CN105218776A - 一种聚氨酯基石墨碳晶板及其制备方法 - Google Patents

一种聚氨酯基石墨碳晶板及其制备方法 Download PDF

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CN105218776A
CN105218776A CN201510756042.2A CN201510756042A CN105218776A CN 105218776 A CN105218776 A CN 105218776A CN 201510756042 A CN201510756042 A CN 201510756042A CN 105218776 A CN105218776 A CN 105218776A
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葛铁军
王毅
刘浪
肖尚雄
王佳
周志阳
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Shenyang University of Chemical Technology
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Abstract

一种聚氨酯基石墨碳晶板及其制备方法,涉及一种塑胶材料及其制备方法,本发明首先在80℃条件下将回收聚碳酸酯鼓风干燥6~8小时;按重量配比称取干燥好的回收聚碳酸酯、交联母料、无机填料投入到高混机中混合4~6min,采用双螺杆挤出机于220℃-280℃下挤出造粒即得产品。传统回收方法通过增加弹性体增韧剂进行增韧,通常会导致聚碳酸酯回料的拉伸性能下降,从而影响整体的力学性能;本发明的技术方案能同时实现增强、增韧回收聚碳酸酯的效果,而且同质异构交联法的引入可以使回收聚碳酸酯的再生过程中无需加入相容剂也可以使再生聚碳酸酯的韧性和强度很好,极具市场推广价值。

Description

一种聚氨酯基石墨碳晶板及其制备方法
技术领域
本发明涉及一种塑胶材料及其制备方法,特别是涉及一种聚氨酯基石墨碳晶板及其制备方法。
背景技术
聚碳酸酯(简称PC)是分子链中含有碳酸酯基的高分子聚合物,根据酯基的结构可分为脂肪族、芳香族、脂肪族-芳香族等多种类型。其中由于脂肪族和脂肪族-芳香族聚碳酸酯的机械性能较低,从而限制了其在工程塑料方面的应用。目前仅有芳香族聚碳酸酯获得了工业化生产。由于聚碳酸酯结构上的特殊性,现已成为五大工程塑料中增长速度最快的通用工程塑料。
PC是几乎无色的玻璃态的无定形聚合物,有很好的光学性。PC高分子量树脂有很高的韧性,悬臂梁缺口冲击强度为600-900J/m,未填充牌号的热变形温度大约为130°C,玻璃纤维增强后可使这个数值增加10°C。PC的弯曲模量可达2400MPa以上,树脂可加工制成大的刚性制品。低于100°C时,在负载下的蠕变率很低。PC耐水解性差,不能用于重复经受高压蒸汽的制品。PC主要性能缺陷是耐水解稳定性不够高,对缺口敏感,耐有机化学品性,耐刮痕性较差,长期暴露于紫外线中会发黄。和其他树脂一样,PC容易受某些有机溶剂的浸浊。
近年来,随着工业发展的需求,人们对聚碳酸酯的改性研究也越发的关注。改性PC的目的是为了增韧,改良成型加工性能,减少残余变形,增加阻燃性等,具体能改性PC的品种有:PC/ABS可提高弯曲模量、耐热性、电镀性能等。PC/PET、PBT可改善耐药品性,耐溶剂料性等。PC/PMMA加入有机玻璃可提高外观珠光色彩。PC/PA、HIPS可提高冲击韧性、表面光洁度。PC/HDPE可改善耐沸水性、耐老化性、耐气候性,而LDPE效果较差。PC用玻纤或碳纤维进行增强改性,提高机械强度。并用溴类阻燃剂和三氧化二锑,可制成阻燃级PC。
发明内容
本发明的目的在于提供一种聚氨酯基石墨碳晶板及其制备方法,该方法通过同质异构交联法技术,可以在增韧的同时实现增强的效果,解决因使用弹性体增韧导致拉伸强度下降的问题,而且同质异构交联法的引入可以使回收聚碳酸酯的再生过程中无需加入相容剂也可以使再生聚碳酸酯具有较好的整体力学性能,从而可以再次使用,极具市场推广价值。
本发明的目的是通过以下技术方案实现的:
一种聚氨酯基石墨碳晶板,所述晶板由聚合物多元醇、多异氰酸酯、催化剂、扩链剂、石墨碳晶组份制成:官能度为2、数均分子量为2500~3000的聚合物多元醇75%~90%,
多异氰酸酯10%~25%,催化剂0.1~0.3%,扩链剂4%~5%,石墨碳晶50%。
所述的一种聚氨酯基石墨碳晶板,官能度为2、数均分子量为2000~3000的聚合物多元醇为PEA2000、PEA3000、PCL2000、PPG3000、PPG2000、PTMG2000中的一种或多种。
所述的一种聚氨酯基石墨碳晶板,多异氰酸酯为TDI-80、TDI-100、MDI-100、MDI-50、液化MDI中的一种。
所述的一种聚氨酯基石墨碳晶板,催化剂为二丁基二月桂酸锡、三亚乙基二胺、三乙醇胺中的一种。
所述的一种聚氨酯基石墨碳晶板,扩链剂为1,4-丁二醇(BDO)、3,3’二氯-4,4’二苯基甲烷二胺(MOCA)、3,5-二甲硫基甲苯二胺(DADMT)中的一种。
一种聚氨酯基石墨碳晶板的制备方法,所述方法包括以下制备步骤:
(1)预聚体制备
聚合物多元醇和增塑剂混合脱水至水分小于0.05%,与计量二异氰酸酯和催化剂在75~80°C反应2~3小时,得到预聚体;
(2)浇注聚氨酯弹性体的制备
将预聚体在80°C下与计量扩链剂混合、脱气,倒入预热的模具中,待凝胶后合模,于100°C下平板硫化30min,同时加入在表面平铺一定质量份的石墨碳晶粉得到一种聚氨酯基石墨碳晶板。
本发明的优点与效果是:
本发明通过同质异构交联法技术,可以在增韧的同时实现增强的效果,解决因使用弹性体增韧导致拉伸强度下降的问题,而且同质异构交联法的引入可以使回收聚碳酸酯的再生过程中无需加入相容剂也可以使再生聚碳酸酯具有较好的整体力学性能,从而可以再次使用,极具市场推广价值。
具体实施方式
下面结合实施例对本发明进行详细说明。
实施例1-3,各实施例中各组份的重量分配比如表1所示。把各组份按配比称取,于高速搅拌机中混合5分钟,出料,将混合料的原料置于双螺杆挤出机中造料,挤出机的温度在220℃-280℃,转速150r/min。制备样条,按相应的标准测试(见表2)性能结果见表3。
表1:实施例1-3以及对比例1的配方组成(份)
表2:力学性能测试标准
表3:实施例1-3中再生聚碳酸酯的力学性能测试
从表3实施例1-3以及对比例1的力学性能测试结果,我们可知:在单纯使用增韧剂的时候,提高回收聚碳酸酯冲击性能的同时会降低材料的拉伸性能;采用同质异构交联法后,用交联母料提高回收聚碳酸酯冲击性能的同时也可以提高回收聚碳酸酯的拉伸性能;而且同质异构交联法的引入可以使回收聚碳酸酯的再生过程中无需加入相容剂也可以使再生聚碳酸酯的韧性和强度很好;同质异构交联法对回收聚碳酸酯的弯曲强度和弯曲模量基本没有影响。

