CN109233243A - 一种综合性能优异的导电mppo工程材料及其制备方法 - Google Patents
一种综合性能优异的导电mppo工程材料及其制备方法 Download PDFInfo
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Abstract
本发明提供了一种综合性能优异的导电MPPO工程材料,其特征在于,按质量百分比由以下组分组成:PPO树脂35~50%;HIPS树脂10~15%;自制导电纤维30~45%;增韧剂4~6%;偶联剂0.1~0.3%;抗氧剂0.2~0.4%;润滑剂0.4~0.8%;其力学性能优异,抗静电能力强,且炭黑添加量低于传统工艺,并且成本较低,具有很好的市场应用前景。本发明还提供了一种综合性能优异的导电MPPO工程材料的制备方法,操作简单,条件易控,成本低廉,对设备要求低,适于工业化生产。
Description
[技术领域]
本发明涉及工程塑料改性技术领域,尤其涉及一种综合性能优异的导电MPPO工程材料及其制备方法。
[背景技术]
PPO无毒、透明、相对密度小,具有优良的机械强度、耐应力松弛、抗蠕变性、耐热性、耐水性、耐水蒸汽性、尺寸稳定性。在很宽温度、频率范围内电性能好,主要缺点是熔融流动性差,加工成型困难,实际应用大部分为MPPO(PPO共混物或合金),如用HIPS改性PPO,可大大改善加工性能,改进耐应力开裂性和冲击性能,降低成本,只是耐热性和光泽略有降低。PPO/HIPS合金与大多数高分子材料一样都具有良好的电绝缘性,但在电子电器行业的一些特定工作环境中,要求PPO/HIPS合金制品在具有较高的耐热性高、尺寸稳定性、低翘曲性能的同时还要具有抗静电功能,即表面电阻为较低的水平,而且要求永久抗静电,以满足特定的使用要求。目前传统的做法是向基体树脂中添加炭黑、碳纤维、碳纳米管、石墨烯等导电填料,但是炭黑一般添加量为30%,且有掉尘现象、碳纤维添加量约15%,但价格高、制备出复合材料成本偏高,碳纳米管、石墨烯添加量低(2~5%),但价格偏高,且容易团聚,加工不方便。为了克服以上缺点,本发明提供了一种综合性能优异的导电MPPO工程材料及其制备方法,采用导电炭黑包覆剑麻纤维自制导电纤维,填充于PPO/HIPS树脂中,利用剑麻纤维在树脂中形成的导电通路,制备出的导电MPPO工程材料力学性能优异,且炭黑添加量低于传统工艺,并且成本较低,具有很好的市场应用前景。
[发明内容]
本发明是解决现有技术的不足,提供一种综合性能优异的导电MPPO工程材料,另一方面提供该材料的制备方法。
为了实现以上目的,本发明的技术方案如下:
一种综合性能优异的导电MPPO工程材料,按质量百分比由以下组分组成:
进一步地,PPO树脂在25℃氯仿中特性粘度0.4-0.5dL/g。
进一步地,HIPS树脂采用接枝法生产HIPS,熔融流动速率>10g/10min(250℃,5kg)。
进一步地,自制导电纤维为导电炭黑包覆剑麻纤维,其中导电炭黑为乙炔炭黑,粒径: 12~20nm,剑麻纤维为8mm短切纤维,其中导电炭黑与剑麻纤维比例为1:1。
进一步地,增韧剂为硅油或氟油充油的SBS、SEB-g-MAH、SEBS或SEBS-g-MAH中的一种或几种。
进一步地,抗氧剂由主抗氧剂四[β-(3,5-二叔丁基-4-羟基苯基)丙酸]季戊四醇酯和辅助抗氧剂亚磷酸三(2·4-二叔丁基苯基)酯混合而成。
进一步地,偶联剂为硅烷偶联剂或铝钛复合偶联剂。
进一步地,润滑剂为硬脂酸、硬脂酸锌、硬脂酸钙、聚硅氧烷、硅酮粉、硅酮母粒中的一种或几种。
一种综合性能优异的导电MPPO工程材料的制备方法,包括以下步骤:
(1)将剑麻纤维浸泡于10%NaOH溶液中24h,之后用清水反复洗涤出去残留的碱性溶液,并用乙酸溶液滴定至中性。再将剑麻纤维浸泡于清水中8h,使其充分吸水。最后将纤维置于蒸汽爆破机中,将纤维爆破为棉絮状,最后将棉絮状纤维置于除湿干燥箱中65℃条件下干燥 8h。
(2)将导电炭黑、剑麻纤维硅与烷偶联剂按50:50:2比例放置于高速混合机中,先后顺序为硅烷偶联剂于剑麻纤维先高速搅拌5分钟,待剑麻纤维表面完全润湿后加入再加入导电炭黑高速混合机中混合10分钟制备出自制导电纤维。
