查询词典 styrene

Two magnetic triphase catalysts of comb-like polyether s supported by γ-Fe2O3 were synthesized, and their catalytic behaviors in the iodo-substitution, etherization and the addition reaction of dichlo-rocarbene to styrene were also investigated.

以表面经偶联剂修饰的γ-Fe2O3为载体，通过聚分别与乙二醇单甲醚和一缩二乙二醇单甲醚的醇钠盐反应，合成了两种磁性梳状聚醚三相相转移催化剂，研究了它们在碘代、二氯卡宾对双键加成和混合醚制备反应中的催化活性。

Two triphase catalysts of comb-like polyether s supported by silicas were synthesized,and their catalytic behavior in the iodo-substitution,etherization and the addition reaction of dichlorocarbene to styrene were also studied.

以表面经偶联剂修饰的二氧化硅为载体，通过聚(β-氯乙基缩水甘油醚)和醇钠反应，合成了两种梳状聚醚三相转移催化剂，研究了它们在碘代、二氯卡宾对双键加成和混合醚制备反应中的催化活性。

Crown ether was introduced to copolymerize with the monomer of styrene owing to which can associate with silver ions. The silver ions were in-situ reduced to silver nanoparticles by UV light. Then silver nanoparticles were led on the surface of polystyrene latex particles. The vertical precipitation was employed to get the spheres self-assembled into close packed colloidal crystal with a face centered cubic structure identified.

利用冠醚可与银离子复合的特性，制备了聚苯乙烯－冠醚乳胶粒，采用原位还原的方法在乳胶粒表面引入银纳米颗粒，通过垂直沉降，乳胶粒子可自组装成紧密堆积具有面心立方的聚苯乙烯－银胶体晶体。

For investigations on the modified character of 1, 2 - polybutadiene (1,2 - PB), the structure changes of natural rubber/ 1,2 - PB blends under thermal oxygen process with chemical stress relaxation and Flory 's theory of crosslinking structure were studied and compared with those of NR/styrene-butadiene rubber and NR.

用化学应力弛豫法和Flory交联网络理论分析了在热氧作用下天然橡胶／1，2－聚丁二烯（NR／1，2－PB）共混物硫化胶的网络结构特征，并与NR／丁苯橡胶、NR硫化胶作了对比，以考察1，2－PB对NR／1，2－PB共混物老化性能的影响。

The hydrophobically associating interactions of the copolymer PASA with acrylamide, styrene derivative and sodium-2-acrylarnido-2-methylpropane sulphonate in aqueous solution were studied by flourescent probe.

通过荧光探针研究了丙烯酰胺-苯乙烯衍生物-2-甲基－2-丙烯酰胺基丙磺酸钠共聚物在溶液中的疏水缔合作用。

Glancing AT round hits were simulated by gouging the styrene in several locations on the glacis and turret with a blunt graphite pencil tip.

主要在前部和炮塔上，用一截烧热的石墨铅笔头在塑料上烧出，铅笔是绝佳的工具，因为它可以被削成合适的大小和形状，而且石墨不会被烧化。

The polymerization of styrene were catalyzed by the schiff base metal complexes / Grignard Reagent catalytic system.

用合成出的西佛碱金属配合物与助催化剂格氏试剂组成催化体系，系统研究了这种新型催化体系对苯乙烯的催化聚合反应的规律。

In this paper, the enzymatic hydrolysis lignin derivatives were synthesized. Halogenation of EHL was carried out in aqueous solution, and graft copolymerization of EHL was initiated by initiator. The chlorinated and graft copolymerized EHL were respectively applied to the chlorinated polyethylene rubber and styrene-butadiene rubber, and the properties of rubber were investigated.

本文采用水溶液法和引发剂引发法分别对酶解木质素进行了卤化和接枝共聚反应研究，合成酶解木质素的改性衍生物，将其分别应用于氯化聚乙烯橡胶和丁苯橡胶，并探讨橡胶各项性能的变化。

38Compounds were identified in Brookes, representing 59.66% of the total peak area; The main contents were Alcohol , Hexyl acetate , Styrene , 1-ethyl -3- methyl –Benzene , 1,2,3-Trimethyl benzene.

从布鲁克斯中检测出38种香气成分占总峰面积的59.66 %，相对百分含量较高的是乙醇、乙酸己酯、1-乙基－3－甲基苯、苯乙烯、1，2，3－三甲基苯。

Bromoethyl benzene was synthesized by anti-Markovnikov addition of hydrogen bromide to styrene under ultraviolet light irradiation.

在紫外线的照射下，苯乙烯与溴化氢气体发生反马氏规则自由基加成反应，可合成β-溴乙苯。

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。