查询词典 styrene

When using urea-hydroperoxide as oxygent, just the trimethylphosphine adsorbed on the Lewis acid sites in TS-1 zeolite was oxidized. It further confirmed that the hydroperoxo-titanium species formed by the interaction between the titanium in Lewis acid sites and urea-hydroperoxide are the active oxidation center, and the titanium in the framework as Lewis acid sites enhances the oxidation ability of hydroperoxide. 3. Phenylacetaldehyde and benzaldehyde are found to be the major products in the catalytic oxidation of styrene over TS-1 zeolite, and styrene epoxide is not as speculated detected.

当以过氧化氢尿素为氧化剂时，室温条件下吸附在TS-1分子筛Lewis酸性位的三甲基膦即能被氧化，由此进一步证明，TS-1分子筛中由Lewis酸性位的骨架钛与过氧化氢相互作用形成的过氧化钛物种是三甲基膦氧化反应的活性中心，骨架钛作为Lewis酸中心提高了过氧化氢的氧化能力。

The organic montmorillonite VC18-MMT was prepared by the exchanging inorganic cations with vinylbenzyldimethyloctadecylammionun chloride which could be co-polymerized with styrene.The predispersion of VC18-MMT was realized via sonicating the suspension of the montmorillonite particles in emulsifier solution,and then the styrene was added into the system and the in situ emulsion polymerization was carried out to prepare PS/VC18-MMT nanocomposites.

以可与苯乙烯发生共聚的阳离子表面活性剂乙烯苄基二甲基十八烷基氯化铵为插层处理剂改性蒙脱土（VC18-MMT），有机蒙脱土在超声波强剪切作用以及乳化剂作用下预分散在乳化剂溶液中，然后引入苯乙烯单体进行原位乳液聚合制备聚苯乙烯/蒙脱土纳米复合材料。

Selecting water-borne styrene/acrylic anti-rust latex of soapless polymerization technology as binder,iron oxide red and aluminum triphosphate as anti-rust system and nano SiO_2 paste,we prepared water-borne nano-modified styrene/acrylic anti-rust primer,properties of which reached the level of solvent-borne alkyd antirust coatings.

本试验选用无皂聚合工艺制备的水性苯丙防锈乳液为基料，氧化铁红与三聚磷酸铝组成防锈体系，添加纳米SiO_2浆料，制备的水性纳米改性苯丙防锈底漆性能达到溶剂型醇酸防锈涂料的水平，并分析了乳液、防锈颜料、纳米SiO_2对水性苯丙防锈底漆性能的影响。

A series of sulphonated SBS were achieved by reacting SBS blockcopolymer with sulphuric acid, meanwhile, the blends of PVC andsulphonated SBS were studied. By means of strength capabilityexamination and DSC analysis, it was found the miscibility wasincreased after SBS was sulphonated.2 The chemical grafting of styrene and PVC membrane2.1 The reaction condition of graftingBy means of the swelling and seepage of Styrene to PVC film,St was grafted onto PVC film by the initiation of BPO .

采用硫酸对热塑性弹性体SBS进行磺化，得到不同磺化度的产物，并对其与PVC的物理共混进行了研究；通过力学性能及DSC测试，发现SBS磺化后增加了与PVC的相容性(来源：Af2a2a2BC论文网www.abclunwen.com)。2 苯乙烯与聚氯乙烯膜的化学接枝2.1 苯乙烯与聚氯乙烯膜接枝条件利用苯乙烯对PVC的溶胀渗透，在过氧化苯甲酚的引发下发生接枝共聚反应。

With the addition of sulfur, high performance and storage-stable Styrene-Butadiene-Styrene triblock copolymer -modified asphalts were studied with reactive blending.

研究了以硫黄为交联剂时的SBS反应共混改性沥青，获得了高性能、稳定化的SBS改性沥青。

PART TWO In Part two of this paper, N-(2, 4, 6-tribromophenyl) maleimide was copolymerized with styrene and acrylonitrile (1), with styrene、acrylonitrile and Nphenylmaleimide (2), with acrylonitrile (3) by suspension polymerization.

第二部分在本论文第二部分，采用三溴氮苯基马来酰亚胺分别与苯乙烯和丙烯腈，苯乙烯、丙烯腈和氮苯基马来酰亚胺，丙烯腈进行悬浮聚合。

Styrene degassing tower is one of chief equipments of styrene monomer recover system of StyreneButadiene Rubber device.

苯乙烯脱气塔是丁苯橡胶装置中苯乙烯单体回收系统的主要设备。

When ATRP of styrene was investigated with 1-phenylethyl bromide/benzyl a,a-dibromide mixture as initiator, the GPC chromatogram shows two elution peaks and the molecular weighs of the peaks are approximately in a 2/1 ratio. It suggests that benzyl dibromide is a difunctional initiator of ATRP of styrene. The analysis of end group using 1H-NMR also proves the result above.

采用1-苯基溴乙烷／α，α-二溴化苄混合引发剂进行苯乙烯的ATRP反应时，所得聚苯乙烯的GPC谱图为双峰，分子量相差一倍，初步证明了α，α-二溴化(来源：ABf399C论文网www.abclunwen.com)苄引发苯乙烯ATRP反应时是双官能引发剂，并用~1H-NMR对聚合物结构进行分析，进一步证明了α，α-二溴化苄引发苯乙烯ATRP时是双端同时增长的。

Water samples collected off Malaysia and the U.S. Pacific coast and in the northern Pacific Ocean all contained styrene monomers, as well as styrene dimers and trimers, reported Katsuhiko Saido of Nihon University in Chiba, Japan.

日本大学千叶校区的卡素西口赛一朵称：收集于远离马来西亚海岸、美国太平洋海岸和北太平洋的水样本都含有苯基团单体，二聚体和三聚体。

In the mixed solvent of dimethyl phthalate / TBP or phenyl ether / TBP, the selectivity for styrene oxide is good but the conversion of styrene is low due to the coordination to the catalyst of the solvent.

邻苯二甲酸二甲酯或二苯醚等与磷酸三丁酯的混合溶剂中环氧化的选择性较高，但由于溶剂对催化剂的配位作用抑制了催化剂的活性，苯乙烯转化率很低；当部分的邻苯二甲酸二甲酯或二苯醚被甲苯取代后，苯乙烯的转化率提高，生成环氧苯乙烷的选择性不变。

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。