苯乙烯

A novel macromonomer,polystyrene capped with thienyl group,which can undergos oxidation coupling polymerization,has been synthesized by anionic polymerization of styrene with butyl lithium as the initiator and 3-bromo-thiophene as the terminator.

以丁基锂为引发剂、四氢呋喃为溶剂，在氮气气氛和-78℃下进行苯乙烯阴离子聚合，并加入 3-溴噻吩作为终止剂，从而合成出末端含噻吩基的聚苯乙烯，它可以进行氧化偶联聚合，是一类新的大分子单体。

It was shown that the purity of the aim product was higher than 99% and its yield was 60%~70%. The intermediate product p-tertbutoxycarbonyloxybenzaldehyde could be synthesized conveniently and quantitatively. The main byproduct was triphenylphosphine oxide.

结果表明，所得目标产物对特丁氧酰氧基苯乙烯纯度达99%以上，产率为60%~70%，中间产物对特丁氧酰氧基苯甲醛可以定量合成，反应的副产物主要是三苯基氧化膦。

Firstly, the homopolymerization of acrylamide was carried out in aqueous phase by reversible addition-fragmentation chain transfer radical polymerization using a trithiocarbonate as a chain transfer agent.

整个过程分为两步，首先在水溶液中，通过RAFT控制得到亲水性单体丙烯酰胺的均聚物；然后以得到的均聚物作为水溶性的大分子链转移剂，在水相中条件下参与亲油性单体苯乙烯无皂乳液聚合。

Dithioester and trithiocarbonate RAFT reagents were synthesizedby different methods, and were used for the polymerization of styrene ormethacrylates, by thermal, thermo-initiator and photo-initiation.

针对这一问题，本文尝试用三种方法合成了结构不同的RAFT试剂，考察了热引发、引发剂引发以及紫外光引发条件下，二硫酯／三硫酯调控的常见单体苯乙烯以及丙烯酸酯的RAFT聚合。

Reversible Addition-Fragmentation Transfer polymerization; Living Free Radical Polymerization; Photoinitiate polymerization; Trithiocarbonate

工程科技I，化学，高分子化学可逆加成-断裂链转移自由基聚合；活性聚合；紫外光聚合；苯乙烯St

Concentrated emulsion polymerization of styrene in the presence of two polymerizable surfactants, sodium undecylenic acid and newly synthesized CS-1 was carried out.

在苯乙烯的浓乳液聚合体系中，考察了两种可聚合的表面活性剂十一烯酸钠和新近合成的阴离子型羧酸盐类的表面活性剂CS-1的聚合行为。

Monodisperse carboxylated superparamagnetic polymer composite microspheres with high magnetite content were prepared by miniemulsion copolymerzation,in which acrylic acid and styrene were used as polymeric monomers,and Fe3O4 microparticles were costabilized by undecylenic acid /oleic acid.

在表面由十一烯酸和油酸共同修饰的Fe3O4磁流体存在下，以苯乙烯和丙烯酸为共聚单体，用细乳液聚合法，制备了单分散，高Fe3O4含量，且表面带有羧基的超顺磁性高分子复合微球。

One practical package of technological formula and parameter about electroplating tinting for ABS plastic are provided, including stress riddance, unoil, coarsing, sensitization, activating, revive treatment, and five-colored electroplating tinting .

介绍(丙烯腈/丁二烯/苯乙烯)共聚物制品的表面预处理、化学镀铜、电镀光亮铜和镀铜层着色等工艺，提供了一整套ABS 电镀着色的实用配方和工艺参数，包括去应力、除油、粗化、敏化、活化、还原处理及镀铜层五色系实用着色等。

A series of poly(p-phenylene vinylene) derivants are synthesized and characterized in chapter four.

第四章合成了四种不同的聚对苯乙烯撑衍生物，侧链的修饰提高了PPV的溶解性和成膜性。

Optimal reaction conditions were as follows: PAAS and SMA at weight ratio of 4:1, stirring for emulsifying at speed of 1500 rpm and last 60 min, acidifying for 90 min, and the curing temperature under 50℃for 90 min.

优化配方及工艺条件为：聚丙烯酸钠和苯乙烯-马来酸酐按4：1混合作乳化剂，1500rpm搅拌，分散乳化60min，酸化90min，50℃固化90min作为制备二甲戊乐灵微胶囊的优化工艺条件，在此条件下可以得到平均粒径为9.6μm、粒度分布均匀、包封率在99%以上的球形微胶囊。

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。