苯乙烯

A new type of difunctional initiator (benzyl dibromide, ethyl dibromoacetate) was proposed in this paper and used to synthesize poly based triblock copolymers such as PSt-PBA-PSt, PMMA-PBA-PMMA.

本论文提出一种新型ATRP双官能团引发剂(如α，α-二溴化苄、α，α-二溴乙酸乙酯)，并用聚合反应速度法、GPC法、核磁分析法进行双官能度的验证，并通过两步聚合合成以聚丙烯酸酯为中间嵌段、苯乙烯或甲基丙烯酸甲酯为两端嵌段的ABA型三嵌段共聚物。

The result shows that both of the two C-C double bond are exist as a trans configuration. The dihedral angle between benzene ring was 24.6°and 37.5°respectively.

发现均二苯乙烯荧光团的两个双键都是以反式结构存在，并且分子中的苯环并非完全共平面，相邻苯环之间的夹角分别为24.6°和37.5°。

The results of dimerization of α-methylstyrene indicate that no products were detected at room temperature and it is benefieial to the reaction to raise temperature .

同时，α-甲基苯乙烯的二聚反应表明，室温下不发生反应，提高温度有利于反应进行。

Perhaps this is relevant to emodin and diphenyl ethylene glucoside which are the main ingredients included in the herb.

何首乌具有延年益寿，抗衰老作用，可能与其所含的主要成分大黄素、二苯乙烯苷有关。

Objective:To investigate the effects of Emodin and diphenyl ethylene glucoside on antioxidation of Radix Polygoni Multiflori at molecular lever.

目的：从分子水平研究何首乌中主要成分大黄素、二苯乙烯苷的抗氧化作用。

A copolymer emulsion used for air filter paper impregnation was studied, the emulsion was prepared by copolymerization of styrence/bulyl acryl ate and oxidized starch using sodium bisulphate/potassium per sulfate as initiator and sodium doddery sulfate as emulsifier.

摘 要：采用半连续乳液聚合的方法，以亚硫酸氢钠-过硫酸钾为引发剂，十二烷基硫酸钠为乳化剂，合成了一种以氧化淀粉、苯乙烯和丙烯酸丁酯为主要原料的空气滤清器滤纸浸渍乳液。

Strips tested:Printing ink to AS , PS , PET of It is relatively good to adhere to degree , PE and PP It is more difficult to adhere to, Need to increase its surface dyne to increase and adhere to degree.

三、剥离：油墨对苯乙烯、聚苯乙烯、聚酯的附著是较佳；对於聚乙烯、聚丙烯是较不易附著，需增加其表面达因数来增加附著度。

The material elastic modulus and yielding limit stresses at the temperatures of 25℃,30℃,40℃ and 50℃ are determined according to the results of tensile tests.

对苯乙烯基形状记忆聚合物进行了拉伸实验研究，测定了该材料在25℃、30℃、40℃和50℃时的弹性模量和屈服极限。

Small and uniform particles (5-15 um) of GDX 101 resins can be obtained by grinding with a colloid mill and elutriating with a home-made solvent elutriation device.

GDx 101是苯乙烯和二乙烯基苯的共聚物，具有强吸附性能，耐腐蚀，且无流失现象，已被广泛用作气相色谱固定相。

The emulsoid particle size and its distribution were determined by dynamic laser scattering and TEM. The composition changes of ACR were inspected by IR, and the core-shell structure was observed by TEM.

该共聚物是通过在适度交联的丙烯酸丁酯-丙烯酸2-乙基己酯共聚物乳胶粒外层包裹上一层甲基丙烯酸甲酯-苯乙烯共聚物而形成的。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。