Claims (6)

1.一种聚氨酯基石墨碳晶板,其特征在于:所述晶板由聚合物多元醇、多异氰酸酯、催化剂、扩链剂、石墨碳晶组份制成:官能度为2、数均分子量为2500~3000的聚合物多元醇75%~90%,
多异氰酸酯10%~25%,催化剂0.1~0.3%,扩链剂4%~5%,石墨碳晶50%。
2.根据权利要求1所述的一种聚氨酯基石墨碳晶板,其特征在于:官能度为2、数均分子量为2000~3000的聚合物多元醇为PEA2000、PEA3000、PCL2000、PPG3000、PPG2000、PTMG2000中的一种或多种。
3.根据权利要求1所述的一种聚氨酯基石墨碳晶板,其特征在于:多异氰酸酯为TDI-80、TDI-100、MDI-100、MDI-50、液化MDI中的一种。
4.根据权利要求1所述的一种聚氨酯基石墨碳晶板,其特征在于:催化剂为二丁基二月桂酸锡、三亚乙基二胺、三乙醇胺中的一种。
5.根据权利要求1所述的一种聚氨酯基石墨碳晶板,其特征在于:扩链剂为1,4-丁二醇(BDO)、3,3’二氯-4,4’二苯基甲烷二胺(MOCA)、3,5-二甲硫基甲苯二胺(DADMT)中的一种。
6.一种聚氨酯基石墨碳晶板的制备方法,其特征在于,所述方法包括以下制备步骤:
(1)预聚体制备
聚合物多元醇和增塑剂混合脱水至水分小于0.05%,与计量二异氰酸酯和催化剂在75~80°C反应2~3小时,得到预聚体;
(2)浇注聚氨酯弹性体的制备
将预聚体在80°C下与计量扩链剂混合、脱气,倒入预热的模具中,待凝胶后合模,于100°C下平板硫化30min,同时加入在表面平铺一定质量份的石墨碳晶粉得到一种聚氨酯基石墨碳晶板。
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101914347A (zh) * 2010-08-06 2010-12-15 龚亮 碳纳米管复合碳晶涂料及其制备碳素晶体电热材料的方法
CN104144531A (zh) * 2014-08-08 2014-11-12 苏州宏久航空防热材料科技有限公司 一种高发热碳晶板及其制备方法
CN104448197A (zh) * 2014-12-16 2015-03-25 山东一诺威聚氨酯股份有限公司 耐热性聚氨酯弹性体的合成方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101914347A (zh) * 2010-08-06 2010-12-15 龚亮 碳纳米管复合碳晶涂料及其制备碳素晶体电热材料的方法
CN104144531A (zh) * 2014-08-08 2014-11-12 苏州宏久航空防热材料科技有限公司 一种高发热碳晶板及其制备方法
CN104448197A (zh) * 2014-12-16 2015-03-25 山东一诺威聚氨酯股份有限公司 耐热性聚氨酯弹性体的合成方法

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Application publication date: 20160106