低烟低毒型阻燃酚醛复合材料的制备与性能表征

Preparation and characterization of flame-retardant phenolic laminated composite with low smoke and toxic gas release

从分子水平上研究了固化工艺对酚醛/玻纤复合材料(GRPC-1)基体结构和抗冲击性能的影响,探讨了酚醛基体和阻燃添加剂在燃烧过程中的成分结构演变与阻燃机制。在此基础上通过酚醛结构与配方设计及制备工艺优化,制备出一种兼具低烟低毒性能和良好抗冲击性能的GRPC-1,燃烧4 min时的烟密度Ds值为5,CO的释放浓度为2.75×10-4,无HCN、HF、HCl、SO2、NOx等有毒有害气体释放,抗冲击强度达到25.6 m˙N。结果表明,GRPC-1的烟密度和毒性气体释放性能达到进口材料(Cycom2290/7781)实测水平。

The relation between the molecular structure for the cured resins,the processing and the property of impact resistance was investigated on the molecular level in this paper,by using the technology of resol synthesis and combination design.Meanwhile,the chemical evolution of phenolic basic resin and flame-retardant additive in the burning process and the flame-retardant mechanism were also studied in detail.Furthermore,a novel phenolic laminated composite with low smoke and toxic gas release and excellent impact resistance was prepared according the above results.After 4 min＇s burning,the as-prepared composite exhibits outstanding combined properties as well as that of the Cycom2290/7781,including the smoke density of 5,the carbon monoxide concentration of 2.75 × 104,no release of HCN,HF,HCl,SO2 and NOx,and the impact resistance of 25.6 m · N.