The product has good catalytic property for the formation of diene stereospecific polymers.

制得叔碳酸钕具有对二烃良好定向聚合活性。

Dibenzylidene sorbitol is known as a gelling agent for polyolefln resin.

二亚苄基山梨醇是一种聚烃树脂成核剂。

Compared with diolefine rubber,EPDM has less double bond.

与二烃橡胶相比,EPDM双键很少。

It is caused by the property change of feed stock in storage process and alkadiene polymerization.

造成这一问题主要原因，是原料油性质在存储过程中发生变化、二烃发生聚合。

Recent advances in ring closing metathesis (RCM) reaction, including olefin and enyne metathesis reaction are reviewed.

综述了近几年来分解(RCM)反应研究进展,包括了烃、-RCM反应。

PASP-PEG block structure copolymer,comb shaped PASP-PEG block structure copolymer,aspartic acid and glycine,glutamic acid or propalanine copolymer are prepared.

还可以对聚天冬氨酸侧链进行改性,引入烷基或烃基、反应活性高氨基酸酯、磺酸基等功能性基团,使其得到更广泛应用。

Three Yuan second grade third rubbers (EPDM) is the ethylene, the propylene and the few non-conjugate diolefin copolymer.

三元乙丙橡胶（EPDM）是乙、丙和少量非共轭二烃共聚物。

In this thesis, the carbozincation of acetylenic sulfones and its applications in the stereoselective synthesis of polysubstituted olefins were investigated.

本论文研究了基砜碳锌化反应及其原位产生α-磺酰基基锌试剂在立体选择性合成多取代烃中应用。

The benzene ring and alkene structural group are much more stable than structural group of sulfoacid for the carbonifying process of polystyrene.

在碳化过程中，聚苯乙阳离子交换树脂苯结构和烃基团比磺酸基团稳定。

Ethyl phenylacrylate intermediate bringing a double bond was introduced first,which is subsequently transformed into triketone and then DCM was obtained with high purity.

采用具有烃骨架β-苯基丙酸酯为中间体先引入双键,再经过三酮合制备乙基吡喃。

The diolefins and alkenyl aromatics are very unstable components which can give gums by polymerization.In giving olefins and alky aromatics the hydrogenation improves the product quality.

二烃和基芳烃是非常不稳定组分，可聚合产生凝胶。对于给定烃和烷基芳烃，氢化可以改善产品质量。

The catalysts used to hydrogenate polymer containing polydiolefin units are introduced in this paper.The mechanism of SBS hydrogenation and the development of the kinetics are also referred to.

介绍了目前用于含聚双烃链节聚合物加氢催化剂种类，讨论了SBS加氢机理及加氢动力学研究进展。