CN106317639A - 玻纤增强聚丙烯回收料及其制备方法 - Google Patents
玻纤增强聚丙烯回收料及其制备方法 Download PDFInfo
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Abstract
本发明公开了一种中碱玻纤增强聚丙烯回收料,该材料由以下重量份的组分制成:聚丙烯回料30~75份、聚丙烯10~30份、聚丙烯接枝丙烯酸5~15份、中碱玻纤10~25份、抗氧剂0.2~1份、三聚氰酸三烯丙酯0.5~2份。本发明还公开了该中碱玻纤增强聚丙烯回收料的制备方法。本发明通过在聚丙烯回料中加入聚丙烯接枝马来酸酐引入强极性反应性基团,使材料具有高的极性和反应性,极大的改善了聚丙烯与纤维的相容性;同时,利用洗衣机筒废料,使其得到合理再利用,会节约资源,保护环境,减少浪费。
Description
技术领域
本发明属于高分子材料改性技术领域和加工技术领域,具体涉及一种玻纤增强聚丙烯回收料及其制备方法。
背景技术
聚丙烯是一种热塑性塑料,比重轻,成品表面硬度大,弹性高,耐热性、化学稳定性、绝缘性良好,在汽车零部件、家用电器等领域得到广泛的应用。但是随着工业的发展,聚丙烯的废弃量逐年增加,近年来,废旧塑料的回收问题越来越得到大家的关注,很多企业开始进行回收料的再改性。
聚丙烯洗衣机筒一般为共聚聚丙烯材料,填充少、熔融指数高、抗冲击高。我国每年会报废几百万台的洗衣机,且以年均20%速度在增长。由此产生的洗衣机筒废料若能得到合理再利用,会节约资源,保护环境,减少浪费。
回收聚丙烯材料因老化、降解,其性能已经明显衰减,回收料的再次造粒过程中,聚丙烯链段会再次破坏和降解,因此为了更好的利用回收料,一般会进行再改性,提高聚丙烯的强度和耐老化性能。
玻璃纤维对塑料的增强作用非常明显,并被广泛应用于塑料的增强改性中。无碱玻纤具有优良的化学稳定性、电绝缘性和力学性能,主要用于增强塑料,目前在汽车上面无碱玻纤增强聚丙烯材料已经得到广泛应用。
中碱玻纤的碱金属含量高于无碱玻纤,其机械强度不如无碱玻纤,但是来源丰富,价格便宜,用中碱玻纤改性聚丙烯材料来替代无碱玻纤增强聚丙烯材料,可以降低成本,而聚丙烯回收料的使用,可以进一步降低材料成本,给企业带来利润。
发明内容
本发明的目的是提供一种具有优异的刚韧平衡性能的玻纤增强聚丙烯回收料。
本发明的另一目的是提供一种上述聚丙烯回收料的制备方法。
本发明的技术方案如下:
本发明提供了一种中碱玻纤增强聚丙烯回收料,该材料由以下重量份的组分制成:
聚丙烯回料:30~75份
聚丙烯:10~30份
聚丙烯接枝丙烯酸:5~15份
中碱玻纤:10~25份
抗氧剂:0.2~1份
三聚氰酸三烯丙酯 :0.5~2份。
所述聚丙烯熔融指数为40~100 g/10min(测试条件为:230℃,2.16Kg)。
所述聚丙烯回料为:废旧聚丙烯洗衣机筒回收料,其灰分为:2~10%,密度为0.91~0.98g/cm3。熔融指数为10~40g/10min,测试条件为:230℃,2.16Kg。
所述的聚丙烯接枝丙烯酸的接枝率≥1.5%,重均分子量≥20000。
所述的抗氧剂包括主抗氧剂和辅抗氧剂。所述的主抗氧剂可以选用受阻酚和硫酯类抗氧剂中的一种或者几种,优选抗氧剂1010(化学名称:四[β-(3,5-二叔丁基-4-羟基苯基)丙酸]季戊四醇酯)以及抗氧剂1076(化学名称:β-(4’-羟基-3’,5’-二叔丁基苯基)丙酸十八醇酯)中的至少一种。所述的辅抗氧剂选自亚磷酸盐和酯类抗氧剂中的一种或者几种,优选抗氧剂168,化学名称:三(2,4-二叔丁基苯基)亚磷酸酯。主抗氧剂和辅抗氧剂的重量比为1:1。
