CN104292576A - 一种抗老化pe管材的制备方法 - Google Patents

一种抗老化pe管材的制备方法 Download PDF

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CN104292576A
CN104292576A CN201410337346.0A CN201410337346A CN104292576A CN 104292576 A CN104292576 A CN 104292576A CN 201410337346 A CN201410337346 A CN 201410337346A CN 104292576 A CN104292576 A CN 104292576A
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方家红
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Abstract

本发明公开了一种抗老化PE管材，其特征在于由下列重量的原料组成：PE树脂95.0kg～99.0kg，抗氧化剂0.5kg～2.0kg，紫外线屏蔽剂0.1kg～1.5kg，紫外线吸收剂0.2kg～0.5kg，淬灭剂0kg～0.2kg，自由基捕获剂0.2kg～0.8kg。本发明抗老化体系相互间具有良好的协同作用，抗氧化性强，挥发性小，与PE树脂相溶性好；不影响材料力学性能，耐高温，热稳定性好。

Description

一种抗老化PE管材的制备方法
技术领域
本发明涉及一种PE管材制备方法，具体涉及一种抗老化PE管材的制备方法。 
背景技术
聚乙烯为典型的热塑性塑料，由于PE管材具有无毒、无味、无臭、良好的耐寒、耐热性和化学稳定性、较高的刚性和韧性，以及机械性能好、安装方便等诸多优点，被广泛的应用于建筑给、排水，埋地排水管、输气管及电讯工程等领域。 
聚乙烯化学稳定性较好，在室温条件下可耐酸，但不耐强氧化的腐蚀。然而由于PE管材自身结构的特点，它的抗老化性能较差，因而在使用过程中，提高其抗老化性能是最关键的指标之一。因而需要对PE管材进行改良，使其具有较好的抗老化性能，延长使用年限和扩展使用范围。 
改善PE管材抗老化性能的方法主要是在PE树脂中添加光稳定剂或抗氧剂，或者将两者并用，通过屏蔽紫外光、吸收紫外光、捕获自由基、分解过氧化物等途径来提高PE及其复合物的抗光老化和热氧老化性能。但如何选择合适的抗老化体系来满足对不同材料的防老化性能要求则是问题的关键。 
发明内容
本实用发明所要解决的技术问题是提供一种抗老化PE管材，克服现有PE管材抗老化体系不稳定的缺陷。 
为了解决上述问题，本发明提供的技术方案： 
一种抗老化PE管材，其特征在于由下列重量的原料组成 
所述抗氧化剂可以是1,3,5-三甲基-2,4,6-(3,5-二叔丁基-4-羟基苯甲基)苯、硫代二丙酸二(十八醇)酯、二丁基羟基甲苯、丁基羟基茴香醚中的一种；所述紫外线屏蔽剂可以是纳米二氧化硅、纳米二氧化钛、纳米氮化硅中的一种； 
所述紫外线吸收剂可以是2-(2’-羟基-5’-甲基苯基)苯并***、2-羟基-4-正辛氧基二苯甲酮中的一种； 
所述淬灭剂可以是二硫代氨基甲酸镍盐、膦酸单脂镍型中的一种。 
所述自由基捕获剂可以是2-甲基-2-亚硝丁烷、苯基叔丁基氮氧化合物、2-乙酯基-2-甲基-1-吡咯啉-N-氧化物中的一种； 
一种抗老化PE管材制备方法：在PE树脂中加入抗氧化剂、紫外线屏蔽剂、紫外线吸收剂、淬灭剂和自由基捕获剂混合均匀，加温至210℃-240℃后经双螺杆挤出机挤出，冷却真空定型即可。 
PE聚合物光老化机理：PE聚合物的光老化是在紫外光和氧的参与下的自动氧化过程，该过程又被称为光氧化和光降解。其过程分为引发反应、链增长反应和链终止反应三个阶段，伴随着聚合物分子链的断裂和交联，导致其力学性能和外观的变化。生成的自由基再和聚合物发生链增长反应，使聚合物分子链断裂，生成新的自由基，自由基之间则发生链终止反应，使聚合物发生交联。 
