聚氯乙烯

Acetanilide,hexane diacid and potassium hydrogen phthalate were used as additives to improve polyvinyl chloride crystallinity.

通过傅里叶转换红外光谱、差示扫描量热法及广角X射线衍射法研究了乙酰苯胺、己二酸和邻苯二甲酸氢钾与聚氯乙烯的相容性及对聚氯乙烯结晶度的影响。

But compared with the calcium carbide process PVC, ethylene law a number of middle-grade PVC grades with irreplaceable advantages.

但与电石法聚氯乙烯，乙烯法的一些中高档的不可替代的优势聚氯乙烯成绩。

One decalescence peaks appears in the DSC curve of PVC and the melting point is about 86.0℃. There are two decalescence peak of the composite of wheat straw-PVC, and its melting point is not clear.

聚氯乙烯树脂在DSC曲线中，出现一个吸热峰，熔点约为86.0℃；而麦秸与聚氯乙烯树脂复合后的人造板的吸热峰有两个，熔点明显不同。

Chemical Engineering Institute, Qingdao University, Qingdao 266071, ChinaAbstract: The compatibility and process property of PVC/HDPE blends were studied on the basis of using vinyl chloride/ethyl acrylate copolymer as a compatibilizer, thus polyvinylchloride/(vinyl chloride/ethyl acrylate)/, ie.

以氯乙烯-丙烯酸乙酯共聚物作为聚氯乙烯和高密度聚乙烯的增容剂，研究了共混物的相容性和加工性能，在此基础上研制了聚氯乙烯/氯乙烯-丙烯酸乙酯共聚物/高密度聚乙烯合金，进而研究了合金的力学性能。

It is based on the combination of PVC resin and coal tar, in which proportional plasticizers, Stabilizators and filling materals is added, to plasticize heat construction water—proof material at the degree between 130℃ to 140℃.

聚氯乙烯胶泥是以聚氯乙烯树脂和煤焦油为基料，按一定比例加入增塑剂、稳定剂及填充料在130～140℃温度下塑化而成的热施工防水材料。

It is identified that PVC expanded pipe with screw-thread inwall can lower the noise for 5 to 7 Db than PVC expanded pipe, and 10 -15 Db than solid wall PVC pipe, and it is the most idea drain pipe fro building up to now.

据鉴定，扩大聚氯乙烯管螺纹内壁可降低噪声5至7分贝，比聚氯乙烯扩管 10-15分贝，比固墙PVC管、而且也是最排水管穿梭建设构想到现在。

Horniness PVC plastic windows and doors are with eminent anti-corrosion character,none-rust,none-rot,with good bear-cold character and bear-hot character,with beautiful and generous sculpt,bright and goregeous colorful,legerity structure,conveniently for installation,economically applicable,absorbing the wxcellenct of the same kinds products from abroad and domestic,advanced design,reasonable struvture,chosen materials scientifically,polished high quality,forming complete sets,reache the state standard of GB0

硬质聚氯乙烯管材，塑钢门窗具有优良的耐腐蚀性能，不锈、不烂、具有良好的耐寒性和耐热性，造型美观大方，色泽鲜艳，结构轻巧安装方便，经济实用。本公司生产的硬质聚氯乙烯管材，塑钢门窗，吸取国内外同类产品的优点，设计先进结构合理，选料科学，质量精良，配套齐全，已经达到国家GB8814-2004标准。

Hazardous Chemicals Industry: 200,000 tons / year polyethylene unit and chlorine oxidation Poly perchlorethylene devices, 80,000 tons / year PVC plant calcium carbide, 200,000 tons / year of sulfur-based sulfuric acid plant, 100,000 tons / year sulfuric acid plant following pyrite, 100,000 tons / year caustic soda , coal tar processing a single set of devices 100,000 tons / year the following new projects, etc., should be to stop the project examination and approval.

危险化学品行业：20万吨／年以下聚乙烯装置和氯氧化法聚氯乙烯装置、8万吨／年以下电石法聚氯乙烯装置、20万吨／年以下硫磺制酸装置、10万吨／年以下硫铁矿制酸装置、10万吨／年以下烧碱装置、煤焦油加工单套装置10万吨／年以下等新建项目，一律停止立项审批。

The status of supply and demand of vinyl chloride monomer and polyvinyl chloride resin at home and abroad was analyzed and the trends in future was predicted.

分析了国内外氯乙烯单体和聚氯乙烯树脂的供需状况，预测了未来几年的发展趋势，对我国聚氯乙烯工业的发展提出了建议。

In the three systems, system realizes the crosslinking of PVC bases on the peroxide crosslinking mechanism, the tensile strength of crosslinked PVC has been improved somewhat, the IR spectrum of gel demonstrates that there are characteristic absorption peaks of n-alcohol that belongs to ethanol amine and benzenoid group. From the analysis of gel structure , deduces that the mechanism of crosslinking reaction: under the initiations of peroxide and high temperature, PVC yields macromolecules free radicals, at the same time , styrene"s polymerization and grafting onto PVC takes place, at last the system forms crosslinking structure through coupling between radicals; confirms that triethanol amine can absorb HC1 produced by degradation of PVC, so improves the crosslinking efficiency of peroxide, decreases the HCl"s promotion for PVC"s degradation; deduces that triethanol amine can activate the PVC macromolecules and prolong the free radicals" life-time of PVC macromolecules; the effect to the PVC macromolecule makes styrenes graft reaction easy, and thus improves the crosslinking efficiency.

三种体系中三乙醇胺/过氧化二异丙苯/苯乙烯体系基于过氧化物交联机理实现了聚氯乙烯的交联，聚氯乙烯交联后拉伸强度有一定提高，凝胶红外光谱分析证实了凝胶结构中含有乙醇胺的伯醇基团特征吸收和苯环的特征吸收，由凝胶结构分析，推断出交联反应的机理：聚氯乙烯在过氧化物和热作用下产生大分子自由基，苯乙烯在过氧化物和大分子自由基的作用下发生聚合和接枝反应，最终通过自由基之间的偶合产生交联；证实三乙醇胺可以吸收聚氯乙烯分解产生的HCl，提高了过氧化物的交联效率，消弱了HCl对聚氯乙烯降解的促进作用；推断三乙醇胺可以活化聚氯乙烯大分子并有可能使聚氯乙烯大分子自由基存在的时间得以延长，对聚氯乙烯大分子的作用使苯乙烯的接枝反应易于发生，从而提高了交联效率。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。