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摘要
采用熔融共混的方法,制备系列共混组成比的聚酰胺6/季戊四醇磷酸酯(PA6/PEPA)复合物,并对其结构和性能进行分析。结果表明,PEPA在与PA6熔融共混过程中并未发生化学反应,并均匀分散于PA6基体中;PEPA对PA6具有一定的增塑作用,复合物的玻璃化转变温度、冷结晶及热结晶温度均降低,复合物的结晶度下降。在PEPA用量低于10%(wt,质量分数,下同)时,复合物的断裂强度基本不变,其后随着PEPA用量的增加,断裂强度逐渐降低,但断裂伸长率呈明显上升的趋势;动态力学分析表明复合物的弹性模量和Tg均呈下降趋势;阻燃测试结果表明,PEPA可以提高PA6的阻燃性能。当其用量为20%时,复合物的残炭量增加至17.9%,LOI提高至27%,燃烧时复合物的总释放热、质量损失速率和总燃烧时间降低,但并未改善PA6的抗熔滴性能。
Abstract
The structure and property of polyamide 6,melt processed with various amounts of PEPA,was examined.It was concluded that there was not chemical reaction between PA6 and PEPA during melt blending,it was homogeneously dispersed in PA6 matrix.PEPA had a certain plasticizing effect on PA6,which lead to the reduction of Tg,Tc and Tcc,as well the crystallinity of composites were decreased.The fracture strength was not changed when the mass fraction of PEPA was less than 10%,but the stiffness was decreased and the elongation at break was increased along with the increasing of PEPA.The additives were also shown to pull down the elasticity modulus and Tg in the dynamic mechanical analysis.PEPA also exerted a positive effect on the flame retardancy of PA6,led the solid residue and LOI reach to 17.9% and 27% with 20% PEPA.However,the total heat release,mass loss rate and total combustion time were all decreased during combustion,but did not improving the performance of PA6 anti-droplet.
关键词
磷系阻燃剂
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季戊四醇磷酸酯
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PA6
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阻燃性能
Key words
phosphorus-based flame retardant
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pentaerythritol octahydrogen tetraphosphate (PEPA)
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polyamide-6(PA6)
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flame retardant property
PA6/PEPA复合物的制备及结构性能研究[J].
化工新型材料, 2018, 46(1): 144-149 DOI:
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