查询词典 styrene

Solubility of liquid blowing agent in vinylidene chloride - acrylonitrile - styrene terpolymer was determined under the condition of directly immersing the VDC polymer sample into the blowing agent.

研究了液体发泡剂种类、共聚物组成、浸渍温度对发泡剂在偏氯乙烯-丙烯腈-苯乙烯共聚物中溶解度的影响。

The analytic methods are also studied : the concentration of styrene monomer is analyzed by gas chromatography , and the molecular weight of polystyrene is analyzed by viscosimetry .

建立了为评定阻聚剂性能配套的快速分析方法--近红外分析方法，即在单剂和工业剂评定中预测苯乙烯含量和聚苯乙烯分子量的四个近红外分析模型。

The tensile strength, tear strength and aging resistance of FVBR vulcanizate were similar to those of solution-polymerized butadiene-styrene rubber.

FVBR硫化胶的拉伸强度、衡裂强度以及耐热老化性能等与SSBR相当。

And TOF of catalytic oxidation for styrene to benzaldehyde has increased by 100%～240% because of the addition of alkalic ion, which matches with the crown ring.

系统考查了冠醚环及其直径大小、结构类型、键连方式、键连部位和与活性中心的距离对配合物催化氧化性能的影响。

Second, the polymerization behaviors of alkoxyl substituted Cp titanocene for styrene syndiotactic polymerization were investigated.

其次，本文研究了烷氧基取代的茂钛络合物对苯乙烯间规聚合的催化作用。

At the beginning of the treatment with BF〓·Et〓O, the BF〓 will coordinate with the alkoxyl group to form intermediates, and the intermediates will then convert to the fluorinated products that generate more active species for styrene polymerization under the selected conditions.

在〓加入的开始时，BF〓和甲氧基形成配位中间体，然后此中间体转化成BF3配位的氟化物。

This paper contains three parts: 1 Synthesis of novel titanium complexes; 2 Polymerization behaviors of alkoxyl substituted Cp Titanocenes as catalysts for styrene syndiotactic polymerization; 3 Polymerization behaviors of alkenyl substituted Cp Lanthanocenes as Methyl Methacrylate polymerization catalysts.

中文题名新型茂钛、噁唑啉钛络合物的合成、表征以及茂钛、茂稀土络合物催化性能的研究副题名外文题名 Synthesis，characterization of novel Cp，oxazoline titanium complexes and polymerization behaviors of titanocenes and lanthanocenes 论文作者张浩导师钱延龙黄吉玲学科专业应用化学研究领域\研究方向金属有机与均相催化学位级别博士学位授予单位华东理工大学学位授予日期2003 论文页码总数148页关键词金属有机化学稀土络合物噁唑啉类钛络合物茂钛络合物馆藏号BSLW /2003 /O627 /27 本论文包括三部分内容：1）有机金属钛络合物的合成；2）烷氧基取代茂钛络合物催化苯乙烯间规聚合的研究；3）烯基取代茂稀土络合物催化甲基丙烯酸甲酯聚合的研究。

Hrough copolymerization of styrene with few quantity of methacrylic acid, maleic anhydrate or 4-vinyl pyridine respectively and of butyl methacrylate with maleic anhydrate, the functional groups carboxyl, simple anhydride and pyridyl have been introduced respectively to the chain of PS or PBma.

通过苯乙烯与少量的甲基丙烯酸、马来酸酐或4—乙烯基吡啶的共聚及甲基丙烯酸正丁酯与马来酸酐的共聚，可在聚苯乙烯及聚甲基丙烯酸丁酯链上分别引入功能基因羧基、酸酐基和吡啶基对共聚物进行了红外光谱、酸碱滴定、元素分析、玻璃化转变温度、粘度及紫外光谱的测定。

The vulcanization of styrene-butadiene rubber was delayed by the EHL-g-PEW. The break elongation and tensile strength were respectively higher 0.45Mpa and 62.50% than that of EHL. And EHL-g-PEW is a good antiager.

EHL-g-PEW的加入，对丁苯橡胶具有延迟硫化的效果，扯断伸长率和拉伸强度比纯EHL改性的橡胶相比分别提高了0.45Mpa和62.50%，而且它具有良好的耐老化性能。

The multi monomer of methyl methacrylate/styrene melt grafting onto atactic polypropylene was studied.

对多单体甲基丙烯酸甲酯和苯乙烯熔融接枝无规聚丙烯进行了研究。

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。