单体

Butadiene was polymerized to some extent in the presence of binary catalyst system NdCl33iPrOHAlEt3 in toluene and the allylchloride was then added to the solution in order to cyclize the formed polybutadiene and cyclopolymerize the unreacted butadiene monomers.

采用NdCl3·3i－PrOH－AlEt3稀土催化剂进行丁二烯的顺式聚合，在聚合过程中引入烯丙基氯，进行分子内环化反应以及单体的环聚反应。考察了稀土催化剂用量、n／n（AlEt3）、环化时间、反应温度、单体浓度等对环化反应的影响，并对产物进行了红外光谱、核磁共振光谱的表

The method established can simultaneously separated fraxinellone, dictamine and obacunone from Dictamnus dasycarpus Turcz., with simple and rapid procedure, high purity and yield of the three compounds.

实验表明提取工艺及分离方法能同时制备3种单体，方法简单快速，单体的纯度和回收率高。

Two trifunctional monomers based on diethanolamine and methacryloyl chloride were synthesized and characterized by 1H-NMR, real-time infrared spectroscopy and dynamic mechanical thermal analysis.

以实时红外光谱法研究了两种单体的光聚合动力学性质，考察了不同单体、不同引发剂和引发剂浓度、不同光强对聚合性能的影响，并采用动态力学分析仪测试了光固化后材料的力学性能。

The copolycondesation type polyamic acid was synthesized by using pyromellitic dianhydride and 3,3',4,4'-benzophenonetetracarboxylic dianhydride as the dianhydride monomers, 4,4'-diamino diphenylmethane and 4,4'-oxydianiline as the diamine monomers under microwave irradiation in dimethylformamide.

在N，N'-二甲基甲酰胺溶剂中，以均苯四甲酸酐和3，3'，4，4'-二苯酮羧酸二酐为二酐单体，4，4'-二氨基二苯醚和4，4'-二氨基二苯甲烷为二胺单体，采用微波辐射低温溶液共缩聚，合成了聚酰胺酸预聚体，然后亚胺化脱水、环化，生成共缩聚聚酰亚胺。

The results show that the introducing of multivinyl monomer and CaCO3 can slow down polymerization rate to different extent.Using 1％～5％ trimethylolpropane trimetbacrylateor divinyl benzene,tight encapsulation of CaCO3 can be realized and beyond 94％PS cannot be extracted. The amount of crosslinker or emulsifier should be accommodated when the load amount of CaCO3 is increased.CaCO3 content in the product increases consequently with the increase of the loaded amount of CaCO3,which can be known from FT-IR and TGA.TEM observations reveal that when the load amount of CaCO3 is 14.8％,most CaCO3 particles are encapsulated and each latex particle contains one CaCO3 particle.Composite particles have well-defined core—shell structure and the thickness of polymer shells is around 10 nm.However,the thickness of polymer shell decreases and many free CaCO3 particles appear when the load amount of CaCO3 reaches 29.3％and 58.7％,respectively.

结果表明，多乙烯基单体以及碳酸钙的引入会使聚合反应速率有不同程度的降低；使用1%～5%的TMPTMA或DVB，可实现PS对碳酸钙颗粒的牢固包覆，不可抽提的PS达94%以上；当碳酸钙用量改变时，需要适当调整乳化剂和多乙烯基单体的用量；IR和TGA的结果表明，随着碳酸钙用量增加，产物中的碳酸钙含量也相应增加；TEM照片和计算结果显示，当碳酸钙用量为14.8%时，绝大部分碳酸钙颗粒被包覆，且基本上每个乳胶粒中包覆一个碳酸钙颗粒，复合粒子具有清晰的核壳结构，壳层厚度约为10 nm，而当碳酸钙用量增加到29.3%和58.7%时，壳层厚度减小，并且出现较多裸露的碳酸钙颗粒。

The water absorbed in the vulcanizates presents thermodynamic properties somewhat different from those of water in the bulk liquid, and exists in three states in the vulcanizates: free water, freezable bound water and non-freezable water.

硫化时，在过氧化物自由基的引发作用下，橡胶产生了共价交联、丙烯酸盐单体也发生了均聚，同时被部分接枝到橡胶分子链上，最终在硫化胶中生成交联橡胶、丙烯酸盐均聚物、丙烯酸盐和橡胶的接枝聚合物以及未聚合的丙烯酸盐单体。

Both star copolymer precursors are hydrolyzed in the acidic conditions, then the corresponding recovered star copolymers of EO and glycidol with multi pending hydroxylmethyls are esterified with 2-bromoisobutyryl bromide to produce the ATRP macroinitiators with multi pending bromoisobutyryl groups . Then the latters initiate the polymerization of styrene to form the corresponding amphiphilic three- and four-arm star PEO-g-PS.

在阴离子共聚EPEE单体和环氧乙烷单体的过程中，通过变换引发剂体系中的醇的结构(由原来的二元醇变成多元醇，如三羟甲基丙烷和季戊四醇)，合成了星形结构的共聚物，通过水解反应脱去保护基团后，再与2-溴异丁酰溴反应，得到链的侧端挂有很多2-溴异丁酸酯基的星形大分子引发剂，通过ATRP聚合机理引发苯乙烯聚合得到PEO为主链，PS为侧链的星形一接枝共聚物。

On the basis of the presented hydroelastic theory, a computer code HEAF (Hydroelastic Analysis Program for Fast Sea Transportations) is developed to calculate wave loads and dynamic responses of mono-or multi-hull high speed vessels in the frequency and time domain.

在理论研究的基础上，本文作者开发了计算机应用程序HEAF(Hydroelastic Analysis Programfor Fast Sea Transportations)，通过与结构干模态分析程序的数据接口，能够进行线性频域和非线性时域单体或多体高速船舶水弹性分析，可用以计算单体或多体高速船在各种海况下的波浪载荷、船体刚体运动和结构的弹性动力响应。

The formation of microemulsion system containing emulsifier,acrylamide,2-ethyltrimethyl ammonium chloride,sodium-2-acrylamido-2-methyl-propane-sulfonate and hexamethylene was studied.

对复配乳化剂(span+tw een)、丙烯酰胺、(2-甲基丙烯酰氧乙基)三甲基氯化铵、2-丙烯酰胺基-2-甲基丙磺酸钠和环己烷组成的微乳液体系进行了研究，研究了单体总质量浓度、AM摩尔含量和阴阳离子单体配比改变对形成微乳液需要的适宜H LB值和最小乳化剂用量的影响。

The invention also relates to a process for manufacturing the interpolymer product wherein the process employs two or more single site or metallocene catalyst systems in at least one reaction environment and wherein at least two of the catalyst systems have different monomer incorporation capabilities or reactivities and the same or, optionally, different monomer sequencing and/or tacticity characteristics.

本发明也涉及一种制备该共聚体产物的方法，其中该方法在至少一种反应环境中使用二种或多种的单一位置或二茂金属催化剂体系，且其中至少二种该催化剂体系具有不同单体结合的能力或反应性，和相同或可选不同的单体序列和/或立体规整度特性。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新