原位聚合无卤阻燃3D打印PA 6粉末的制备及表征
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摘要
在己内酰胺(CPL)水解开环悬浮聚合体系中加入三聚氰胺氰尿酸(MCA)单体盐,制备了可用于3D打印的无卤阻燃聚酰胺6(FRPA 6)粉末材料,在打印机上烧结成形,研究了MCA单体盐的加入对制品力学性能及阻燃性能的影响,并对FRPA 6形貌及性能进行了表征。结果表明:在悬浮聚合体系中,MCA的自组装反应进行比较充分,生成的MCA均匀分散在FRPA 6中,达到纳米级别;随着体系中MCA含量的增加,FRPA 6的熔点、抗冲击强度、拉伸强度和弯曲强度有所下降,断裂伸长率、结晶温度有所提高,当MCA质量分数为8%时,FRPA 6阻燃性能达到UL94 V-0级,拉伸强度为62.4 MPa,缺口冲击强度为7.4 k J/m~2,弯曲强度为64.7 MPa。
Halogen-free flame retardant polyamide 6( FRPA 6) powder for 3D print was prepared by adding melamine cyanurate( MCA) into caprolactam( CPL) hydrolytic ring opening suspension polymerization system and was sinter-moulded in a printer.The effect of the addition of MCA on the mechanical properties and flame retardance of the product was studied. The morphology and properties of FRPA 6 were characterized. The results showed that the self-assembly reaction of MCA proceeded comparatively well in the suspension polymerization system; the produced MCA uniformly dispersed in FRPA 6 in nanometer scale; the melting point,impact strength,tensile strength and bending strength of FRPA 6 were decreased and the elongation at break and the crystallization temperature were increased in some degree when the content of MCA was increased in the suspension system; and the flame retardance of FRPA 6 reached UL94 V-0 and the tensile strength,notched impact strength and bending strength were 62. 4 MPa,7. 4 k J/m~2,64. 7 MPa,respectively,when the mass fraction of MCA was 8%.
Halogen-free flame retardant polyamide 6( FRPA 6) powder for 3D print was prepared by adding melamine cyanurate( MCA) into caprolactam( CPL) hydrolytic ring opening suspension polymerization system and was sinter-moulded in a printer.The effect of the addition of MCA on the mechanical properties and flame retardance of the product was studied. The morphology and properties of FRPA 6 were characterized. The results showed that the self-assembly reaction of MCA proceeded comparatively well in the suspension polymerization system; the produced MCA uniformly dispersed in FRPA 6 in nanometer scale; the melting point,impact strength,tensile strength and bending strength of FRPA 6 were decreased and the elongation at break and the crystallization temperature were increased in some degree when the content of MCA was increased in the suspension system; and the flame retardance of FRPA 6 reached UL94 V-0 and the tensile strength,notched impact strength and bending strength were 62. 4 MPa,7. 4 k J/m~2,64. 7 MPa,respectively,when the mass fraction of MCA was 8%.
引文
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[3]Theysohn R,Reimann H.Flameproofed filled nylon moldingmaterials:US,4314927[P].1982-02-09.
[4]Kawasaki H,Yoshida K,Itoh T.Flame-retardant polyamide resin composition with melamine cyanurate uniformly dispersedtherein:US,4317766[P].1982-03-02.
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