查询词典 styrene

The influence of acrylate containing fluorine monomer on surface property of styrene-acrylic copolymer has been studied.

研究含氟丙烯酸酯类单体对苯丙共聚物表面性能的影响。

The SAN copolymer generally contains 70 to 80% styrene and 20 to 30% acrylonitrile.

SAN共聚物一般都含有70至80 ％的苯乙烯和20至30 ％的丙烯腈。

In addition, the Heck reaction of bromobenzene with styrene of a wide range of substrates was also achieved.

在催化纯水中的Heck反应时，合适的表面活性剂也使得该类环钯化合物表现出一定的催化效果。

It was found that this polymeric arsine palladium(0) complex is a highly active and stereoselective catalyst for arylation of styrene or acrylic acid.

通过用水合肼对上述聚硅氧烷负载的单齿胂钯配合物进行还原制备了聚硅氧烷负载的单齿胂钯(0)配合物，研究表明它是苯乙烯、丙烯酸芳基化反应的高活性和高立体选择性的催化剂。

The catalytic performance for the Heck reactions of various substituted aryl halides with acrylic acid or styrene was studied.

研究了该催化剂对各种取代卤代苯与丙烯酸、苯乙烯的Heck芳基化反应催化性能。

The results showed that the main product was benzaldehyde and a little by-products were styrene oxide and phenylacetaldehyde.

发现该工艺中主要生成苯甲醛，少量副产物是环氧苯乙烷和苯乙醛等。

In this thesis, this system is used for epoxidation of propylene and styrenewith good results. The solvent effect is investigated for epoxidation of styrene. In the mixedsolvent of dimethyl phthalate / TBP or phenyl ether / TBP, the selectivity for styreneoxide is good but the conversion of styrene is low due to the coordination to thecatalyst of the solvent. When part of dimethyl phthalate or phenyl ether is replacedby toluene, the conversion increases and the selectivity keeps constant.

邻苯二甲酸二甲酯或二苯醚等与磷酸三丁酯的混合溶剂中环氧化的选择性较高，但由于溶剂对催化剂的配位作用抑制了催化剂的活性，苯乙烯转化率很低；当部分的邻苯二甲酸二甲酯或二苯醚被甲苯取代后，苯乙烯的转化率提高，生成环氧苯乙烷的选择性不变。

Styrene epoxidation was carried out using styrene as the row material, molecular oxygen as the oxidant, and modified vanadium phosphorus oxide as the catalyst.

以苯乙烯为原料，分子氧为氧化剂，改性的钒磷氧化物为催化剂合成环氧苯乙烷。

The maximum coupling efficiency of the star styrene-butadiene rubber was 85.93%, obtained when the molar ratio of tin tetrachloride and active chains was 0.2625, tin tetrachloride was added in two portions and with the terminal styrene moiety exchanged for butadiene.

结果表明，四氯化锡的用量和加入方式以及端基转换均对偶联效率有影响，四氯化锡与活性分子链的物质的量比为0.2625，且在转换端基的条件下分2次加入时，所得星型丁苯橡胶的偶联效率最高为85.93%。

A single-walled carbon nanotube filled styrene-acrylate latex conductive film was prepared using a polymer-latex-based technology. SWCNTs were dispersed in a gum Arabic water solution by means of sonication, and mixed with styrene-acrylate latex to form a conductive composite film after drying at room temperature.

基于聚合物乳液法，将单壁碳纳米管在阿拉伯树胶溶液中经过超声波振荡剥离后，与聚合物乳液直接混合，然后在室温下成膜，制备出了电渗流阈值为0.03%的SWCNTs-苯丙乳液复合导电薄膜，研究了SWCNTs在聚合物中形成导电网络的过程。

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。