苯并噁嗪与木质素磺酸钠协同阻燃聚酯复合材料的性能分析  

Performance analysis of the synergistic flame-retardant polyester composite of benzoxazine and sodium lignosulfonate

作　　者：周杰[1] 徐豫松 张涛 张先明[1] ZHOU Jie;XU Yusong;ZHANG Tao;ZHANG Xianming(School of Materials Science&Engineering,Zhejiang Sci-Tech University,Hangzhou 310018,China;School of Art and Design,Zhejiang Sci-Tech University,Hangzhou 310018,China)

机构地区：[1]浙江理工大学,材料科学与工程学院,杭州310018 [2]浙江理工大学,艺术与设计学院,杭州310018

出　　处：《浙江理工大学学报（自然科学版）》2024年第2期180-187,共8页Journal of Zhejiang Sci-Tech University(Natural Sciences)

基　　金：浙江省重点研发计划项目(2020C01143)。

摘　　要：为提高聚对苯二甲酸乙二醇酯(PET)的阻燃性能,以苯并噁嗪(BOZ)和木质素磺酸钠(SLS)为改性材料,制备了以PET为基体的聚酯复合材料。采用扫描电镜观察聚酯复合材料的表面形貌,通过热失重分析、差示扫描量热分析、极限氧指数(LOI)测试和垂直燃烧实验(UL-94)表征聚酯复合材料的热性能和阻燃性能,利用能量色散X射线光谱仪分析残炭情况,并使用电子万能试验机测试力学性能。结果表明:BOZ和SLS在PET基体中没有出现明显的团聚现象;当BOZ和SLS的质量比为1∶0.5、总添加量(质量分数)为10%时,聚酯复合材料的结晶度、熔融温度和残炭量相比纯PET均有所提高;聚酯复合材料的LOI值提高到了26.4%,UL-94等级达到了V-1等级,燃烧时的熔体滴落被有效抑制;残炭分析结果表明,聚酯复合材料的阻燃遵循凝聚相阻燃机理;聚酯复合材料的拉伸强度和断裂伸长率相比纯PET有所下降,但聚酯复合材料的杨氏模量相比纯PET有所提高。该研究可为聚酯复合材料的阻燃研究提供参考。To improve the flame-retardant properties of polyethylene terephthalate(PET),a composite with PET as the substrate was prepared by using benzoxazine(BOZ)and sodium lignosulfonate(SLS)as modifying materials.The surface morphology of the polyester composite was observed by scanning electron microscopy.The thermal and flame-retardant properties of the polyester composite were investigated by thermogravimetric analysis,differential scanning calorimetry analysis,limiting oxygen index(LOI)test and vertical combustion test(UL-94),the residual chars were analyzed by energy dispersive X-ray spectrometry,and the mechanical property was characterized by universal testing machine.The results showed that no significant agglomeration was observed in the PET matrix for BOZ and SLS;when the mass ratio of BOZ and SLS was 1∶0.5 and the total addition amount was 10.0%(by mass fraction),the crystallinity,melting temperature and residual char of the polyester composite were higher than those of PET;the LOI value of the polyester composite was increased to 26.4%,the UL-94 reached V-1,and the melt dripping during combustion was effectively suppressed;residual char analysis indicated that the flame retarding of the polyester composite followed the condensed phase flame-retardant mechanism;the tensile strength and elongation at break of the polyester composite decreased compared to pure PET.However,the Young's modulus of the polyester composite increased compared with the pure PET.This study can serve as reference for studying the flame-retardant properties of polyester composites.

关 键 词：苯并噁嗪 木质素磺酸钠 聚对苯二甲酸乙二醇酯 复合材料 热性能 阻燃性能 

分 类 号：TQ342.92[化学工程—化纤工业]