紫外线屏蔽剂的作用是吸收或反射紫外光，使光不能直射到聚合物内部，从而抑制光老化，紫外线吸收剂的作用在于吸收紫外光，并将其能量转变成无害的热能放出，从而保护聚合物不受紫外光的引发；猝灭剂也称为减活剂， 其作用是能够从受激的聚合物分子(P-H·)上将能量消除，使聚合物从不稳定的激发状态回到稳定状态，不进一步分解为活性自由基；自由基捕获剂的作用则是将受激聚合物分解的活性自由基(P·、POO·、PO·、PCO·)捕获，成为稳定的化合物，从而阻止氧化反应的进一步发生。 
有益的技术效果：(1)添加剂相互间具有良好的协同作用，抗氧化性强，挥发性小，与PE树脂相溶性好；不影响材料力学性能，耐高温，热稳定性好。 
(2)对金属离子不敏感。 
(3)所选用添加剂不易燃，不易爆，无毒，使用安全无害。 
(4)几乎不吸收可见光，特别适用于无色透明和浅色制品。 
(5)对紫外光有强烈的吸收作用，碱性条件下不变黄，耐油。 
(6)挥发性低，加工过程中损失少。 
(7)对聚合物有最大的保护作用，并有助于减少色泽，同时延缓泛黄和阻滞物理性能损失。 
具体实施方式
下面结合具体实施方式对本发明的技术方案作进一步具体说明。 
实施例1 
一种抗老化PE管材，其特征在于由下列重量的原料组成 
所述抗氧化剂为1,3,5-三甲基-2,4,6-(3,5-二叔丁基-4-羟基苯甲基) 
苯； 
所述紫外线屏蔽剂为纳米二氧化硅； 
所述紫外线吸收剂为2-(2’-羟基-5’-甲基苯基)苯并***； 
所述淬灭剂为二硫代氨基甲酸镍盐； 
所述自由基捕获剂为2-甲基-2-亚硝丁烷。 
一种抗老化PE管材制备方法如下：在PE树脂中加入抗氧化剂、紫外线屏蔽剂、紫外线吸收剂、淬灭剂和自由基捕获剂混合均匀，加温至210℃后经双螺杆挤出机挤出，冷却真空定型即可。 
实施例2 
一种抗老化PE管材，其特征在于由下列重量的原料组成 
所述抗氧化剂为硫代二丙酸二(十八醇)酯、二丁基羟基甲苯、丁基羟基茴香醚中的一种； 
所述抗氧化剂为硫代二丙酸二(十八醇)酯； 
所述紫外线屏蔽剂为纳米二氧化钛； 
所述紫外线吸收剂为2-羟基-4-正辛氧基二苯甲酮； 
所述自由基捕获剂可以苯基叔丁基氮氧化合物； 
一种抗老化PE管材制备方法：在PE树脂中加入抗氧化剂、紫外线屏蔽剂、淬灭剂和自由基捕获剂混合均匀，加温至240℃后经双螺杆挤出机挤出，冷却真空定型即可。 
实施例3 
一种抗老化PE管材，其特征在于由下列重量的原料组成 
所述抗氧化剂为二丁基羟基甲苯； 
所述紫外线屏蔽剂为纳米氮化硅中的； 
所述紫外线吸收剂为2-羟基-4-正辛氧基二苯甲酮中； 
所述淬灭剂为膦酸单脂镍； 
所述自由基捕获剂为2-乙酯基-2-甲基-1-吡咯啉-N-氧化物； 
一种抗老化PE管材制备方法：在PE树脂中加入抗氧化剂、紫外线屏蔽剂、紫外线吸收剂、淬灭剂和自由基捕获剂混合均匀，加温至230℃后经双螺杆挤出机挤出，冷却真空定型即可。 
以上显示和描述了本发明的基本原理、主要特征和本发明的优点。本行业的技术人员应该了解，本发明不受上述实施例的限制，上述实施例和说明书中描述的只是说明本发明的原理，在不脱离本发明精神和范围的前提下，本发明还会有各种变化和改进，这些变化和改进都落入要求保护的本发明范围内。本发明要求保护范围由所附的权利要求书及其等效物界定。 

Claims (1)

1.一种抗老化PE管材，其特征在于由下列重量的原料组成
所述抗氧化剂可以是1,3,5-三甲基-2,4,6-(3,5-二叔丁基-4-羟基苯甲基)苯、硫代二丙酸二(十八醇)酯、二丁基羟基甲苯、丁基羟基茴香醚中的一种；所述紫外线屏蔽剂可以是纳米二氧化硅、纳米二氧化钛、纳米氮化硅中的一种；
所述紫外线吸收剂可以是2-(2’-羟基-5’-甲基苯基)苯并***、2-羟基-4-正辛氧基二苯甲酮中的一种；
所述淬灭剂可以是二硫代氨基甲酸镍盐、膦酸单脂镍型中的一种。
所述自由基捕获剂可以是2-甲基-2-亚硝丁烷、苯基叔丁基氮氧化合物、2-乙酯基-2-甲基-1-吡咯啉-N-氧化物中的一种；
一种抗老化PE管材制备方法：在PE树脂中加入抗氧化剂、紫外线屏蔽剂、紫外线吸收剂、淬灭剂和自由基捕获剂混合均匀，加温至210℃-240℃后经双螺杆挤出机挤出，冷却真空定型即可。
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