Novel flame retardant effects of dopo and poss on epoxy resin

Wenchao Zhang, Rongjie Yang*, Deping Zhang

*此作品的通讯作者

科研成果: 书/报告/会议事项章节会议稿件同行评审

摘要

A series of flame retarded epoxy resins (EP) are prepared with a novel polyhedral oligomeric silsesquioxane containing 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO-POSS), OPS (octaphenyl polyhedral oligomeric silsesquioxane) and DOPO (9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide). The flame retardancy of these EPs are tested by the LOI and UL-94 measurements, indicating that DOPO-POSS has meaningful effects on the flame retardancy of EP composites. 2.5 wt. % DOPO-POSS incorporation into epoxy resin results in a LOI value 30.2 and UL-94 V-1 (t1 = 8 s and t2 = 3 s) rating. A very interesting blowing-out effect through the pyrolytic gases spurt are observed in UL-94 test for the EP/2.5%DOPO-POSS. When the mixture of OPS and DOPO, instead of the compound DOPO-POSS, is used in the EP composites, both of them seem to be able to retard synergistically flame of the EP composites, and the more remarkable blowing-out effect is observed. The details of fire behaviors, such as HRR, p-HRR, COPR, and CO2PR are tested by cone calorimeter. The EP composites with low load of DOPO-POSS and the mixture of OPS and DOPO, respectively, can produce big intumescent char during the cone calorimeter testing. All of experimental results indicate that the blowing-out effect may be determined not only by the releases of pyrolytic gases, but also by the char structure in the condensed phase.

源语言英语
主期刊名23rd Annual Conference on Recent Advances in Flame Retardancy of Polymeric Materials 2012
172-181
页数10
出版状态已出版 - 2012
活动23rd Annual Conference on Recent Advances in Flame Retardancy of Polymeric Materials 2012 - Stamford, CT, 美国
期限: 21 5月 201223 5月 2012

出版系列

姓名23rd Annual Conference on Recent Advances in Flame Retardancy of Polymeric Materials 2012

会议

会议23rd Annual Conference on Recent Advances in Flame Retardancy of Polymeric Materials 2012
国家/地区美国
Stamford, CT
时期21/05/1223/05/12

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