vinyl group

英 [ˈvaɪnl ɡruːp]

美 [ˈvaɪnl ɡruːp]

网络  乙烯基; 万恩佑; 至乙烯基组; 乙烯基团

英英释义

noun

• a univalent chemical radical derived from ethylene
  Synonym:vinylvinyl radical

双语例句

• Flame-retardant LLDPE/ PDMS blends were prepared by melt blending of LLDPE, silicone rubber PDMS containing high content of vinyl group and flame-retarding master-batch.
  采用高乙烯基含量硅橡胶（PDMS）与线性低密度聚乙烯（LLDPE）进行熔融共混，并添加阻燃母料，制得LLDPE/PDMS阻燃共混物；
• When it was substituted by other heterocyclic groups, the anesthetic activity decreased. However, some substituted vinyl groups were effective substitutes for 1-β-phenyl group.
  结果表明1-β-苯基对麻醉活性起重要作用，被杂环基团取代活性下降，但某些取代乙烯基是可替代该苯基产生强效活性的一个有效结构。
• Glycidyl methacrylate was a vinyl monomer having epoxy group. The polymer poly ( glycidyl methacrylate) containing epoxy group can be prepared with glycidyl methacrylate by homopolymerization or copolymerization.
  甲基丙烯酸缩水甘油酯（GMA）是一种含环氧基的烯类单体，通过均聚合或者共聚合可以制备带有环氧基团的聚合物大分子。
• It was found that, with more dimethacrylate introduced, the crosslinking density increased, which put more restriction to the diffusion of transition metal complex, giving rise to a faster polymerization rate and a higher vinyl group conversion.
  研究发现，交联单体用量增加导致交联网络密度增大，过渡金属络合物的扩散受阻严重，从而使聚合速率和双键转化率都增加；
• The modification methods and principle of polyvinyl alcohol ( PVA) were reviewed before and after vinyl acetate co-polymerization. The pre-modification was to copolymerize vinyl acetate with unsaturated compounds containing amido, carboxyl, epoxy or sulfonic group.
  综述了聚乙烯醇（PVA）在醋酸乙烯共聚前后改性的方法和原理，前期改性是选用带有酰胺基、羧基、环氧基、磺酸基的不饱和化合物与醋酸乙烯共聚；
• The silicone-acrylate emulsion and architectural coating were prepared with acrylate and silicone intermediate which was synthesized by vinyl group silicone monomer and cyclo-form silicone monomer.
  先将乙烯基有机硅单体及环状有机硅单体在碱催化下，合成有机硅预聚体，再与丙烯酸酯进行共聚制得硅丙乳液及其建筑涂料。
• While two sorts of ferrocene units appeared in the cationic copolymer: one had a pendent vinyl group which had not taken part in the polymerization, and the other had a cross-linking structure with two alkenyl groups.
  而阳离子共聚物的二茂铁单元有两种不同结构：一个烯基未参与聚合反应的悬挂结构（38.9%）和两个烯基分别成链的交联结构（61.1%）。
• The introduction of the vinyl monomer containing polar group into PP macromolecular chain could improve the flame retardance of PP obviously.
  在PP大分子链上接枝含极性基团的乙烯基单体，可显著提高PP的阻燃性能；
• The electrophilic reaction of methyl pyropheophorbide-a ( MPP-a) demonstrates that the electrophilic addition reaction and the electrophilic substitution reaction occur on the vinyl group at 3-position and 20-meso-position, respectively.
  焦脱镁叶绿酸a甲酯与溴素的亲电反应表明：在3位乙烯基上发生亲电加成反应，而与20位的meso氢则发生亲电取代反应。
• The results showed that the vinyl ester of disproportionated rosin consisted mainly of vinyl ester of dihydroabietic acid and dehydroabietic acid in 3: 4 ( wt), their vinyl group was a typical ABX system in the NMR.
  结果表明：国产歧化松香乙烯酯的主要成分是二氢枞酸和脱氢枞酸的乙烯酯，二者重量比为3：4；