Cone calorimeter study of polyethylene flame retarded with expandable graphite and intumescent fire-retardant additives

被引：20

作者：

Kruger, Hermanus Joachim ^{[1
]}

Focke, Walter Wilhelm ^{[1
]}

Mhike, Washington ^{[1
]}

Taute, Albertus ^{[1
]}

Roberson, Albert ^{[1
]}

Ofosu, Osei ^{[2
]}

机构：

[1] Univ Pretoria, Inst Appl Mat, Dept Chem Engn, SARChI Chair Carbon Technol & Mat, ZA-0028 Hatfield, South Africa

[2] CSIR Mat Sci & Mfg, Polymers & Composites Competence Area, Port Elizabeth, South Africa

来源：

JOURNAL OF FIRE SCIENCES | 2014年 / 32卷 / 06期

基金：

新加坡国家研究基金会;

关键词：

Expandable graphite; exfoliation; intumescent flame retardant; thermal analysis; cone calorimeter; FLAMMABILITY; POLYOLEFINS; EXFOLIATION; SYSTEMS; CHAR;

D O I：

10.1177/0734904114538755

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Polyethylene was flame retarded with two intumescent-type additives, 3,5-diaminobenzoic acid phosphate and ethylenediamine phosphate, which differ with respect to their decomposition onset temperatures, along with varying ratios of two grades of expandable graphite, also differing with respect to their onset temperatures for exfoliation. Hot-pressed sheet specimens were subjected to evaluation in a cone calorimeter. Although the best char yields were obtained with formulations containing the higher decomposition temperature intumescent, 3,5-diaminobenzoic acid phosphate, the overall best performance was realized using the lower decomposition temperature intumescent, ethylenediamine phosphate, when compounded together with the low exfoliation temperature expandable graphite. These results are attributed to the formation, at the burning surface, of a more cohesive char with better thermal and mass transfer barrier properties.

引用

页码：498 / 517

页数：20

共 25 条

[1] HEAT RELEASE RATE - THE SINGLE MOST IMPORTANT VARIABLE IN FIRE HAZARD [J].