CN104017357A - 一种高冲击、高加工流动性尼龙材料及其制备方法 - Google Patents
一种高冲击、高加工流动性尼龙材料及其制备方法 Download PDFInfo
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Abstract
本发明公开一种高冲击、高加工流动性尼龙材料,按照重量份数包括以下组分组成:混合树脂70~120份、相容剂2~6份、增韧剂5~15份。本发明还公开了一种高冲击/高加工流动性尼龙材料的制备方法。本发明提供的一种高冲击、高加工流动性尼龙材料在航天航空、汽车工业、电子电器等领域有着广泛应用前景。制备的尼龙材料具有高抗冲击性能,聚苯乙烯的引入在改善尼龙加工性能的同时也提高了尼龙材料在绝缘性能。
Description
技术领域
本发明属于高分子材料技术领域,具体涉及一种高冲击、高加工流动性尼龙材料及其制备方法。
背景技术
聚酰胺(PA)俗称尼龙,为五大工程塑料中产量最大、品种最多、用途最广的品种,其中PA6具有拉伸强度高、耐磨和自润滑性良好、冲击韧性好、耐油和耐弱酸弱碱性突出等优点,但其具有较大的吸水性、耐强酸强碱性差、干态和低温冲击强度低。
聚苯乙烯(PS)是产量仅次于聚乙烯、聚氯乙烯和聚丙烯的热塑性通用树脂,具有优良的透明性、廉价、刚性、电气性能、印刷性能和良好的加工流动性等特点;但其存在冲击强度低、耐热性差、易燃、化学稳定性比较差等缺点。
对于PS和PA6来说,其固有的缺点是限制其更广泛应用的重要因素,因此必须针对某一应用领域,通过改性,提高其某些性能,扩大其应用范围。随着相容剂技术的开发,PS与PA6的共混改性越来越得到迅速发展,二者共混取长补短可以期望获得较好性能的共混物,对于提高加工流动性能和冲击性能的尼龙材料的研究还没有相关报道。
发明内容
发明目的:本发明所要解决的第一个技术问题是提供了一种高冲击、高加工流动性尼龙材料。本发明所要解决的第二个技术问题是提供了上述一种高冲击、高加工流动性尼龙材料的制备方法。本发明以满足尼龙材料在不同场合的应用。通过引入聚苯乙烯来提高尼龙的加工流动性和改善尼龙的冲击性能,尼龙6树脂、聚苯乙烯树脂、相容剂、增韧剂混合后经双螺杆挤出混合,制备高冲击、高加工流动性尼龙材料。得到的新材料可控、综合物理机械性能好。
技术方案:为解决上述技术问题,本发明提供了一种高冲击、高加工流动性尼龙材料,按照重量份数包括以下组分组成:混合树脂70~120份、相容剂2~6份、增韧剂5~15份。
其中,上述混合树脂由50~80份尼龙6树脂和20~50份聚苯乙烯树脂制备而成。尼龙6是低熔融指数尼龙6。
其中,上述相容剂是尼龙6-聚苯乙烯树脂、聚苯乙烯-丙烯酸树脂中的一种或两种。
其中,上述增韧剂是三元乙丙橡胶-马来酸酐和乙烯-辛烯共聚物-马来酸酐按比例混合制得。
上述的一种高冲击/高加工流动性尼龙材料的制备方法,包括以下步骤:
1)混合树脂的制备:尼龙6树脂在90℃真空烘箱中干燥8~12个小时,将烘干后的尼龙6树脂、聚苯乙烯树脂、相容剂和增韧剂一起加入到高速混合机中,混合3~5分钟,得到混合树脂;其中,尼龙6树脂50~80份,聚苯乙烯树脂20~50份,相容剂2~6份,增韧剂5~15份;
2)高冲击/高加工流动性尼龙材料的制备:把步骤1)中的混合树脂投入到双螺杆挤出机的料斗内,反应温度控制在200℃~240℃,主机转速75~250r/min,喂料转速10~50r/min,经挤出、牵条、冷却、造粒,得到高性能尼龙材料。
其中,上述步骤1)中增韧剂是三元乙丙橡胶-马来酸酐和乙烯-辛烯共聚物-马来酸酐,按照重量份数,三元乙丙橡胶-马来酸酐 2~7份,乙烯-辛烯共聚物-马来酸酐2~8份。
其中,上述步骤2)中的双螺杆挤出机的直径为65,长径比为36:1~44:1。
