定结果表明，PHDO含量为15 phr的SR阻燃性能最好，可达到UL-94 V-0级。这种阻燃性能的提高可能是由于形成了致密的碳层，有效地防止了硅基的表面氧化和抑制了燃烧。

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来源期刊

Rubber Chemistry and Technology 工程技术-高分子科学

CiteScore

3.50

自引率

20.00%

发文量

审稿时长

3.6 months

期刊介绍： The scope of RC&T covers: -Chemistry and Properties- Mechanics- Materials Science- Nanocomposites- Biotechnology- Rubber Recycling- Green Technology- Characterization and Simulation. Published continuously since 1928, the journal provides the deepest archive of published research in the field. Rubber Chemistry & Technology is read by scientists and engineers in academia, industry and government.