以亲脂化改性层状磷酸锆(OZrP)为填料,聚对苯二甲酸乙二醇酯(PET)为基体,通过熔融共混法制备了OZrP含量不同的OZrP/PET复合材料,研究了OZrP对PET阻燃性能和力学性能的影响。结果表明:在层状磷酸锆(α-ZrP)表面引入亲脂性基团,改善了其与PET基体的相容性;OZrP的加入显著提高了复合材料的极限氧指数(LOI),低添加量下复合材料就表现出良好的阻燃性,5%OZrP/PET复合材料的LOI值达到32%以上;复合材料具有良好的热稳定性和热氧稳定性,燃烧后炭层的完整性和石墨化程度明显改善;在力学性能方面,虽然复合材料的拉伸强度随OZrP含量增加而略有下降,但OZrP质量分数为2%的OZrP/PET复合材料强度保持率仍可到95%以上,且具有熔融可纺性,熔融纺丝制备的OZrP/PET复合纤维和织物也表现出良好的阻燃性能,有望应用于PET塑料及纤维防火阻燃领域。
Lipophilically modified layered zirconium phosphate (OZrP) was used as a filler and polyethylene terephthalate (PET) as the matrix to prepare OZrP/PET composites with different OZrP contents via the melt-blending method.The effects of OZrP on the flame-retardant and mechanical properties of PET were investigated.The results demonstrated that the introduction of lipophilic groups onto the surface of layered zirconium phosphate (α-ZrP) improved its compatibility with the PET matrix.The addition of OZrP significantly increased the limiting oxygen index (LOI) of the composites.Even at low addition levels,the composite exhibited excellent flame-retardant properties,and the LOI value of the 5% OZrP/PET composite exceeded 32%.The composites exhibited enhanced thermal stability and thermal-oxidative stability,with marked improvements in the integrity and graphitization degree of the char layer after combustion.In terms of mechanical properties,although the tensile strength of the composites slightly decreased with increasing OZrP content,the strength retention of the 2% OZrP/PET composite resin remained above 95%.Moreover,the composite possessed melt-spinnability,and the resulting composite fibers and fabrics exhibited good flame-retardant properties,showing potential for application in the fire-retardant and flame-retardant fields of PET plastics and fibers.
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基金资助
浙江省科技计划项目“尖兵”“领雁”研发攻关计划(2023C01205);云浮市2023年创新团队项目(CYRC202305)
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