其中,上述步骤2)中的双螺杆挤出机加料口到口模各段温度为170~190℃、170~190℃、170~190℃、190~200℃、190~210℃、190~220℃、200~230℃、200~230℃、200~230℃、210~240℃。
有益效果:与现有技术相比,本发明具有以下优点:本发明提供的一种高冲击/高加工流动性尼龙材料在航天航空、汽车工业、电子电器等领域有着广泛应用前景。制备的尼龙材料具有高抗冲击性能,聚苯乙烯的引入在改善尼龙加工性能的同时也提高了尼龙材料在绝缘性能。
具体实施方式
实施例1:
尼龙6树脂在90℃真空烘箱中干燥8~12个小时,将尼龙6树脂重量份80份、聚苯乙烯树脂重量份20份、相容剂重量份3份、增韧剂重量份5份一起加入到高速混合机中,进行混合,将混合后的物料投入到双螺杆挤出机的料斗中,挤出机的直径为65,长径比为40:1,从加料口到口模温度各段温度为:180,180,190,190,200,210,220,220,225,225℃,主机转速150r/min,喂料转速20r/min,经反应物料经挤出、牵引、冷却、造粒,得到尼龙材料。相容剂是尼龙6-聚苯乙烯树脂。增韧剂是三元乙丙橡胶-马来酸酐和乙烯-辛烯共聚物-马来酸酐混合制得,按照重量份数,三元乙丙橡胶-马来酸酐 2份,乙烯-辛烯共聚物-马来酸酐8份。该尼龙材料缺口冲击强度是24KJ/m2。
实施例2
尼龙6树脂在90℃真空烘箱中干燥8~12个小时,将尼龙6树脂重量份50份、聚苯乙烯树脂重量份50份、相容剂重量份5份、增韧剂重量份6份一起加入到高速混合机中,进行混合,将混合后的物料投入到双螺杆挤出机的料斗中,挤出机的直径为65,长径比为40:1,从加料口到口模温度各段温度为:180,180,190,190,200,210,220,220,225,225℃,主机转速150r/min,反应物料经挤出、牵引、冷却、造粒,得到尼龙材料。相容剂是尼龙6-聚苯乙烯树脂、聚苯乙烯-丙烯酸树脂混合而成。增韧剂是三元乙丙橡胶-马来酸酐和乙烯-辛烯共聚物-马来酸酐混合制得,按照重量份数,三元乙丙橡胶-马来酸酐7份,乙烯-辛烯共聚物-马来酸酐2份。该尼龙材料缺口冲击强度是12KJ/m2。
实施例3:
尼龙6树脂在90℃真空烘箱中干燥8~12个小时,将尼龙6树脂重量份80份、聚苯乙烯树脂重量份20份、相容剂重量份6份、增韧剂重量份10份一起加入到高速混合机中,进行混合,将混合后的物料投入到双螺杆挤出机的料斗中,挤出机的直径为65,长径比为40:1,从加料口到口模温度各段温度为:190,200,210,220,230,240,240,240,240,240℃,反应物料经挤出、牵引、冷却、造粒,得到尼龙材料。相容剂是聚苯乙烯-丙烯酸树脂。增韧剂是三元乙丙橡胶-马来酸酐和乙烯-辛烯共聚物-马来酸酐混合制得,混合比例:三元乙丙橡胶-马来酸酐 4,乙烯-辛烯共聚物-马来酸酐5。该尼龙材料缺口冲击强度是19KJ/m2。
实施例4:
尼龙6树脂在90℃真空烘箱中干燥8~12个小时,将尼龙6树脂重量份80份、聚苯乙烯树脂重量份20份、相容剂重量份6份、增韧剂重量份10份一起加入到高速混合机中,进行混合,将混合后的物料投入到双螺杆挤出机的料斗中,挤出机的直径为65,长径比为40:1,从加料口到口模温度各段温度为:190,200,210,220,230,240,240,240,240,240℃,反应物料经挤出、牵引、冷却、造粒,得到尼龙材料。相容剂是聚苯乙烯-丙烯酸树脂。增韧剂是三元乙丙橡胶-马来酸酐和乙烯-辛烯共聚物-马来酸酐混合制得,按照重量份数,三元乙丙橡胶-马来酸酐 5份,乙烯-辛烯共聚物-马来酸酐6份。该尼龙材料缺口冲击强度是16KJ/m2。
实施例5:
