碳化硼改性聚苯硫醚短纤维的制备及抗氧化性研究  

Preparation and antioxidant properties of boron carbide modified polyphenylene sulfide staple fibers

作　　者：任冰涛 REN Bingtao(Shandong Minghua New Materials Co.,Ltd.,Jinan 250204)

机构地区：[1]山东明化新材料有限公司,山东济南250204

出　　处：《合成纤维工业》2024年第2期49-52,共4页China Synthetic Fiber Industry

摘　　要：以纤维级聚苯硫醚(PPS)树脂和纳米级碳化硼为原料,采用硅烷偶联剂对纳米级碳化硼进行表面处理,将处理后的碳化硼与PPS共混熔融纺丝制备碳化硼改性PPS短纤维,利用浓硫酸对改性PPS短纤维进行氧化处理,研究纳米碳化硼含量及硅烷偶联剂含量对改性PPS短纤维抗氧化性的影响,并探讨了其抗氧化机理。结果表明:随着碳化硼含量及硅烷偶联剂含量的增加,改性PPS短纤维经浓硫酸处理后的强力保持率均呈现先增后降的变化趋势;在硅烷偶联剂质量分数(相对碳化硼)为0.7%、碳化硼质量分数(相对PPS)为1.2%时,改性PPS短纤维的抗氧化性好,纤维在浓硫酸处理下强力保持率达94.7%,比未改性PPS短纤维经浓硫酸处理后的强力保持率(84.9%)提高11.5%;碳化硼改性PPS短纤维的抗氧化机理主要是碳化硼本身具有良好的抗氧化性,硅烷偶联剂的分散作用和偶联作用也有助于提高PPS短纤维的抗氧化性能。Using fiber-grade polyphenylene sulfide(PPS)resin and nanoscale boron carbide as raw materials,boron carbide modified PPS staple fibers were prepared by blend melt spinning of PPS and nanoscale boron carbide subjected to surface treatment with silane coupling agent.And the modified PPS staple fibers were oxidized using concentrated sulfuric acid.The effects of nanoscale boron carbide content and silane coupling agent content on the antioxidant properties of modified PPS staple fibers were studied,and its antioxidant mechanism was explored.The results showed that the strength retention rate of modified PPS staple fibers exposed to concentrated sulfuric acid treatment showed a trend of first increasing and then decreasing with the increase of boron carbide content and silane coupling agent content;the modified PPS staple fibers had good antioxidant properties when the mass fractions of silane coupling agent(based on boron carbide)and boron carbide(based on PPS)were 0.7%and 1.2%,respectively,and the strength retention rate of the fibers reached 94.7%after concentrated sulfuric acid treatment,with a growth of 11.5%compared with that(84.9%)of unmodified PPS staple fibers treated with concentrated sulfuric acid;and the antioxidant mechanism of boron carbide modified PPS staple fibers was mainly that the boron carbide itself had good antioxidant properties and the dispersion and coupling effects of silane coupling agents also helped to improve the antioxidant properties of PPS short fibers.

关 键 词：聚苯硫醚纤维 碳化硼 共混改性 熔融纺丝 抗氧化性 

分 类 号：TQ342.7[化学工程—化纤工业]