查询词典 vinyl

The effects of above-mentionedconditions on alkylene reaction are studied to obtain the optimum reactive conditionsby orthogonal experiments having seven factors and three levels. GCLE is chosen as material to prepare 7-phenyl acetamideyl vinyl cephalkyl acidp-methoxy benyl eatsr in the experiment. The process is as follow: GCLE reacts withiodide in solvent, and produce 3-iodid, then reacts with PPh_3 to produce Witting agent,and reacts with HCHO to produce 7-phenyl acetamideyl vinyl cephalkyl acid p-methoxy benyl eatsr in alkaline conditions.

试验选用GCLE作为原料制备7-苯乙酰氨基-3-乙烯基头孢烷酸对甲氧苄酯，反应过程如下：GCLE与碘化物、PPh3在溶剂中反应生成3位膦盐，在碱性条件下生成Wittig试剂再与HCHO反应生成7-苯乙酰氨基-3-乙烯基头孢烷酸对甲氧苄酯。

It was also found that the decrease of immersion resistance and impedance of the commercial anti-corrosion of poly (vinyl chloride co-isobutyl vinyl ether) coating with increase of directly adding of nano-TiO2, which was elucidated with the theory of critical pigment volume concentration. At last, the optimal coating prescription was gotten as follows: 0.5-1.0g nano-TiO2 B, 25.6g resin, 33.4g xylene, 1.4g chlorinated paraffin, 1.5g 15% slurry of organic bentonite, 0.8g green chrome, 7.7g grey mica ferric oxide and 0.6g non-float aluminum.

直接添加纳米二氧化钛的商品化防腐涂层耐浸泡性能和交流阻抗值随添加量增加而降低，利用临界体积浓度理论等解释了该现象；通过实验获得了如下最佳涂料配方为：0.5-1.0g纳米TiO2，25.6g氯醚树脂，33.4g二甲苯，1.4g氯化石蜡52＃，1.5g 15%有机膨润土浆，0.8g氧化铬绿，7.7g云母氧化铁灰，0.6g非浮型铝粉。

The results showed that the tensile strength and elongation at break of the objective silicone rubber increased with the increase of vinyl content in PDM-MVS. The tensile strength was 3.9 MPa and elongation at break was 416%, and the reinforcement effect of PS on silicone rubber was significant when the mass fraction of vinyl was 1.50%. The objective silicone rubber had microphase-separated structure consisting of PS domains uniformly dispersed within a continuous PDM-MVS matrix. The compatibility between the two phases increased with the increase of vinyl content in PDM-MVS.

结果表明，目标硅橡胶的拉伸强度和扯断伸长率均随PDM-MVS中乙烯基质量分数的增加而增大，当乙烯基质量分数为1.50%时，其拉伸强度达3.9 MPa，扯断伸长率达416%，PS的增强效果明显；目标硅橡胶具有微相分离结构，PS作为分散相均匀分布于PDM-MVS连续相中，两相的相容性随着PDM-MVS中乙烯基质量分数的增加而增强。

Nifedipine was used as the model drug, PLA as the carrier, and poly vinyl alcohol as the stabilizer, respectively.The mechanism of PLA microspheres formation was developed.

载药体系以硝苯地平为模型药物、聚乳酸（poly-lactic acid， PLA）为载体材料、聚乙烯醇（poly vinyl alcohol， PVA）为稳定剂。

When pumped with 800 nm laser irradiation, 2 {4 [2 (4 dimethylamino phenyl vinyl] phenyl} ethylamino ethanol and 2 {4 [2 (4 diethylamino phenyl vinyl] phenyl} ethylamino ethanol show strong two photon induced blue fluorescence at 436 and 440 nm respectively, while DMANHAS and 4 nitro benzoic acid 2 {4 [2 (4 diethylamino phenyl vinyl] phenyl} ethylamino ethyl ester exhibit no fluorescence.

