聚本乙烯

Poly is a kind of membrane material with excellent characteristics, in order to improve its surface hydrophilicity, so as to increase its antipollution ability, surface modification of PVDF hollow fiber porous membrane has been studied, on the bases of reviewing all kinds of modification methods, the modification method of chemical grafting onto hollow fiber membrane surface was determined.

聚偏氟乙烯是一类性能优良的膜材料，为了改善膜表面的亲水性，提高其抗污染性能，必须对膜表面进行改性，本课题在充分考察各类改性方法的基础上，采用在膜表面接枝共聚的方法对PVDF中空纤维膜表面进行改性。

In this study we use the oligomers of amino ethylene series as matrix and introduce dithiocarbamate group to adsorb merely heavy metal ions. Because of its special structural characteristics , dithiocarbamate can combine with a great number of heavy metal ions to produce insoluble complex compound except for alkali metals and alkaline earth metals.

本研究系将氨基乙烯系列之寡聚物(oligomers of amino ethylene series)当做基质引入只对重金属离子具有特殊螯合能力之荒酸盐，除了与碱金属及碱土族外荒酸盐与其他重金属离子都能形成不溶性错合物。

In this paper, the ionic liquid-polymer electrolytes based on 1-ethyl-3-methylimida-zolium tetrafluoroborate (EMIBF_4) and poly(vinylidene fluoride-co-hexafluoropropane) P(VDF-HFP were prepared on the basis of the existing results.

本论文采用室温离子液体，1-乙基-3-甲基咪唑四氟硼酸盐(EMIBF_4)与聚偏氟乙烯-六氟丙烯聚合物复合制备了新型离子液体/聚合物电解质。

In this thesis, the polymerization of triblock copolymer of styrene-butadiene-methyl methacrylate was carried out in glass flask ,with n-BuLi as initiator, 1,1-diphenylethylene as capping agent and Lithium 2(2-methoxyethoxy) ethoxide as additive.

本论文以n-BuLi为引发剂、1，1-二苯基乙烯为戴帽剂、2-(2-甲氧基乙氧基)乙氧基锂为添加剂，对玻璃聚合瓶中非极性-极性三嵌段共聚物聚苯乙烯—聚丁二烯—聚甲基丙烯酸甲酯的合成进行了研究。

The catalytic property of polyvinylidene chloride polyethylene polyamine palladium complex (PVDC-DETA-Pd,PVDC-TETA-Pd,PVDC-TEPA-Pd)for Suzuki reaction of sodium tetraphenylborate with iodobenzene were examined under microwave heating.

本论文研究了聚偏二氯乙烯多乙烯多胺负载钯催化剂和PVDC二苯胺钯催化剂的制备、表征及其在微波条件下对Suzuki反应的催化性能。1。

In addition, the invention further relates to a catalyzer combination used for polymerizing a conjugated dialkene monomer and the anions of an optional mono-vinyl aromatic hydrocarbon into a polydiene polymer having high and medium vinyl content. The catalyzer combination comprises an organolithium compound used as an anionic polymerization initiator, at least an alkali metal alkoxide compound expressed by the formula as a structure regulator.

此外，本发明还涉及一种用于将共轭二烯烃单体和任选的单乙烯基芳烃阴离子聚合成具有中高乙烯基含量的聚二烯聚合物的催化剂组合物，其包含作为阴离子聚合引发剂的有机锂化合物，和作为结构调节剂的至少一种式所示的碱金属醇盐化合物。

PVC resin is made by uniform polymerizing monomer of polyvinyl chloride through suspension.

本产品系以氯乙烯为单体，经悬浮法均聚而成的高分子化合物。

The invention adopts polyvinyl resin to substitute vinyl-polybutadiene, thereby decreasing the production cost, and increasing the mechanical property of high melt strength polypropylene resin get by only lead-in acrylics and the smooth finish of the product surface.

本发明采用聚乙烯树脂类代替乙烯基聚丁二烯。降低了生产成本，提高了单纯引入丙烯酸酯类所得的高熔体强度聚丙烯树脂的力学性能和制品表面的光洁度。

The Company perennial operating a variety of organic chemical raw materials, varieties include: methanol, ethanol, ethylene glycol, n-butyl alcohol, isobutyl alcohol, isopropyl alcohol, acetic acid, vinyl acetate, acetic acid acetate, acetic acid small lipid , styrene, toluene, phthalic anhydride, xylene, acetone, butanone, cyclohexanone, DMF, sulfuric acid, methyl isobutyl ketone, glycol ether, three toluene, octyl resin, melamine, etc. and so on.

本公司常年经营各种有机化工原料，品种有：甲醇、乙醇、乙二醇、正丁醇、异丁醇、异丙醇、冰醋酸、醋酸乙烯、醋酸乙脂、醋酸丁脂、苯乙烯、甲苯、苯酐、二甲苯、丙酮、丁酮、环己酮、DMF、硫酸、甲基异丁基酮、乙二醇丁醚、三甲苯、二辛脂、三聚氰胺，等等。

This year the company operating the various organic chemical raw materials, varieties are: methanol, ethanol, ethylene glycol, butanol, isobutanol, isopropanol, glacial acetic acid, vinyl acetate, B lipid, Ding acetic acid lipid, styrene, toluene, phthalic anhydride, xylene, acetone, butanone, cyclohexanone, DMF, sulphuric acid, methyl isobutyl ketone, glycol Dingmi, three toluene, 2 Xin fat, melamine.

本公司常年经营各种有机化工原料，品种有：甲醇、乙醇、乙二醇、正丁醇、异丁醇、异丙醇、冰醋酸、醋酸乙烯、醋酸乙脂、醋酸丁脂、苯乙烯、甲苯、苯酐、二甲苯、丙酮、丁酮、环己酮、DMF、硫酸、甲基异丁基酮、乙二醇丁醚、三甲苯、二辛脂、三聚氰胺。

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。