查询词典 poss

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 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。

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。

The results showed that difunctional POSS with clear structure could be prepared by this method with a high yield.A new,simple and feasible route to design and synthesize difunctional POSS was proposed.

结果表明通过此合成路线可得到高产率的结构清晰的双官能POSS，并提出了合成双官能POSS的新方案。

This article summarizes recent progress in hybrid electroluminescent materials and hybrid liquid crystals based on POSS,and self-assembly behavior of POSS derivatives.

本文综述了近几年来POSS基有机/无机杂化的电致发光材料、液晶材料和POSS衍生物的自组装行为的研究进展，指出这类材料由于制作方便和热力学性能优良，在未来高科技领域中必有宽广的应用前景。

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。

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。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

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如果有任何问题，你可以随时联系我。