Effect of aluminum diethylphosphinate on flame retardant and thermal properties of rigid polyurethane foam composites

被引：70

作者：

Tang, Gang ^{[1
,2
,3
]}

Zhou, Lin ^{[2
,3
]}

Zhang, Ping ^{[2
,3
]}

Han, Zhongqiang ^{[4
]}

Chen, Depeng ^{[1
]}

Liu, Xiuyu ^{[1
]}

Zhou, Zijian ^{[1
]}

机构：

[1] Anhui Univ Technol, Sch Architecture & Civil Engn, 59 Hudong Rd, Maanshan 243002, Anhui, Peoples R China

[2] Southwest Univ Sci & Technol, State Key Lab Environm Friendly Energy Mat, Mianyang 621010, Sichuan, Peoples R China

[3] Southwest Univ Sci & Technol, Sch Mat Sci & Engn, Mianyang 621010, Sichuan, Peoples R China

[4] Beijing Oriental Yuhong Waterproof Technol Co Ltd, State Key Lab Special Funct Waterproof Mat, Beijing 101309, Peoples R China

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2020年 / 140卷 / 02期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

Rigid polyurethane foam; Flame retardant; Composites; Thermal properties; EXPANDABLE GRAPHITE; MELAMINE POLYPHOSPHATE; MECHANICAL-PROPERTIES; EPOXY-RESIN; DEGRADATION; NANOCOMPOSITES; COMBINATION; HYPOPHOSPHITE; PHOSPHINATE; PERFORMANCE;

D O I：

10.1007/s10973-019-08897-z

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Rigid polyurethane foam/aluminum diethylphosphinate (RUPF/ADP) composites were prepared by one-step water-blown method. Furthermore, scanning electron microscope (SEM), thermal conductivity meter, thermogravimetric analysis (TGA), limiting oxygen index, Underwriters Laboratories vertical burning test (UL-94) and microsacle combustion calorimetry were applied to investigate thermal conductivity, thermal stability, flame retardancy and combustion behavior of RPUF/ADP composites. Thermogravimetric analysis-Fourier transform infrared spectroscopy (TG-FTIR) was introduced to investigate gaseous products in degradation process of RPUF/ADP composites, while SEM and X-ray photoelectron spectroscopy were used to research char residue of the composites. It was confirmed that RPUF/ADP composites presented well cell structure with density of 53.1-59.0 kg m(-3) and thermal conductivity of 0.0425-0.0468 W m(-1) K-1, indicating excellent insulation performance of the composites. Flame retardant test showed that ADP significantly enhanced flame retardancy of RPUF/ADP composites, RPUF/ADP30 passed UL-94 V-1 rating with LOI of 23.0 vol%. MCC test showed that ADP could significantly decrease peak of heat release rate (PHPR) of RPUF/ADP composites. PHPR value of RPUF/ADP20 was decreased to 158 W g(-1), which was 21.8% reduced compared with that of pure RPUF. TG-FTIR test revealed that the addition of ADP promoted the release of CO2, hydrocarbons and isocyanate compound in first-step degradation of RPUF matrix while inhibited the release of CO in second step degradation. Char residue analysis showed that the addition of ADP promoted polyurethane molecular chain to form aromatic and aromatic heterocyclic structure, enhancing strength and compactness of the char. This work associated a gas-solid flame retardancy mechanism with the incorporation of ADP, which presented an effective strategy for preparation of flame retardant RPUF composites.

引用

页码：625 / 636

页数：12

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