所述的玻璃纤维为中碱长玻璃纤维,单丝直径为20~30微米。
所述的三聚氰酸三烯丙酯含水量≤0.1%。
本发明的聚丙烯回收料的制备方法包括以下步骤,将30~75份聚丙烯回料、10~30份聚丙烯、5~15份聚丙烯接枝丙烯酸、0.2~1份抗氧剂和0.5~2份三聚氰酸三烯丙酯 放入高速混合机中混合3~5分钟,然后将混合物加入挤出机中,将10~25份中碱玻纤从玻纤口加入,挤出切粒得到所需中碱玻纤增强聚丙烯回收料。
所述的挤出机为双螺杆挤出机,挤出机的料筒温度为180~220 ℃。
本发明的有益效果:
(1)本发明通过在聚丙烯回料中加入聚丙烯接枝丙烯酸引入强极性反应性基团,使材料具有高的极性和反应性,极大的改善了聚丙烯与纤维的相容性;
(2)三聚氰酸三烯丙酯与聚丙烯接枝丙烯酸共同作用达到与聚合物的紧密结合,使材料的强度、黏结力、分散性能等显著提高,最终使制得的组合物具有良好的分散性、相容性、优异的刚韧平衡性,可用于对刚韧平衡性有较高要求产品的制作如汽车车门踏步本体。
(3)本发明利用洗衣机筒废料,使其得到合理再利用,会节约资源,保护环境,减少浪费。
具体实施方式
以下结合实施例对本发明作进一步的说明。
材料的综合力学性能通过测试所得的拉伸强度、弯曲强度、冲击强度以及密度的数值进行判断,性能测试结果见表1。
实施例
1
将75份聚丙烯回料、10份聚丙烯、5份聚丙烯接枝丙烯酸、0.2份抗氧剂(抗氧剂1010:抗氧剂168=1:1,重量比)和0.5份三聚氰酸三烯丙酯 放入高速混合机中混合3分钟,然后将混合物加入挤出机中,将10份中碱玻纤从玻纤口加入,挤出切粒得到所需中碱玻纤增强聚丙烯回收料。
双螺杆挤出机的料筒各区段温度分别设置为:一区180℃、二区185℃、三区195℃、四区195℃、五区200℃、六区200℃、机头205℃。挤出条通过循环水槽冷却至室温,经过吹风机干燥后进入切粒机造粒。
实施例
2
将30份聚丙烯回料、30份聚丙烯、15份聚丙烯接枝丙烯酸、0.4份抗氧剂(抗氧剂1010:抗氧剂168=1:1,重量比)和1.3份三聚氰酸三烯丙酯 放入高速混合机中混合4分钟,然后将混合物加入挤出机中,将25份中碱玻纤从玻纤口加入,挤出切粒得到所需中碱玻纤增强聚丙烯回收料。
双螺杆挤出机的料筒各区段温度分别设置为:一区180℃、二区185℃、三区195℃、四区195℃、五区210℃、六区220℃、机头205℃。挤出条通过循环水槽冷却至室温,经过吹风机干燥后进入切粒机造粒。
实施例
3
将52份聚丙烯回料、20份聚丙烯、10份聚丙烯接枝丙烯酸、1份抗氧剂(抗氧剂1076:抗氧剂168=1:1,重量比)和2份三聚氰酸三烯丙酯 放入高速混合机中混合5分钟,然后将混合物加入挤出机中,将18份中碱玻纤从玻纤口加入,挤出切粒得到所需中碱玻纤增强聚丙烯回收料。
聚丙烯A为废旧聚丙烯洗衣机筒回收料,聚丙烯B为北京燕山石油化工有限公司的共聚聚丙烯材料PP K7760。双螺杆挤出机的料筒各区段温度分别设置为:一区180℃、二区185℃、三区195℃、四区195℃、五区200℃、六区200℃、机头205℃。挤出条通过循环水槽冷却至室温,经过吹风机干燥后进入切粒机造粒。
上述实施例生产的材料的性能如表1所示。上述实施例生产的材料具有优异的刚韧平衡性能。
表1
测试项目 | 实施例1 | 实施例2 | 实施例3 | 聚丙烯 | 聚丙烯回料 | 检测标准 |
密度(g/cm3) | 0.97 | 1.08 | 1.03 | 0.9 | 1.10 | GB/T 1033 |
