70℃阻燃PVC电缆料的试生产

70℃阻燃PVC电缆料的试生产是采用常规PVC电缆料配方作基础,将增塑剂、阻燃增塑剂、填充剂、阻燃剂作为四因素,选用L_θ正交表进行四因素三水平配方设计,根据配方进行配料—捏合—混炼—出片—切料操作,返炼出片后在平板硫化机上压制试片测定性能,经二个循环调整得到最佳性能的配方。氧指数为33％,机械强度233.7kg/cm~2,击穿电压23.74千伏/毫米。     

软质PVC电缆料的辐射交联

以三甲氧基丙烷三甲基丙烯酸酯（ＴＭＰＴＭＡ） 为交联剂,以Ｃｏ６０γ射线为辐照源,研究了偏苯三酸三辛酯（ＴＯＴＭ） 增塑的ＰＶＣ电缆料的辐射交联。结果表明该辐射交联反应符合ＣｈａｒｌｅｓｂｙＰｉｎｎｅｒ 无规交联模型,ＴＭＰＴＭＡ１０ 分,辐照剂量４０ｋＧｙ 是较合适的配方与工艺条件,该材料经辐射交联后拉伸强度增加 ,断裂伸长率下降,１５５ ℃的热老化失重与１２０ ℃热变形率减小。     

PVC阻燃电缆料国内外技术新进展

文章阐述了国内外聚氯乙烯阻燃电缆料新技术的进展情况,并通过配方实例说明了对增塑剂和阻燃剂的选择,以及各种助剂对制品性能的影响,使其达到阻燃、消烟之作用。     

低烟阻燃PVC电缆料的研制

在７０℃ＰＶＣ电缆料的基础上，通过实验合理选择阻燃剂，阻燃增塑剂、填充剂、抑烟剂等组份，所得电缆料性能符合ＧＢ８８１５－８８，氧指数ＯＩ为３２，烟密度为２９５。     

单螺杆挤出机生产PVC电缆料

对用螺杆挤出机将物料经两次塑化造粒生产ＰＶＣ电缆料的工艺、配方进行了初步探讨,给出了用单螺杆挤出机生产ＰＶＣ电缆的工艺,并设计生产透明ＰＶＣ电缆料（Ｊ－７０）及黑色ＰＶＣ电缆料（Ｊ－７０）的配方,对试生产中的主要问题进行了简要分析。     

硬石膏在PVC电缆料中的应用

研究了超细硬石膏粉填充PVC电缆料的性能,与重钙、高岭土和滑石粉进行了对比,硬石膏具有明显优势。当硬石膏的用量为50份时,PVC电缆料的拉伸强度、断裂伸长率、体积电阻率和氧指数分别达到21.76MPa、222%、1.17×1013Ω·m和34%,满足国标GB/T8815-2002中J-70之要求。加工性能良好。     

EVA在PVC电缆料中应用的研究

本文对高 VA 含量 EVA 与 S-PVC 的共混以及 EVA 用量和不同增容剂用量与相容性的关系进行了研究。对电缆料的低温性、绝缘性、加工性和耐老化性的研究,确定了电缆配方中的适宜用量。     

阻燃绝缘级PVC电缆料的研制

105℃阻燃绝缘级PVC电缆料的研制吸取了70℃阻燃绝缘级电缆料的经验,合理选择增塑剂和阻燃剂,制得物理机械性能和阻燃性能满足105℃阻燃绝缘级标准的电缆料。试验结果表明,该阻燃电缆料的二次加工性能好,加工温度范围宽,易于操作,制得的电线符合生产厂家的技术要求。     

国内PVC电缆料研究近况

叙述了RoHS和REACH等环保规定对PVC电缆料提出的新要求及国内PVC电缆料的研究近况,指出了环保型PVC电缆料的研究方向。     

J-70型PVC电缆料的配方设计

开发了J-70型PVC电缆料的配方,重点对绝缘性能和阻燃性能进行了优化,产品性能满足GB/T8815—2008《电线电缆用软聚氯乙烯塑料》的要求,有毒有害物质含量也符合相关标准的要求。     

汽车用PVC/热塑性聚氨酯交联电缆料的研制

以汽车用电缆料为试验目标,研究了增塑剂、引发剂、助交联剂、热塑性聚氨酯(TPU)的用量对PVC/TPU体系硬度、力学性能、热延伸率的影响,并考察了其耐磨性能和耐老化性能。结果表明:①在助交联剂TAIC存在下,引发剂DCP可引发PVC/TPU体系的交联反应,并且随着DCP、TPU用量的增加,交联度增大。②PVC/TPU交联电缆料的优化配方为:PVC 100份,钙锌稳定剂8份,TO TM 50份,TAIC 3份,DCP 0.2份,TPU 30份,抗氧剂0.8份,其他助剂适量;采用该配方能生产出合格的汽车用电缆料。     

