乙烯型的

The corrugated paper honeycomb sandwich was fabricated with corrugated paperboard of different flute and base weight using polyvinyl acetate emulsion,and impact test was carried out to study their dynamic performance.

比较了瓦楞结构蜂窝夹层和普通蜂窝夹层用纸量的差别，用聚醋酸乙烯酯乳液作为黏合剂，使用不同楞型和定量的瓦楞纸板制得瓦楞结构蜂窝夹层，利用冲击实验机研究其动态性能。

Three series of donor-acceptorπ-conjugated molecules 1, 2, and 3 have been designed and synthesized with a N, N-dimethylamino, Julolidine group (2,3,6,7-tetrahydro-1H, 5H-pyrido[3, 2, 1-ij]quinolinyl), or N, N-diphenylamino group as the donor moiety, a phenylvinyl or thienylvinyl unit as the bridge, and a bromide or aldehyde group as the acceptor moiety.

本文设计并合成了1、2、3三个系列的D-π-A型化合物(Donor-Acceptorπ-conjugated compounds)，在化合物分子中引入久洛尼啶基团(2，3，6，7-tetrahydro-1H，5H-pyrido-[3，2，1-ij]quinolinyl)，N，N-二甲基氨基，或N，N-二苯基氨基为供电子基团，以苯乙烯基或噻吩乙烯基为桥链，以溴原子或醛基为吸电子基团。

In this article, star-high vinyl content polybutadiene was prepared using a multi-functional organolithium anionic initiator by " one-step " process. On the basis of 250ml glassware experiment ,we improved the experiment in 2L metal kettle. The polymerization condition was got as follows: polymerization temperature : 50-60 ℃, monomer content : 8-llg/100ml, polymerization time : 3~4 hours.Chracterizations were carried out by 'H-NMR, IR and GPC.

本文首次采用多官能团有机锂引发剂一步法合成出了星型高乙烯基聚丁二烯，在250ml玻璃瓶的基础上，进行2L金属斧的扩大实验，确定了以下聚合工艺参数：聚合反应温度：50～60℃，单体浓度：8～11g／100ml，聚合反应时间：3～4小时。

Objective: To investigate the feasibility of swelling hydrogel instead of polyethylene oxide as swelling polymer in push-layer of push-pull osmotically controlled-release tablets.

中文摘要：目的：考察常用亲水膨胀材料替代聚氧乙烯作为推动层的膨胀推动剂用于制备推拉型渗透泵控释片的可行性。

Polyvinylidene fluoride was used to prepare solvent base fluorocarbon coating, and the solvent constitution of PVDF coating was screened and optimized.

摘要用聚偏氟乙烯树脂制备了溶剂型氟破涂料，筛选并优化了PVDF涂料的溶剂组成。

The copolymerizations of vinyl sulphone dyes with acrylonitile were carried out in the media of water and DMF, and in an emulsion system.

对乙烯砜型染料在较高浓度下与丙烯腈在沉淀、溶液、乳液等不同体系中的共聚反应进行了研究。

Treatment of polystyrene-supported selenium ,bromide with lithium acetylides afforded polystyrene-supported selenoacetylene, which reacted with dicyclohexylborane giving a way for stereoselective synthesis of polymer-supported- vinylic selenides .

聚苯乙烯负载硒溴与炔基锂反应合成聚苯乙烯负载炔基硒醚，再与二环己基硼烷反应制得聚苯乙烯负载顺式烯基硒醚；此负载型烯基硒醚在NiCl2(PPh3)2存在下与格氏试剂发生偶联反应，提供了一种有效的-1，2-二取代乙烯的固相有机合成方法

Comb-shaped polycarboxylic -type superplasticizers were synthesized with acrylic acid,mathacrylic acid,sodium allylsulphonateand methoxypolymethacrylatethrough aqueous copolymerization initiated by ammonium persulfate.

将甲氧基聚氧乙烯醚单甲基丙烯酸酯、丙烯酸、甲基丙烯酸和烯丙基磺酸钠进行水溶液共聚，合成了具有梳型结构的聚羧酸系高效减水剂。

The main products: all types of pumps used, the kettle with mechanical seals, metal bellows mechanical seals, gaskets winding metal, metal-coated pads, metal compound pads, packing materials of the Pan-gen weaving, flexible graphite packing ring, Special type of rubber seal products, PTFE products and other products.

主要产品：各型泵用、釜用机械密封、金属波纹管机械密封、金属缠绕垫片、金属包覆垫片、金属复合垫片、各种材料的编织填料盘根、柔性石墨填料环、各类特种橡胶密封件制品、聚四氟乙烯制品等产品。

The swelling properties of epoxy vinyl ester resin/2-hydroxyethyl methacrylate copolymeric hydrogels were investigated.

该文研究了酚醛环氧型乙烯基酯树脂/甲基丙烯酸-β-羟乙酯共聚水凝胶的溶胀性质。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。