硅烷交联聚乙烯电缆料的开发与应用

本文研究了硅烷对聚乙烯的交联技术，开发了硅烷交联聚乙烯电缆料。     

硅烷交联聚乙烯电缆料的开发与应用

本文研究了硅烷对聚乙烯的交联技术，开发了硅烷交联聚乙烯电缆料。     

硅烷固相载体一步法XLPE绝缘料的研制

该文采用红外光谱和热分析法研究了硅烷交联聚乙烯的分子结构 ,并研究了反应条件对凝胶率的影响 ,测得了硅烷固相载体一步法交联聚乙烯的各种性能     

10 kV聚乙烯电缆的硅烷交联工艺探讨

探讨了10 kV聚乙烯电缆的硅烷交联生产工艺,重点分析了硅烷交联新技术在电缆生产中的应用,并针对生产中存在的问题提出了解决方法。     

硅烷交联聚乙烯的电击穿

研究了由乙烯-乙烯基三甲氧基硅烷共聚物制成的硅烷交联聚乙烯在30℃～160℃温度范围内的电击穿。在30℃下施加冲击电压时,不论采用何种交联方法以及交联度如何,交联聚乙烯的击穿场强 F_B 除个别情况外总是低于未交联的低密度聚乙烯。讨论了由于交联过程产生微孔,造成在非晶体区域的非均匀性,因而使 F_B 值降低。根据随机分布弱点模型和单电子雪崩击穿理论的统计方法,进一步讨论硅烷交联聚乙烯在室温范围内的击穿机理;还比较在高于室温区域的直流电压 F_B 值与冲击电压 F_B 值,并讨论了空间电荷对 F_B 值的影响。     

硅烷交联聚乙烯绝缘电缆工艺

在一定的条件下,改变聚乙烯分子结构,使聚乙烯分子构成三维结构的分子,由四个分子联在一起,形成空间网状结构,从而解决聚乙烯容易开裂的问题。     

硅烷交联聚乙烯电缆绝缘料

简述了电线电缆用硅烷交联聚乙烯绝缘料的交联原理、分类、配方、工艺、设备,并介绍了硅烷自然交联聚乙烯绝缘料在应用和使用过程中的一些特征以及影响该材料交联状况的因素。     

低压电缆用可硅烷交联的低密度聚乙烯

交联聚乙烯能很好地适用于低压电缆制造。特别是本文中所叙述的可硅烷交联的低密度聚乙烯获得了相当大的市场。本材料中专门为Ｍｏｎｏｓｉｌ交联方法而开发。使用本材料制得的１ｋＶ电缆的试验结果是好的。这种新材料显示出明显的优点。     

电缆制造工艺对硅烷交联聚乙烯热延伸的影响

介绍了硅烷交联的工艺原理,分析了硅烷交联聚乙烯绝缘电缆在制造过程中影响其热延伸指标的因素,尤其是挤出温度和色母料配比对热延伸的影响。     

二步法硅烷交联电缆的投资价值分析

本文重点分析了硅烷交联的工艺、设备特点及技术经济性,从不同的角度分析了投资硅烷交联生产线的可行性。     

中压交联聚乙烯电力电缆不同交联方法投资价值的分析

生产中压交联聚乙烯电力电缆,可以采用过氧化物(DCP)交联、温水硅烷交联和免水煮硅烷交联等三种交联方法,本文对这三种交联方式的投资价值进行了比较分析,认为硅烷交联特别是免水煮硅烷交联,是企业生产中压交联电缆投资最少的交联方式。     

辐照交联阻燃聚烯烃电缆料的研究

本文叙述了辐照交联技术及其在电线电缆中的应用，探讨了聚乙烯、树脂基改性剂、复合阻燃剂及助交联剂等因素时电缆料性能的影响，以及辐照剂量与交联密度、力学性能、介电性能之间的关系。     

Study of space-charge characteristics in polyethylene for power cable insulation by laser-induced pressure-pulse technique

By utilizing the laser induced pressure-pulse (LIPP) technique, the behavior of space charge in low-density polyethylene (LDPE) and crosslinked polyethylene (XLPE) films in contact with metal or carbon-loaded semiconducting layers was studied quantitatively to clarify the space-charge characteristics in power cables. Negative heterospace charge near the anode and positive space charge in the bulk were observed in unoxidized LDPE under the fields above 120 kV/mm. The amount of negative space charge increased with applied field, while positive space charge in the bulk disappeared with increasing applied field. This indicates that electron injection and ionization are enhanced by applied field. Prominent negative homospace charge was formed near the cathode in oxidized LDPE, which indicates that oxidation enhanced electron injection. The depth of charge centroid from the cathode became larger with increasing temperature. This indicates that the effective electron mobility increases with temperature. Negative space charge also was formed in the bulk in XLPE films with metal electrodes, which indicates that crosslinking enhanced electron injection. XLPE films with a carbon-loaded semiconducting layer showed both negative and positive homospace charges near the semiconducting layers, which indicates that both electrons and holes were injected from the semiconducting layer.     

交联聚乙烯电力电缆水树检测方法的计算机仿真分析

为了给交联聚乙烯电缆水树老化状态的检测和与监测技术奠定基础,针对XLPE电缆水树在线检测常用的3种方法(直流分量法、损耗角正切法、谐波分量法)进行了计算机仿真模拟,比较了3种方法的优劣。建议采用测损耗角正切与测谐波分量相结合的方法,全面分析判断电缆水树老化状态。     

The effect of space charge on the initial growth of electrical trees in polyethylene

This paper describes the influence of space charge on the growth of an electrical tree which is an important factor of the dielectric breakdown in polyethylene-insulated power cables. Polyethylene and ethylene vinyl-acetate copolymer with a semi-conducting needle were used as the treeing specimens. The statistical analysis showed that the growth rate and the unbalance of positive and negative partial discharges increased as the vinyl-acetate content increased, and that the growth per cycle decreased with the increase in frequency. A model of the tree growth accompanied by the space charge behavior was proposed considering the above experimental results. The tree growth is considered to be caused by the dielectric breakdown due to the field enhancement at the tree tip during the positive half cycle of the applied voltage, the field enhancement being due to residual negative space charge injected during the previous negative half cycle. The negative space charge in polyethylene would be mainly supplied through the partial discharge inside the tree.     

辐照交联聚氯乙烯电缆绝缘料配方研究

使用聚氯乙烯树脂、增塑剂、敏化剂、稳定剂、抗氧剂、填充剂等添加剂,通过对电线电缆辐照交联聚氯乙烯绝缘料配方体系、工艺性能等方面进行试验研究,获得了性能优良的辐照交联聚氯乙烯绝缘料,可适用于辐照交联聚氯乙烯绝缘料的生产。     

硅烷偶联剂表面处理LiCrxMn2-xO4性能研究

对尖晶石LiCrxMn2-xO4材料表面进行硅烷偶联剂处理,以形成热稳定性好的硅化物表面层,来提高材料的电化学性能.用EPX、SEM和XRD等方法对处理前后的尖晶石LiCrxMn2-xO4正极材料进行了表征,结果表明:经硅烷偶联剂处理后的LiCrxMn2-xO4正极材料,在其表面形成了富硅层,在高温下(55℃)100次循环后的容量保持率为89.4%;而未处理的LiCrxMn2-xO4材料的容量保持率为71.5%.