乙烯的

Selection of our products well, pure texture, the choice of materials are: acrylonitrile-butadiene rubber, silicone, ethylene-propylene rubber, fluoride plastic, hydrogenated nitrile, poly - Fat, folder cloth, rubber, PU expected, polytetrafluoroethylene, nylon, POM, engineering plastics (such as high-strength performance PPS, PEEK) and graphite (such as ordinary graphite, high-purity graphite impregnated Graphite), ceramics, alloys, Pan-gen, synthetic materials.

我们的产品选材精良、质地纯正，选用的材料有：丁腈胶、硅胶、乙丙胶、氟胶、氢化丁腈、聚安脂、夹布、橡塑、PU料、聚四氟乙烯、尼龙、聚甲醛、工程塑料（如高强性能PPS、PEEK等）；及石墨（如普通石墨、高纯石墨、浸渍石墨）、陶瓷、合金、盘根、合成材料等。

As superplasticizer , a series of comb-shaped copolymers of polycarboxylic acid were synthesized by polyoxyethylene allyl methyl diether, maleic anhydride, and styrene with different initiators,and esterified with PEO-n.

以聚氧乙烯甲基烯丙基二醚、顺丁烯二酸酐、苯乙烯等为共聚单体，采用不同引发剂，合成了一系列聚羧酸型梳状共聚物超分散剂，并以PEO n单酯化得酯化产物，研究了共聚物的结构、组成、添加量等对水泥粒子分散性能的影响。

Effects from high-temperature and low-temperature direct chlorination on refining, energy saving and economics of ethylene chloride in chloroethylene production revamping are analyzed.

分析了高温、低温直接氯化技术对氯乙烯改造中二氯乙烷的精制、节能、技术经济等方面的影响。

By Al Kelly Carrell Columnists Vinyl siding is a very sturdy , long lasting material .

铝及凯利 Carrell |专栏乙烯基侧板是一个非常坚固的，持久的材料。

By Al Kelly Carrell Columnists Vinyl siding is a very sturdy , long lasting material .

铝及凯利 Carrell |专栏作家乙烯基侧板是一个非常坚固的，持久的材料。

Being different from the case of HZSM-5, the species on NaZSM-5 can not be further activated because they are decomposed to acetylene and desorbed with increasing temperature.

在NaZSM-5上，乙炔只通过与Na^＋位上的水作用形成乙烯醇，后者与沸石孔道中的阳离子以静电结合构成弱吸附物种。

Hydrogen gas discharge source was used to bombard target of non-crystalloid deuterate polyethylene polymethylmethacrylate,etc.The scattering spectrum was measured.

引出氢气放电产生的射线和粒子流打在非晶聚氘乙烯C2D4和有机玻璃C5H8O2等靶上，测得其散射谱上有多条尖锐的X谱线，其中除一条外都是原始谱中没有的。

Our results indicate that the dimerized model is the most stable configuration for both ethylene and acetylene when the converge is 0.5 ML, while the end-bridge configuration becomes the most favorable structure when the converge increases to 1.0 ML.

结果表明：无论是吸附乙炔还是乙烯分子，当覆盖度为0.5 ML时，最为稳定的吸附方式为dimerized模型；当覆盖度增大到1.0 ML时， end-bridge模型为最稳定的吸附方式。

The biodegradation , ecotoxic effects and environmental behaviors were introduced.

介绍了烷基酚聚氧乙烯醚的生物降解性、生态毒性效应及其环境行为等，并指出必须加大替代品的研究和开发力度。

In this paper, charge dynamic and improvement of charge storage stability in positively corona charged polytetrafluoroethylene film electrets have been studied.

研究了栅控恒压正电晕充电后的聚四氟乙烯薄膜驻极体的电荷输运特性，并对其电荷储存稳定性加以改善。

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。