Properties of flame retarded PC/ABS/polyborosiloxane

doi:10.16085/j.issn.1000-6613.2016.03.032

Abstract

Abstract: Surfaces of the PC/ABS/polyborosiloxane before and after combustion were analyzed by the energy dispersive X-ray (EDX). The mechanical properties and processing properties of the flame retarded PC/ABS alloy were also investigated. It was demonstrated that Si element in the polyborosiloxane (PB) would gradually concentrate on the surface of the alloy during the combustion process to form Si-rich insulating char layer on the surface of substrate. The layer retards the alloy from further combustion,which effectively improve the flame retardancy of the PC/ABS alloy. PB degrades mechanical properties of PC/ABS alloy system:PB has a great influence on the impact strength,but decreases the tensile strength only a little. The addition of compatilizer named maleic anhydride grafted ABS in the PC/ABS/PB can obviously enhance the mechanical properties of PC/ABS alloy system. Appropriate amount of PB can improve processing performance of the PC/ABS alloy.

Key words: polyborosiloxane, PC/ABS alloy, flame retardancy, mechanical property, compatilizer

摘要： 采用X射线能谱分析(EDX)研究了PC/ABS/聚硼硅氧烷阻燃合金的燃烧行为,同时考察了阻燃PC/ABS合金的力学性能和加工性能。结果表明,聚硼硅氧烷(PB)中的Si元素会随着燃烧过程的进行逐渐在合金表面进行富集,形成富含Si的绝缘炭层覆盖在基体表面,阻止合金继续燃烧,从而有效提高了PC/ABS合金的阻燃性能。聚硼硅氧烷使PC/ABS合金体系的力学性能有所下降,但拉伸强度下降较少,PB对PC/ABS合金的冲击强度影响较大。在阻燃PC/ABS合金体系中加入相容剂马来酸酐接枝ABS,可使合金体系的力学性能得到明显提高。适量的PB可以改善PC/ABS合金的加工性能。

关键词: 聚硼硅氧烷, PC/ABS合金, 阻燃, 力学性能, 相容剂

CLC Number:

TQ322.3

ZHOU Wenjun, WANG Xueqin, HE Weizhuang. Properties of flame retarded PC/ABS/polyborosiloxane[J]. Chemical Industry and Engineering Progree, 2016, 35(03): 861-865.

周文君, 王雪芹, 何伟壮. PC/ABS/聚硼硅氧烷阻燃合金的性能[J]. 化工进展, 2016, 35(03): 861-865.

References

[1] TANG H,ZHOU X,LIU X.Effect of magnesium hydroxide on the flame retardant properties of unsaturated polyester resin[J].Procedia Engineering,2013,52:336-341.

[2] YANG H,WANG X,YU B,et al.Effect of borates on thermal degradation and flame retardancy of epoxy resins using polyhedral oligomeric silsesquioxane as a curing agent[J].Thermochimica Acta,2012,535:71-78.

[3] 朱靖,赵磊,吴勇. DOPO 型含磷本质阻燃环氧树脂的研究进展[J].化工进展,2011,30(3):573-577.

[4] YANG S,LV G,LIU Y,et al. Synergism of polysiloxane and zinc borate flame retardant polycarbonate[J]. Polymer Degradation and Stability,2013,98:2795-2800.

[5] HAMGANI S,LONGUET C,PERRIN D. Flame retardancy of silicone-based materials[J]. Polymer Degradation and Stability,2009,94(4):465-495.

[6] IJI M,SERIZAWA S.Silicone derivatives as new flame retardants for aromatic thermoplastics used in electronic devices[J]. Polymers for Advanced Technologies,1998,9:593-600.

[7] ZHOU W,YANG H.Flame retarding mechanism of polycarbonate containing methylphenyl-silicone[J]. Thermochimica Acta,2007,452(1):43-48.

[8] 邓莲丽,沈敏敏,于静,等. 有机硅改性松香基环氧树脂的制备及阻燃性能[J]. 化工学报,2012,63(1):307-313.

[9] HUO Y,FAN Q,DEMBSEY N A,et al.Improvements on flame retardant properties of PET/montmorillonite nanocomposite caused by polyborosiloxane[J]. Materials Research Society Symposium Proceeding,2007,1007(12):33.

[10] TANG Z,LI Y,ZHANG Y J,et al. Oligomeric siloxane containing triphenylphosphonium phosphate as a novel flame retardant for polycarbonate[J]. Polymer Degradation and Stability,2012,97:638-644.

[11] POLA J,HERLIN N,BRUS J,et al. IR laser production of nanostructured polyborocarbosiloxane powders with Si-O-B bonds[J]. Solid State Sciences,2005,7:123-131.

[12] ELIZA W E,SCHARTEL B,CIESIELSKI M. Are novel aryl phosphates competitors for bisphenol A bis(diphenyl phosphate) in halogen-free flame-retarded polycarbonate/acrylonitrile-butadiene- styrene blends?[J]. European Polymer Journal,2012,48:1561-1574.

[13] 闵峰,韦平,江平开,等. 新型磷硅阻燃剂的合成及其对PC/ABS的阻燃研究[J]. 工程塑料应用,2008,36(4):5-8.

[14] DESPINASSE M C,SCHARTEL B. Influence of the structure of aryl phosphates on the flame retardancy of polycarbonate/acrylonitrile- butadiene-styrene[J]. Polymer Degradation and Stability,2012,97:2571-2580.

[15] WEI P,TIAN G,YU H,et al. Synthesis of a novel organic-inorganic hybrid mesoporous silica and its flame retardancy application in PC/ABS[J]. Polymer Degradation and Stability,2013,98:1022-1029.

[16] 杨克亚,沈同德. 纳米SiO₂对PC/ABS/RDP阻燃体系的协同作用[J]. 塑料,2012,41(6):7-10.

[17] ZHONG H F,WU D. Synthesis,characteristic of a novel additive-type flame retardant containing silicon and its application in PC/ABS alloy[J]. Journal of Materials Science,2007,42(24):10106-10112.

[18] 王雪芹,周文君,张敬礼,等. 甲基苯基聚硼硅氧烷对PC/ABS合金阻燃性能的影响[J]. 中国塑料,2013,27(12):41-46.