拉伸强度(MPa) | 64 | 77 | 65 | 28 | 16 | GB/T 1040 |
弯曲强度(MPa) | 84 | 112 | 81 | 42 | 23 | GB/T 9341 |
弯曲模量(MPa) | 3156 | 3152 | 2586 | 1852 | 986 | GB/T 9341 |
简支梁缺口冲击强度(KJ/m2) | 17 | 17 | 15 | 14 | 9 | GB/T 1043 |
简支梁无缺口冲击强度(KJ/m2) | 62 | 81 | 59 | 54 | 26 | GB/T 1043 |
表1中,聚丙烯回料为废旧聚丙烯洗衣机筒回收料,聚丙烯为北京燕山石油化工有限公司的共聚聚丙烯材料PP K7760。
上述的对实施例的描述是为便于该技术领域的普通技术人员能理解和应用本发明。熟悉本领域技术的人员显然可以容易地对这些实施例做出各种修改,并把在此说明的一般原理应用到其他实施例中而不必经过创造性的劳动。因此,本发明不限于这里的实施例,本领域技术人员根据本发明的揭示,不脱离本发明范畴所做出的改进和修改都应该在本发明的保护范围之内。
Claims (9)
1.一种玻纤增强聚丙烯回收料,由以下重量份的组分制成:
聚丙烯回料:
30~75份
聚丙烯:
10~30份
聚丙烯接枝丙烯酸:
5~15份
中碱玻纤:
10~25份
抗氧剂:
0.2~1份
三聚氰酸三烯丙酯: 0.5~2份。
2.根据权利要求1所述玻纤增强聚丙烯回收料,其特征在于,所述聚丙烯回料为:废旧聚丙烯洗衣机筒回收料,其灰分为:2~10%,密度为0.91~0.98g/cm3,熔融指数为10~40g/10min,测试条件为:230℃,2.16Kg。
3.根据权利要求1所述玻纤增强聚丙烯回收料,其特征在于,所述聚丙烯熔融指数为40~100 g/10min,测试条件为:230℃,2.16Kg。
4.根据权利要求1所述玻纤增强聚丙烯回收料,其特征在于,所述聚丙烯接枝丙烯酸的接枝率≥1.5%,重均分子量≥20000。
5.根据权利要求1所述玻纤增强聚丙烯回收料,其特征在于,所述的抗氧剂包括主抗氧剂和辅抗氧剂;所述的主抗氧剂选用四[β-(3,5-二叔丁基-4-羟基苯基)丙酸]季戊四醇酯、β-(4’-羟基-3’,5’-二叔丁基苯基)丙酸十八醇酯中的至少一种,所述的辅抗氧剂选自三(2,4-二叔丁基苯基)亚磷酸酯。
6.根据权利要求1所述玻纤增强聚丙烯回收料,其特征在于,所述的中碱玻纤为中碱长玻璃纤维,单丝直径为20~30微米。
7.根据权利要求1所述玻纤增强聚丙烯回收料,其特征在于,所述的三聚氰酸三烯丙酯含水量≤0.1%。
8.权利要求1-7任一项所述玻纤增强聚丙烯回收料的制备方法,包括步骤:将30~75份聚丙烯回料、10~30份聚丙烯、5~15份聚丙烯接枝丙烯酸、0.2~1份抗氧剂和0.5~2份三聚氰酸三烯丙酯放入高速混合机中混合3~5分钟,然后将混合物加入挤出机中,将10~25份中碱玻纤从玻纤口加入,挤出切粒得到玻纤增强的聚丙烯回收料。
9.根据权利要求8所述玻纤增强聚丙烯回收料的制备方法,其特征在于,所述的挤出机为双螺杆挤出机,挤出机的料筒温度为180~220
℃。
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CN114031859A (zh) * | 2021-12-15 | 2022-02-11 | 广东特帅科技股份有限公司 | 一种用于生鲜产品储运的高耐寒抗uv智慧周转框的高分子改性材料 |
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