Catalytic conversion of waste plastics: focus on waste PVC

Effective waste management must address waste reduction, reuse, recovery/recycling and, as the least progressive option, waste treatment. The increase in plastic waste production is a serious environmental issue. Plastics consumption continues to grow and while plastic recycling has seen a significant increase since the early 1990s, consumption still far exceeds recycling. Waste plastic can, however, serve as a potential resource and, with the correct treatment, can be reused or serve as hydrocarbon raw material or as a fuel. PVC, highly versatile with many applications, is non‐biodegradable and has a high Cl content (56% of the total weight). Waste PVC incineration is highly energy demanding and can result in the formation of toxic chloro‐emissions with adverse ecological, environmental and public health impacts. The Cl component must be removed from any waste PVC derived gas or oil before it can be used. An overview of the existing waste plastic treatment technologies is provided with an analysis of the available literature on thermal and catalytic PVC degradation. Thermal degradation results in random scissioning of the polymer chains generating products with varying molecular weights and uncontrolled Cl content. There is a dearth of literature dealing with the catalytic dechlorination of PVC. A case study is presented to illustrate the role heterogeneous catalysis can play in PVC waste treatment. The efficacy of Pd/Al₂O₃ to promote PVC dechlorination is demonstrated, where a significant decrease (by up to a factor of 560) in the liquid fraction Cl content is recorded in addition to differences (relative to thermal degradation) in the gas phase product, i.e. higher C₁? C₄ content with preferential alkane formation. Copyright © 2007 Society of Chemical Industry     

电石法聚氯乙烯含汞废物处理与回收方法

阐述了电石法聚氯乙烯生产过程中汞污染类型及国内外含汞废物处理与回收的方法,分别介绍了气相、固相、液相含汞废物处理技术的研究现状与难点,并提出了汞污染整体防治工作思路及前景。     

有机钙液体稳定剂在PVC电缆料中的应用

对中国电缆料用热稳定剂的现状及经济的合理性、技术的可行性进行了分析,同时对KGF-R产品在PVC电缆料中的应用及所能达到的指标通过实验进行了研究,结果证明了KGF-R产品完全可以替代铅盐达到电缆料国家标准要求。     

浅谈PVC生产过程中三废的治理

叙述了电石渣的处理方法,电石渣上清液的使用,氯乙烯生产中低沸塔产生的尾气回收利用及成品离心机分离出的水的回收利用.     

我国PVC电缆料行业现状及对PVC树脂的需求

介绍了我国PVC电缆料行业的现状及线缆业对PVC电缆料的新需求。提出了PVC电缆料行业对分子质量分布均匀的PVC树脂、PVC消光树脂、本体法PVC树脂及高聚合度PVC树脂的需求。     

增塑剂对PVC电缆料电性能的影响

介绍了DBP、TPP、DOP、TOTM、TCP、DIDP及M－50等增塑剂在不同用量时对PVC电缆科电性能的影响：随着增剂用量的增加,PVC电缆料的电性能一般呈下降趋势。实验发现TOTM和TCP两种增剂的电性能较优,其最佳用量为35－40份。     

New aminated PVC compounds: Synthesis and characterization

Different compounds for the synthesis of poly(vinyl chloride) (PVC) with tertiary amino groups were tested, and the course of the modification reactions was followed under different conditions by nuclear magnetic resonance spectroscopy and elemental analysis. It is shown that PVC can be modified without side reactions with 2‐mercaptopyridine, 2‐mercaptopyrimidine, 4‐mercapto‐N,N‐dimethylaniline, and 4‐mercaptopyridine. The reactivity of the para‐substituted mercapto compounds is found to be considerably higher than that of the corresponding ortho products, and higher final degrees of modification are achieved. The availability of the amino group towards electrophilic attack in order to form quaternary ammonium salts was tested by reaction with methyl iodide. While this reaction takes place in good yields in the case of PVC modified with 4‐mercaptopyridine and 4‐mercapto‐N,N‐dimethylaniline, aminated PVC with the nitrogen atoms in ortho position do not react due to steric hindrance by the polymer chain. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 74: 1178–1185, 1999