低烟低热薄壁阻燃聚碳酸酯材料的制备与性能  

Preparation and properties of thin-wall flame-retardant polycarbonate materials with low heat release and smoke

作　　者：江惠 刘杰[2] 张璐[1,2] 李三喜[1] 唐涛[2] 王松[1] JIANG Hui;LIU Jie;ZHANG Lu;LI Sanxi;TANG Tao;WANG Song(School of Environmental and Chemical Engineering,Shenyang University of Technology,Shenyang 110870,China;Key Laboratory of Polymer Physics and Chemistry,Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China)

机构地区：[1]沈阳工业大学环境与化学工程学院,沈阳110870 [2]中国科学院长春应用化学研究所高分子物理与化学国家重点实验室,长春130022

出　　处：《复合材料学报》2024年第10期5423-5433,共11页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(51991353,51991350)。

摘　　要：兼具低烟低热和薄壁阻燃的无卤无氟聚碳酸酯(PC)的制备是该领域面临的一个挑战。以八甲基环四硅氧烷和硼酸为原料,通过缩聚反应制备了一种聚硼硅氧烷(PBS)阻燃剂,将其与硼酚醛树脂(LPR)复配制备了PBS-LPR/PC复合材料。结果表明:在PBS和LPR总添加量为10wt%、质量比3∶1时,在PC中表现出最佳的协同阻燃效果,1.6 mm厚的PC样品能够通过UL-94垂直燃烧测试的V-0级别。与PC相比,该样品的峰值放热率(pHRR)、峰值产烟率(pSPR)、总热释放(THR)和总烟生成(TSP)分别降低了76%、64%、49%和65%。阻燃机制研究表明:PBS和PC的交联成炭以及LPR的原位成炭是阻燃性能提高的主要原因。7.5%PBS-2.5%LPR/PC的缺口冲击强度是PC的2.3倍,材料表现出高韧的特性。The preparation of halogen-free and fluorine-free thin-wall flame-retardant polycarbonate(PC)with low smoke and heat release was a challenge in the field.Polyborosiloxane(PBS)flame retardant was prepared by polycondensation reaction between octamethyl cyclotetrasiloxane and boric acid,and then compounded with boron-phenolic resin(LPR)to prepare PBS-LPR/PC composites.The results show that when the total amount of PBS and LPR is 10wt%and the mass ratio is 3∶1,the best flame-retardant effect is shown in PC,the 1.6 mm thick PC sample can pass UL-94 V-0 rating.Compared with that of pure PC,the peak heat release rate(pHRR),the peak smoke production rate(pSPR),the total heat release(THR)and the total smoke production(TSP)of sample reduces by 76%,64%,49%and 65%,respectively.The investigation on flame-retardant mechanism show that LPR decreases the viscosity of PC composites first and then increases,which confirms the generation of cross-linking reaction.The notched impact strength of 7.5%PBS-2.5%LPR/PC is 2.3 times that of PC,which makes the material show high toughness.

关 键 词：聚碳酸酯 聚硼硅氧烷 酚醛树脂 薄壁阻燃 低烟低热 

分 类 号：TB332[一般工业技术—材料科学与工程]