(3)将PPO树脂、HIPS树脂、增韧剂、抗氧剂和偶联剂在高速混合机中混合均匀,搅拌 3~5分钟;
(4)将步骤(3)混匀后的物料加入到双螺杆挤出机的料斗中,其中自制导电纤维从双螺杆挤出机侧喂,经高温挤出机熔融共混挤出、冷却、风干、造粒;
其中,双螺杆挤出机的温度设置为:一区:180~200℃;二区:280-320℃;三区:280-320℃;四区:280-320℃;五区:280-320℃;六区:240-260℃;七区:240-260℃;八区:240-260℃;机头温度:260~280℃;螺杆转速控制在200~350r/min,挤出后冷却、切粒、干燥。
本发明的有益效果为:
本发明采用导电炭黑包覆剑麻纤维自制导电纤维,填充于PPO/HIPS树脂中,利用剑麻纤维在树脂中形成的导电通路,制备出的导电MPPO工程材料力学性能优异,且炭黑添加量低于传统工艺,并且成本较低,具有很好的市场应用前景。
[具体实施方式]
下面结合具体实施例和对比例,对本发明的技术方案进行清楚、完整的描述。显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
本发明一种综合性能优异的导电MPPO工程材料,按质量百分含量由以下组分组成:
其中PPO树脂PPO树脂在25℃氯仿中特性粘度0.4-0.5dL/g,优选蓝星LXR040;
HIPS树脂采用接枝法生产HIPS,HIPS树脂采用接枝法生产HIPS,熔融流动速率>10g/10min(250℃,5kg)。优选牌号为韩国景湖HIPS HI-425TV;
自制导电纤维为导电炭黑包覆剑麻纤维,其中导电炭黑为乙炔炭黑,粒径:12~20nm,剑麻纤维为8mm短切纤维,两者按1:1比例配合使用;
增韧剂SEBS,牌号YH-503;
主抗氧化剂和辅助抗氧剂均为瑞士汽巴AT1010和AT168,按1:2比例添加;
偶联剂为硅烷偶联剂牌号:沸点KH550;
润滑剂为硅酮粉;
一种综合性能优异的导电MPPO工程材料制备方法,包括以下步骤:
(1)将剑麻纤维浸泡于10%NaOH溶液中24h,之后用清水反复洗涤出去残留的碱性溶液,并用乙酸溶液滴定至中性。再将剑麻纤维浸泡于清水中8h,使其充分吸水。最后将纤维置于蒸汽爆破机中,将纤维爆破为棉絮状,最后将棉絮状纤维置于除湿干燥箱中65℃条件下干燥 8h;
(2)将导电炭黑、剑麻纤维硅与烷偶联剂按50:50:2比例放置于高速混合机中,先后顺序为硅烷偶联剂于剑麻纤维先高速搅拌5分钟,待剑麻纤维表面完全润湿后加入再加入导电炭黑高速混合机中混合10分钟制备出自制导电纤维;
(3)将PPO树脂、HIPS树脂、增韧剂、抗氧剂和偶联剂在高速混合机中混合均匀,搅拌3~5分钟;
(4)将步骤三混匀后的物料加入到双螺杆挤出机的料斗中,其中自制导电纤维从双螺杆挤出机侧喂,经高温挤出机熔融共混挤出、冷却、风干、造粒;
其中,双螺杆挤出机的温度设置为:一区:180~200℃;二区:280-320℃;三区:280-320℃;四区:280-320℃;五区:280-320℃;六区:240-260℃;七区:240-260℃;八区:240-260℃;机头温度:260~280℃;螺杆转速控制在200~350r/min,挤出后冷却、切粒、干燥。
下面结合具体实施例、对比例对本发明作详细描述:
按照表一中的各实施例的原料配方方案按重量份数进行称量,将除自制导电纤维及导电炭黑外的树脂和助剂按比例依次加入高速混合机中,混合均匀,备用;将混匀之后的物料在双螺杆挤出机中进行挤出造粒,其中自制导电纤维及导电炭黑从双螺杆挤出机侧喂;将出造粒之后的粒子进行重新干燥之用注塑机制成标准测试样条测试。
表一:实施例和对比例份数
物料名称 | 实施例1 | 实施例2 | 实施例3 | 实施例4 | 对比例1 |
PPO树脂 | 48 | 43 | 43 | 38 | 45 |
HIPS树脂 | 15 | 15 | 10 | 10 | 15 |
自制导电纤维 | 30 | 35 | 40 | 45 | - |
导电炭黑 | - | - | - | - | 30 |
增韧剂 | 6 | 6 | 6 | 6 | 6 |
