丁烯

A range of waterborne alkyd resins has been prepared by fatty acid process, based on soybean fatty acid, trimellitic anhydride, and various polyols and polybasic carboxylic acids, which are modified with benzoic acid, maleic anhydride and oleic acid.

通过脂肪酸法，选用豆油脂肪酸、偏苯三甲酸酐和不同的多元醇、多元酸制备了一系列水性醇酸树脂，用苯甲酸、顺丁烯二酸酐和油酸对其改性进行了研究。

Water-soluble air drying alkyd resin is formulated by flax oil acid,trimethylol propane,dimethyl isophthalate,benzoic acid,maleic anhydride and trimellitic anhydride.

以亚麻油酸、三羟甲基丙烷、间苯二甲酸、苯甲酸、顺丁烯二酸酐、偏苯三酸酐为原料合成水溶性醇酸树脂，中和后制得的涂料具有干性好、硬度高、耐水性和贮存稳定性优良等特性。

Compound 6 is a three-dimensional structure consisted of the independent uncharge components , and HO via hydrogen bonds linking together.

合成了超分子化合物［Mn〓〓〓〓］〓［Mn〓〓］〓2H〓O6和［Cd〓〓］7（C〓H〓O〓＝反丁烯二酸根），测定了它们的晶体结构。

Oil and polyol firstly hydrolyze, and then react with maleic anhydride to give semi ester, the residual maleic anhydride hydrolyzing to give maleic acid, finally are adducted with DCPD. The result of experiment shows that the synthesized resin is of perfect air drying performance and improved flexibility and anti-greening because of the use of oil, meetin...

试验结果表明，油与多元醇在210～220℃下先醇解，然后与顺酐反应形成半酯，剩余顺酐水解成顺丁烯二酸，然后与DCPD加成，合成的树脂具有优良的空干性；同时油的使用极大地提高了涂膜的柔韧性和抗绿化性，得到的树脂性能上可满足涂料用不饱和聚酯树脂的要求。

Then MAL is converted into methylacrylic acid through oxidation. At last, MAA is esterified to MMA with methanol.

日本旭化成公司以异丁烯为原料，得到MAL后直接氧化酯化的方法正在开发中。

Well balance between acid and hydrogenating functions is also found for Pt/Al-SBA-15 catalyst.

而且几乎在整个反应时间内40SBA-15催化剂的总丁烯转化率最高，C〓中的TMP产物的比例最大，显示出良好的稳定性。

A four ball tester was used to evaluate the antiwear and extreme pressure properties of antimony dialkyldithiophosphate with friction reducer containing phosphorus, chlorinated paraffin(T301) and sulfurized isobutylene (T321), and their synergistic effects.

利用四球试验机评价了二烷基二硫代磷酸锑与含磷摩擦改进剂、氯化石蜡(T301)、硫化异丁烯(T321)3种添加剂的极压和抗磨性能，以及它们之间的极压和抗磨协同作用；利用市售演示仪评价了SbD-DP、T301和T321之间的协同抗擦伤能力。

The procedure used was the same as above except that the reaction mixture was sealed in an ampule under vacuum and placed in an oil bath at 1000C using maleic anhydride and EtMI as comonomers.

所采用的程序是一样的，除了上述反应混合物被密封在一安瓿真空条件下并放置在一油浴在1000c使用顺丁烯二酸酐和etmi作为comonomers 。

The maleic and o - phthalic anhydrides and CH3COOC2H5 only lead to partly chlorinesubstituted polysilanes.

而顺丁烯二酸酐、邻苯二甲酸酐和乙酸乙酯则只进行不完全的Cl取代，根据分子活性的不同得到取代比率各不相同的共聚物。

Due to the ring strain and Lewis acid character, silacyclobutanes and silacyclobutenes can undergo ring expansion reactions to afford five- and six-membered silacycles, or ring opening to give organosilicon molecules and materials as well as fulfill organic transformations under very mild conditions.

硅杂环丁烷和硅杂环丁烯由于存在环张力和具有一定的Lewis酸性，能够通过扩环反应生成五元和六元含硅杂环化合物，也能够通过开环反应生成不同结构的有机硅分子和聚合物，抑或实现有机反应在温和条件下的转化。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。