乙烯

1Nm. The content of this intermediate fraction was found to increase with increasing λ.

对POE体系的研究结果表明，高弹性的POE不但存在结晶，且结晶中单斜晶含量明显高于其它的乙烯共聚物。

This dissertation was designed to study heteto-phase grafting polymerization of vinyl acetate , maleic anhydride and VAC/MAH binary monomer system, irrespectively, with low density polyethylene film as substrate and benzophenone as photoinitiator. The purpose is to develop new and more effective methods to modify the surface and buck properties of polyolefines by studying the grafting mechanism of the system and exploring the characteristics of the grafting process.

本文主要以低密度聚乙烯膜为基体膜，以二苯甲酮为光引发剂，分别对醋酸乙烯酯、马来酸酐以及VAC/MAH的非均相接枝聚合反应进行了系统研究，以探讨相关的接枝反应机理、接枝反应过程以及接枝工艺的可行性，目的在于建立聚烯烃材料本体和表面改性新方法。

The industrial manufacturing technique, the trend of development of neohexene ,and the characteristics of these production technique were reviewed and analyzed in the paper, particularlyabout the selective dimerization of isobutylene and metathesis of βdiisobutylene with ethylene were introduced.

对新己烯生产技术的现状和今后的发展趋势进行了综述，分析了由异丁烯和乙烯生产新己烯的技术特征，讨论了烯烃二聚工艺和催化剂、烯烃复分解工艺及相应的催化剂，指出了各种工艺的优势和不足。

The photochemical graft copolymerization of isoprene on the surface of tetrafluoroethylene-propylene copolymer was effected by external magnetic field.

我们已经报道了异戊二烯在四氟乙烯一丙烯共聚物的光化学接枝反应，并且证实了该反应是按三重态机理进行的〔l。

The results show that the Avrami equation is able to successfully describe the simulated isothermal crystallization process of PEO.

用Monte Carlo方法模拟了聚氧化乙烯在预先成核条件下的等温结晶过程，并用Avrami方程进行了结晶动力学处理。

Methods: Polytetrafluoroethylene and polypropylene film electrets were prepared by constant voltage corona charging at room temperatures. The charge-store stability of PTFE and PP were studied by measuring isothermal surface potential decay after different dose of ultraviolet radiation.

用常温恒压电晕充电系统将聚四氟乙烯和聚丙烯两种材料极化制备成驻极体；用补偿法测量不同剂量的紫外照射后驻极体的表面电势。

Lube Jell with PTFE from Radio Shack works well in this PVC piston/plunger assembly.

润滑油与jell聚四氟乙烯从Radio Shack的工程，以及在这聚氯乙烯活塞/柱塞大会。

It is important theoretically and practically that the ketene photodissociationas a model system for unimolecular dissociation.

乙烯酮分子的光解反应作为研究单分子解离的模型系统具有重要的理论和实际意义。

Photodissociation dynamics of ketene at 218 nm has been investigated using the velocity map ion-imaging method.

用离子速度成像方法研究了乙烯酮分子在218 nm光解下的光解动力学，得到了光解产物CO的共振多光子电离谱，以及在不同振转态的角分布和平动能分布。

Reactions of ketene (CH2CO) with some small molecular free radicals play an important role in combustion and atmospheric chemistry. The experimental and theoretical studies to these reactions have attracted many interests of chemists these years.

乙烯酮(CH2CO)与某些小分子自由基的反应在燃烧和大气化学中起着重要作用，近年来已成为化学家们广泛关注的研究课题之一。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新