抗氧剂 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 |
偶联剂 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |
润滑剂 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
性能测试及评价:
将上述实施例1-4及对比例1制备的粒子物料先在鼓风烘箱中100~120℃的条件下干燥2小时,然后将干燥好的粒子物料用注射成型机制成标准测试样条测试,测试性能如表二所示。
表二:测试性能结果
由表二实施例1-4和对比例1可以看出,与添加导电炭黑的对比例1相比,添加自制导电纤维的实施例拉伸、弯曲和冲击强度更强,表面电阻率更大。本发明制备出的导电MPPO工程材料力学性能优异,抗静电能力强,且炭黑添加量低于传统工艺,并且成本较低,具有很好的市场应用前景。
以上所述仅为本发明的优选实施方式,本发明的保护范围并不仅限于上述实施方式,凡是属于本发明原理的技术方案均属于本发明的保护范围。对于本领域的技术人员而言,在不脱离本发明原理的前提下进行的若干改进,这些改进也应视为本发明的保护范围。
Claims (9)
1.一种综合性能优异的导电MPPO工程材料,其特征在于,按质量百分比由以下组分组成:
2.根据权利要求1所述的一种综合性能优异的导电MPPO工程材料,其特征在于,所述PPO树脂在25℃氯仿中特性粘度0.4-0.5dL/g。
3.根据权利要求1所述的一种综合性能优异的导电MPPO工程材料,其特征在于,所述HIPS树脂采用接枝法生产HIPS,熔融流动速率>10g/10min(250℃,5kg)。
4.根据权利要求1所述的一种综合性能优异的导电MPPO工程材料,其特征在于,所述自制导电纤维为导电炭黑包覆剑麻纤维,其中导电炭黑为乙炔炭黑,粒径:12~20nm,剑麻纤维为8mm短切纤维,其中导电炭黑与剑麻纤维比例为1:1。
5.根据权利要求1所述的一种综合性能优异的导电MPPO工程材料,其特征在于,所述增韧剂为硅油或氟油充油的SBS、SEB-g-MAH、SEBS或SEBS-g-MAH中的一种或几种。
6.根据权利要求1所述的一种综合性能优异的导电MPPO工程材料,其特征在于,所述抗氧剂由主抗氧剂四[β-(3,5-二叔丁基-4-羟基苯基)丙酸]季戊四醇酯和辅助抗氧剂亚磷酸三(2·4-二叔丁基苯基)酯混合而成。
7.根据权利要求1所述的一种综合性能优异的导电MPPO工程材料,其特征在于,所述偶联剂为硅烷偶联剂或铝钛复合偶联剂。
8.根据权利要求1所述的一种综合性能优异的导电MPPO工程材料,其特征在于,所述润滑剂为硬脂酸、硬脂酸锌、硬脂酸钙、聚硅氧烷、硅酮粉、硅酮母粒中的一种或几种。
9.一种权利要求1所述的综合性能优异的导电MPPO工程材料的制备方法,其特征在于,包括以下步骤:
(1)将剑麻纤维浸泡于10%NaOH溶液中24h,之后用清水反复洗涤出去残留的碱性溶液,并用乙酸溶液滴定至中性。再将剑麻纤维浸泡于清水中8h,使其充分吸水。最后将纤维置于蒸汽爆破机中,将纤维爆破为棉絮状,最后将棉絮状纤维置于除湿干燥箱中65℃条件下干燥8h。
(2)将导电炭黑、剑麻纤维硅与烷偶联剂按50:50:2比例放置于高速混合机中,先后顺序为硅烷偶联剂于剑麻纤维先高速搅拌5分钟,待剑麻纤维表面完全润湿后加入再加入导电炭黑高速混合机中混合10分钟制备出自制导电纤维。
(3)将PPO树脂、HIPS树脂、增韧剂、抗氧剂和偶联剂在高速混合机中混合均匀,搅拌3~5分钟;
(4)将步骤(3)混匀后的物料加入到双螺杆挤出机的料斗中,其中自制导电纤维从双螺杆挤出机侧喂,经高温挤出机熔融共混挤出、冷却、风干、造粒;
其中,双螺杆挤出机的温度设置为:一区:180~200℃;二区:280-320℃;三区:280-320℃;四区:280-320℃;五区:280-320℃;六区:240-260℃;七区:240-260℃;八区:240-260℃;机头温度:260~280℃;螺杆转速控制在200~350r/min,挤出后冷却、切粒、干燥。
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