聚乙烯

The kinetics of thermal oxidation of rosin and abietic acid absorbed on the polyethylene film were respectively studied. The kinetic equation of heat oxidation was determined by UV spectrophotometry.

设计了松香和枞酸在聚乙烯膜上的氧化反应器，建立了枞酸在聚乙烯膜上的紫外分光光度分析方法，跟踪测定了松香和枞酸氧化反应的过程。

This mechanism is different from that for the acetalization reaction of polyvinyl alcohol with saturated aldehydes,which has only 1,2-addition.Crosslinking in polyvinyl butenal was mainly resulted from the 1,4-addition.

此机理不同于只有1，2-加成方式的聚乙烯醇缩饱和醛化反应。1，4-加成主要导致聚乙烯醇缩丁烯醛的交联。

A novel β-cyclodextrin graft copolymer was synthesized by immobilizing β-CD onto the linear chain of PVA through acetalization reaction.

利用缩醛化反应将醛基化β环糊精固载到聚乙烯醇大分子链上，合成出了聚乙烯醇固载β环糊精的线性环糊精高分子，其最佳反应条件是反应时间 2h ，温度 70℃，β CD 6 CHO与PVA的质量比小于等于 4∶1。

METHODS: Mono-6-O-tosyl-β-CD and mono-6-formyl-β-CD were synthesized separately. Silylatedβ-CD was loaded onto polymer chain of PVA by acetalization to produce PVA containingβ-CD linear high polymer.

分别合成单6-对甲基苯磺酰β-环糊精酯和单6-甲酰基β-环糊精，利用缩醛化反应将醛基化β-环糊精固载到聚乙烯醇大分子链上，合成出聚乙烯醇固载β-环糊精的线性环糊精高分子。

The result shows at the mild condition chain olefin that nCl7, polyethylene can be cracked into solutions of ethane, propane, butane, benzene and toluene and other small molecular compounds, polyethylene reacted fluids are mainly composed of a-olefin at the range 12 to 38, by which α-ωdiene, saturated hydrocarbon and aromatic hydrocarbon, anthracene, phenanthrene of albocarbon series are contained.

结果表明，在温和条件下可以将链状烷烃如正十七烷烃、聚乙烯通过微波及炭催化剂的作用，裂解成乙烯、丙烷、丁烷、苯、甲苯等溶剂及小分子化合物。聚乙烯反应液体产物以碳数在12~38范围的α-烯烃为主，也产生α-ω二烯、饱和烃及芳烃，芳烃主要有萘系列、葱、菲等。

The ZTX 99 HSHM-PE fiber is one of three major hi-tech fibers (specifically the carbon fiber, the armied fiber and the HSHM-PE fiber) and the toughest of all and its basic features are as follows

ZTX 99高强高模聚乙烯纤维是当今世界三大高性能纤维(碳纤维、芳纶和高强高模聚乙烯纤维)之一，也是目前世界上强度最高的纤维，其基本特性为

The calculation result of molecular dynamics simulation was received using the minimization in molecular mechanics method, which indicates that the optimized configuration is one-to-one hydrogen bonds of the double chains of atactic PVA .

通过分子动态模拟，对所使用的两个具有无规结构的聚乙烯醇链进行能量优化，结果表明，当两个聚乙烯醇分子中的羟基形成了一对一的氢键时，能量最低，体系最稳定。

Advance in study on inhibiting lipid oxidation of natural antioxidants;2. Effect of different types of packaging on lipid oxidation of walnut (Carya cathayensis Sarg.) during storage

为了选择合适的包装措施以减缓山核桃仁中油脂在贮藏期间的氧化酸败，延长其贮藏期，研究了用聚乙烯塑料膜(Polyethylene，PE)和聚乙烯塑料铝箔膜(Polyethylene/Al，PE/Al)的普通包装与PE、PE/Al的真空包装，4种不同包装措施对山核桃贮藏过程中油脂氧化的影响。

The tablets is made from PVPk30, PVPP, MCC, corrigent and other excipients

本制剂处方中采用了聚乙烯吡咯烷酮（PVPk30）、交联聚乙烯吡咯烷酮、微晶纤维素和矫味剂，另加以部分其他辅料。

Required film is a hexene LLDPE and LDPE product that possesses good puncture and impact resistance.

需要的薄膜是具有好的抗挤压的己烷低密度聚乙烯及低密度聚乙烯产品。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。