查询词典 poss

Similar lamellar hybrids can be obtained from octa(y-chloroammoniumpropyl) polyhedral oligomeric silsesquioxanes dodecyl benzene sulfonic acid sodium salt C_(18H_(29)NaO_3S, DBSS. Further research shows that different POSS to surfactant ratios result in different arrangement of layers: when there exists excessive POSS, the layer is arranged in a "Alkyl-POSS-POSS-Alkyl" sequence; while on the contrary, the layer is in "Alkyl-POSS" sequence.

实验研究表明，通过调整POSS和表面活性剂的物质的量比例可以改变片层结构，发现当POSS成分大大过量的时候，片层重复单元按照&烷基-POSS-POSS-烷基&顺序排列，对应较大的层间距；当表面活性剂成分大大过量的时候，片层重复单元按照&烷基-POSS&顺序排列，对应较小的层间距。

Improvement of combustion properties of the POSS/polymer composites mainly depends on barrier effect generated from silicon-oxygen cages of POSS, elements or groups of effective flame retardance in organic substituents of POSS, and dispersion of POSS in polymer matrix.

进一步的研究分析表明，POSS提高聚合物材料的阻燃性能主要取决于POSS本身核心笼型硅氧结构在材料燃烧中的阻隔作用、POSS有机取代基所包含的高效阻燃元素或基团、POSS在聚合物基体中的分散状况等因素。

The POSS-based hybrids were characterized by FTIR,~1H-NMR,~(29)Si-NMR and UV. The POSS content in the hybrids were determined using three kinds of different methods and could be effectively controlled by varying the POSS feed ratio.4. It was estimated that about 5~8 vinyl groups in POSS participated in the copolymerization reactions by the ~1H-NMR spectra.

分别采用FTIR、~1H-NMR、~(29)Si-NMR和UV等方法对五个系列POSS基高分子材料进行了表征，证实POSS已与共聚单体发生了聚合反应；并通过红外标准曲线和紫外标准曲线以及核磁积分面积对共聚物中POSS的含量进行了计算，发现可以通过投料比来控制共聚物的组成。

Series of crosslinked polymers containing POSS were synthesized in this thesis. The main contents include three parts as follows:(1) The preparation of different POSS molecules containing multiple functionalgroups and the development of crosslinked polymers containing POSS were reviewed in detail.

2合成了一种多功能团的POSS分子(T_8H_8)及四种不同长度的双烯功能团有机小分子，这些有机小分子可以通过硅氢化反应与POSS形成交联聚合物，在聚合物中作为连接链将POSS分子连接起来。

The structure of POSS is attributed by Fourier transform infrared spectroscopy, Nuclear magnetic resonance and Mass spectrography. Through measurements, inorganic cage-structure and hydroxy group in the structure of POSS are affirmed.

通过红外光谱、质谱和核磁共振表征了合成的POSS，表明产物具有笼型结构并且具有羟基。

In this paper, the synthesis methods of POSS are introduced, and the applications of POSS-based hybrid materials in the fields such as photoelectric materials , flame retardance of polymer an.

介绍了POSS合成的研究进展，重点综述了近几年POSS杂化材料在光电材料、聚合物阻燃和材料表面改性等领域的应用。

The structure and property as well as synthesis of POSS monomers and their derivatives were described in this review. The potential applications of POSS-polymers were also introduced.

文中介绍了多面体低聚倍半硅氧烷单体的结构、性能、单体及其衍生物的合成，以及其改性聚合物材料在航空、航天、卫生、电子等高科技领城内的应用前景。

The Limit Oxygen Index also can be raised from 16.5 to 22 and 23 respectively.The Octaphenyl POSS is synthesized via the hydrolysis and condensation of phenyltrichlorosilane (PhSiCl_3) and the subsequent rearrangement reaction catalyzed by tetramethylammonium hydroxide. Poly are easily synthesized from Ph-POSS via bromination with Br_2/Fe system.

以苯基三氯硅烷为起始原料，通过水解缩合、催化重排的办法制备了八聚苯基笼型倍半硅氧烷，在Fe粉催化条件下将溴元素引入Ph-POSS的苯环得到Br-POSS；使用该种Br-POSS和Sb_2O_3的混合物(3∶1，质量比)作为聚苯乙烯树脂的添加剂，采用熔融共混法制备(Br-POSS+Sb_2O_3)／PS复合材料。

Both surfactants can intercalate into the layers of the pristine clay dispersed in water prior to polymerization. Although the d spacing of the POSS-intercalated clay is relatively smaller than that of the CPC-intercalated clay, PS more easily intercalates and exfoliates the POSS-treated clay than the CPC-treated clay.

插层剂预先插层到分散於水中的黏土后再进行乳化聚合反应，虽然POSS插层后黏土的层间距离较CPC插层后的层间距离小，但聚苯乙烯与POSS互容性较佳，所以易使黏土达到脱层结构，而CPC则反之。

Then the surface of the star polymer was intramolecularly crosslinked using octa(3-azidopropyl)polyhedral oligomeric silsesquioxane, POSS-(N_3)_8,as the inorganic multifunctional crosslinker at high dilution concentration via click chemistry,forming a novel POSS/polymer hybrid nanostructure.Thermogravimetric analysis shows that after surface crosslinking, the thermostability of the core crosslinked PS can be remarkably improved.In the second work,we synthesized of a novel polymer with quatrefoil-shaped topology.

接着，我们合成了一种结构规整的含八个叠氮功能团的无机分子—多面低聚倍半硅氧烷，以其为交联剂，我们通过Click反应在即稀浓度下实现了前驱体星型聚合物的分子内表面交联，得到了外层为无机分子交联，内层为有机高分子的星状高分子，这种新型的星状聚合物表现出了优良的热稳定性能。

There had been a moment during the breakfast meeting, though, after the backslapping and the small talk and when all of us were seated, with Vice President Cheney eating his eggs Benedict impassively and Karl Rove at the far end of the table discreetly checking his BlackBerry, that I witnessed a different side of the man.

那次早餐会期间，在表示过关心和寒暄以后，我们所有人坐了下来，我注意观察了一下，副总统切尼面无表情地吃着班尼迪克蛋（Eggs benedict，源自美国，以英式松饼、火腿、水煮蛋以及荷兰酱组合而成），卡尔。罗夫在餐桌的远端谨慎地经常查看他的黑莓手机，我目睹了他所不为人知的一面。

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