HIPS／PPO合金的燃烧性能  

Combustion behavior of HIPS/PPO alloys

作　　者：井蒙蒙[1] 刘继纯[1] 陈权[1] 陆昶[1] 张玉清[1] 

机构地区：[1]河南科技大学化工与制药学院,高分子科学与纳米技术重点实验室,河南洛阳471003

出　　处：《合成树脂及塑料》2011年第3期62-65,共4页China Synthetic Resin and Plastics

基　　金：河南科技大学人才科研基金(09001147)和河南科技大学基金(2007ZY021)资助项目

摘　　要：利用HAAKE流变仪将高抗冲聚苯乙烯(HIPS)与聚苯醚(PPO)熔融复合,采用水平燃烧、氧指数测试、高温热分解、热重分析等研究了复合材料的燃烧性能。与纯HIPS相比,HIPS/PPO合金的阻燃性能明显改善。随着PPO用量增加,聚合物合金在燃烧时的熔融滴落和发烟逐渐减少,水平燃烧级别逐渐提高,氧指数增大,热分解温度和热分解后的残留率都逐渐增加。在HIPS树脂基体中加入20 phr PPO可使聚合物合金在空气中燃烧时自熄,水平燃烧级别从FH-3级升为FH-2级。加入PPO后,聚合物合金在高温下成炭能力显著增强,形成的炭层覆盖在聚合物材料表面形成保护层,同时聚合物合金在熔融后的黏度显著增大,两者对热量传递、氧气和分解产物迁移的屏蔽、阻隔作用是造成材料阻燃性能增加的主要原因。A series of high impact polystyrene（HIPS）/polyphenylene oxide（PPO） polymer alloys with different compositions were obtained by melt-compounding HIPS and PPO with a HAAKE rheometer. The combustion behavior of the polymer alloys were studied by means of horizontal burning, oxygen index, hightemperature pyrolysis and thermogravimetry tests. The fire retardancy of the HIPS/PPO alloys improved noticeably in comparison with that of pure HIPS. The melt dripping and smoke release of the polymer alloys decreased gradually, while the horizontal burning rating, oxygen index, decomposition temperature and pyrolytic residue percentage increased with the augmentation of PPO dosage. Adding 20 phr PPO in HIPS matrix could make the polymer alloys self-extinguish in air, thereby raising its horizontal burning rating from FH-3 to FH-2. The introduction of PPO enhanced the charring ability of the polymer alloys at high temperatures greatly and the char residue formed a protection layer on the surface of the polymer material. Meanwhile, the melt viscosity of the polymer alloys increased dramatically. The shielding and obstructing effects of the carbon layer and the increased melt viscosity on the transfer of heat and the movement of oxygen and degradation products were the major reasons for the enhancement of fire retardancy of the alloy materials.

关 键 词：高抗冲聚苯乙烯 聚苯醚 聚合物合金 燃烧性能 

分 类 号：TQ325.2[化学工程—合成树脂塑料工业]