查询词典 polystyrene

To study the activation mode of LFA-1 on the NK cell surfuse, a platform based on optical tweezers was constructed to observe the molecular behavior of LFA-1. According to the results, the adhesion force between an NK cell and a polystyrene microsphere coated with anti-LFA-1 antibody was confirmed to be time-dependent.

我们利用光镊研究了NK细胞表面LAF-1的单分子行为，发现NK细胞与包被了LFA-1抗体的小球之间的结合力随二者接触时间的延长而增强，表明NK细胞表面LFA-1分子可能会受LFA-1抗体影响而发生局部聚集。

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。

In this paper, polystyrene-b-poly(styrene-co-acrylonitrile) diblock copolymer was prepared by atom transfer radical polymerization.,with CuBr/N,N,N,N",N"-pentamethyl diethene triamine as the catalyst system.

本文以CuBr／nN，N，N，N&，N&-五甲基二亚乙基三胺为催化体系，研究了原子转移自由基聚合法PSt-b-P两嵌段聚合物的合成。

High impact polystyrene ; organic-montmorillonite ; composites ; polyammonium tribasic phosphate ; flame retardancy

高抗冲聚苯乙烯；有机蒙脱土；复合材料；聚磷酸铵；阻燃性能

Small height fluctuations were artificially introduced to the thin film samples by mechanically rubbing the sample surface with a rayon cloth before dewetting initiates. By comparing the dewetting morphology evolution and the characteristic length of dewetting structures of unrubbed and rubbed samples, the results clearly show that the dewetting mechanism for thinner polystyrene films with h≤13. 3nm is spinodal dewetting and that for thicker films with h≥13. 3nm is heterogeneous nucleation dewetting.

通过用绒布在薄膜表面进行摩擦，人为的引入一定程度的厚度涨落，通过比较有和没有表面涨落的薄膜的去湿形貌，可以清楚的识别出厚度小于13.3nm的聚苯乙烯薄膜的破坏机理为旋节去湿，而厚度大于13.3nm的聚苯乙烯薄膜的破坏机理则为成核去湿，形成双连续结构或孔洞都可以导致薄膜的旋节去湿。

A series of polymers containing 1,8-naphthalimide moieties in the side chains have been prepared via RAFT technique. Firstly, five styrene and two methyl acrylate based 1,8-naphthalimide monomers were synthesized and characterized. Then, carbazyl group terminated polystyrene was used as macromolecular RAFT agent.

我们合成了5种苯乙烯类和2种甲基丙烯酸酯类萘酰亚胺单体，以一种含末端带咔唑结构的聚苯乙烯为大分子RAFT试剂，考察了所得单体的RAFT聚合，发现苯乙烯类1，8-萘酰亚胺单体可以聚合，但是聚合度不高，甲基丙烯酸酯类1，8-萘酰亚胺单体RAFT聚合不可控。

The second exotherm could be ascribed to the relatively compactconformation of individual polystyrene chains; upon heating during DSC scan, phenylring could stack to form some kind of ordered regions inside micro-PS.

而广角X射线衍射以及in situ FTIR等研究证明第二个放热峰则归因于micro-PS特殊的链构象：DSC升温过程中链的疏松构象易于通过苯环的堆积形成局部链段有序化，从而放出热量(大约6.4 J／g)。

Effect of polymerization conditions including charging weight ratio of polystyrene macromer, amount of initiator and temperature of copolymerization on grafting efficiency were studied. PBA-g-PS was used as compatibilizer in the blends of PS/ACR Effects of composition of the blends, amount of the graft copolymer, and composition of the graft copolymer on mechanical properties were studied.

研究了共聚合反应条件：聚苯乙烯大单体的投料质量分数，引发剂用量，反应温度对接枝效率的影响；PBA-g-PS可以作为ACR/PS体系的共混增容剂，研究共混物的组成，接枝物的用量，接枝物的组成对共混物物理机械性能的影响。

When the brominated polystyrene content was 3%,the horizontal burning velocity of the composite was 33 mm/min,which measured up to FR standard of our country,and the comprehensive properties of the composite were satisfactory.

当在共混物中添加质量分数为3%的BPS阻燃剂时，复合材料的水平燃烧速率为33 mm/min，满足了我国关于家用电器的阻燃法规(＜40 mm/min)，而且此时体系的综合性能也较好。

Pictures of the Phoenix after its return horrified me more than I cared to admit--bombs landed on the main hull and the wing pods, and each released the chemicals that munched through the metal the way a flame crinkles polystyrene.

在它的回返后的凤凰城的照片惊悸的我超过我愿意承认--在主要的壳和翅膀荚上被登陆的炸弹，而且每个发表了用力咀嚼过金属火焰使绉聚苯乙烯的方式化学药品。

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。