在800 nm的飞秒脉冲激光激发下，反式-4-(N-羟乙基-N'-乙基氨基)-4'-二苯乙烯和反式-4-(N-羟乙基-N'-乙基氨基)-4'-二苯乙烯均发出较强的蓝紫色上转换荧光，荧光峰分别位于436和440 nm，而DMANHAS和反式-4-[N-(乙氧基羰基-4-硝基苯基)-N'-乙基氨基]-4'-二苯乙烯没有荧光。

The absorbency changes of both thiol and vinyl functional group were monitored independently by FTIR spectrometer during vinyl silazane photopolymerizing with ethanedithiol, Based on the results,the kenitics of reaction was studied and the convertion of both thiol and vinyl functional groups were investigated.

采用傅立叶变换红外光谱法跟踪巯基和乙烯基吸光度的变化，跟踪测定了光聚合反应过程中巯基和乙烯基的转化率，研究了乙二硫醇/乙烯基硅氮烷体系的光聚合反应动力学。

In the presence of catalytic rhodium acetate, ethyl 2-diazo-3-oxo-per fluoroalkanoates, reacted readily with nitriles to give a series of 5-fluoroalkyl substituted 1, 3oxazoles with high regio-selectivity through a metal carbenoid intermediate. The reactions of carbenoids with noncyclic vinyl ethers or cyclic vinyl ethers afforded dihydrofuroates in good to excellent yields. Interestingly, only vinyl C-H insertion compound was obtained concerning of the reaction of carbenoids with 2, 5dimethylfuran due to the steric hindrance of methyl group

醋酸铑分解2-重氮-3-氧代-全氟羧酸乙酯形成的金属卡宾作为1，3-偶极体，可以与一系列芳基或烷基取代的腈反应，高度区域选择性地生成一系列4-乙氧羰基-5-氟烷基取代的噁唑化合物；也可以与富电子的链状和环状的烯基醚反应，以优良的产率得到一系列氟烷基取代的二氢呋喃类化合物；而与2，5-二甲基呋喃的反应，由于甲基的位阻作用，只得到金属卡宾对呋喃3-位烯基碳氢键插入产物。

Use D4 or DMC,vinyl di-blocking agent,ringy vinyl,hexamethyl-disiloxane as raw materials,tetramethyl hydroxyl ammonium as catalyst,we synthesized a vinyl silicone oil.

以D4，乙烯基双封头，乙烯基环体，六甲基二硅氧烷等为原料，四甲基氢氧化铵为催化剂合成了摩尔质量和乙烯基含量不同的乙烯基硅油；以高含氢硅油，含氢双封头，D4合成实验所需的含氢硅油；以白碳黑为填料通过密炼等工序制备了医用高透明液体注射硅橡胶。

The Acting Company's products are: Jindian PVC vinyl floor tiles, Boli Mu PVC vinyl floor tiles, Jie-fu PVC vinyl floor tiles, Gordon, rubber flooring, FLD Hospital Special anti handrails.

公司主要代理的产品的有：金典·PVC胶地板、柏丽姆·PVC胶地板、洁福·PVC胶地板、歌顿·橡胶地板、FLD医院专用防撞扶手。

The corresponding relations between the strain of the static state and dynamic cycle load and the volume resistance of the short chopped carbon fibers, short chopped carbon mat, unidirectional carbon fibers reinforced vinyl resin composites is existed. The physical modes of these kinds of composites are also designed based on the experiment data. The resistance and strain of the short chopped fibers reinforced vinyl composites satisfy the equation of y =A + Bx + Cx~2 in the static strain test method and the short chopped mat reinforced vinyl composites is y = A + Bx.

短切碳纤维、短切碳纤维毡、单向碳纤维增强乙烯基酯树脂复合材料在静态和动态循环载荷下，应变与电阻之间有较好的对应性，同时根据实验数据，建立了不同条件下该复合材料应变和电阻变化规律的物理模型，短切碳纤维增强乙烯基酯树脂复合材料在静态拉伸时电阻与应变之间满足：y=A+Bχ+Cχ~2；碳纤维毡增强乙烯基酯树脂复合材料在静态拉伸破坏时电阻与应变之间满足：y=A+Bχ。

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。