尼龙6树脂在90℃真空烘箱中干燥8~12个小时,将尼龙6树脂重量份65份、聚苯乙烯树脂重量份35份、相容剂重量份2份、增韧剂重量份7份一起加入到高速混合机中,进行混合,将混合后的物料投入到双螺杆挤出机的料斗中,挤出机的直径为65,长径比为44:1,从加料口到口模温度各段温度为:180,180,190,190,200,210,220,220,225,225℃,主机转速300r/min,经反应物料经挤出、牵引、冷却、造粒,得到尼龙材料。相容剂是尼龙6-聚苯乙烯树脂、聚苯乙烯-丙烯酸树脂混合而成。增韧剂是三元乙丙橡胶-马来酸酐和乙烯-辛烯共聚物-马来酸酐混合制得,按照重量份数,三元乙丙橡胶-马来酸酐 2份,乙烯-辛烯共聚物-马来酸酐8份。该尼龙材料缺口冲击强度是21KJ/m2。
实施例6:
尼龙6树脂在90℃真空烘箱中干燥8~12个小时,将尼龙6树脂重量份80份、聚苯乙烯树脂重量份20份、相容剂重量份4份、增韧剂重量份8份一起加入到高速混合机中,进行混合,将混合后的物料投入到双螺杆挤出机的料斗中,挤出机的直径为65,长径比为36:1,从加料口到口模温度各段温度为:180,180,190,190,200,210,220,220,225,225℃,主机转速500r/min,反应物料经挤出、牵引、冷却、造粒,得到尼龙材料。相容剂是尼龙6-聚苯乙烯树脂、聚苯乙烯-丙烯酸树脂混合而成。增韧剂是三元乙丙橡胶-马来酸酐和乙烯-辛烯共聚物-马来酸酐混合制得,按照重量份数,三元乙丙橡胶-马来酸酐 2份,乙烯-辛烯共聚物-马来酸酐8份。该尼龙材料缺口冲击强度是16KJ/m2。
以上所述仅是本发明的优选实施方式,应当指出:对于本技术领域的技术人员来说,在不脱离本发明原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。
Claims (8)
1.一种高冲击、高加工流动性尼龙材料,其特征在于,按照重量份数包括以下组分组成:混合树脂70~120份、相容剂2~6份、增韧剂5~15份。
2.根据权利要求1所述的一种高冲击、高加工流动性尼龙材料,其特征在于,所述混合树脂由50~80份尼龙6树脂和20~50份聚苯乙烯树脂制备而成。
3.根据权利要求1所述的一种高冲击、高加工流动性尼龙材料,其特征在于,所述相容剂是尼龙6-聚苯乙烯树脂、聚苯乙烯-丙烯酸树脂中的一种或两种。
4.根据权利要求1所述的一种高冲击、高加工流动性尼龙材料,其特征在于,所述增韧剂是三元乙丙橡胶-马来酸酐和乙烯-辛烯共聚物-马来酸酐按比例混合制得。
5.权利要求1所述的一种高冲击、高加工流动性尼龙材料的制备方法,其特征在于,包括以下步骤:
1)混合树脂的制备:尼龙6树脂在90℃真空烘箱中干燥8~12个小时,将烘干后的尼龙6树脂、聚苯乙烯树脂、相容剂和增韧剂一起加入到高速混合机中,混合3~5分钟,得到混合树脂;其中,尼龙6树脂50~80份,聚苯乙烯树脂20~50份,相容剂2~6份,增韧剂5~15份;
2)高冲击、高加工流动性尼龙材料的制备:把步骤1)中的混合树脂投入到双螺杆挤出机的料斗内,反应温度控制在200℃~240℃,主机转速75~250r/min,喂料转速10~50r/min,经挤出、牵条、冷却、造粒,得到高性能尼龙材料。
6.根据权利要求5所述的一种高冲击、高加工流动性尼龙材料的制备方法,其特征在于,所述步骤1)中增韧剂是三元乙丙橡胶-马来酸酐和乙烯-辛烯共聚物-马来酸酐,按照重量份数,三元乙丙橡胶-马来酸酐 2~7份,乙烯-辛烯共聚物-马来酸酐2~8份。
7.根据权利要求5所述的一种高冲击、高加工流动性尼龙材料的制备方法,其特征在于,所述步骤2)中的双螺杆挤出机的直径为65,长径比为36:1~44:1。
8.根据权利要求5所述的一种高冲击、高加工流动性尼龙材料的制备方法,其特征在于,所述步骤2)中的双螺杆挤出机加料口到口模各段温度为170~190℃、170~190℃、170~190℃、190~200℃、190~210℃、190~220℃、200~230℃、200~230℃、200~230℃、210~240℃。
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