中文摘要：

聚乙烯粉末样品的 wideline 质子 NMR 系列从三个部件以贡献被分析:( 1 )有不动的链的僵硬部分，( 2 )与生产 Lorentzian 贡献到光谱的像液体的特性一起的一个软区域，并且( 3 )关于 CC 的甲又组的旋转在结合的 intermediateregion 部分被妨碍。相对集体部分以及链活动性在不同聚合技术生产的样品之中极大地变化了。NMR crystallinity 同意了很好，那由 WAXD 估计了并且比 DSC crystallinity 高得多，显示从水晶非结晶的分裂期间的贡献的包括。当采用聚合技术的一样的类型时，在僵硬部分的水晶的缺点能被处理参数显著地影响。在 NMR 系列的中间的区域高根据在 bimodal 之间的比较被分析密度聚乙烯和相应线性单峰的聚乙烯。NMR 分裂期间的集体部分能是在水晶的 lamellae 之间的领带分子的百分比的一个指示并且可以显著地因此影响聚合材料的机械性质，这被发现。

英文摘要：

The wideline proton NMR spectra of polyethylene powder samples were analyzed in terms of contributions from three components： （1） a rigid part with immobile chains, （2） a soft region with liquid-like character which produces a Lorentzian contribution to the spectrum, and （3） an intermediate region in which the rotation of methylene groups about C-C bonds is partially hindered. The relative mass fractions as well as chain mobilities varied greatly among samples produced by different polymerization techniques. The NMR crystallinity agreed well with that estimated by WAXD and was much higher than DSC crystallinity, indicating an inclusion of the contribution from a crystalline-amorphous interphase. The crystalline defects in the rigid part could be significantly affected by processing parameters when employing the same type of polymerization technique. The intermediate region in the NMR spectra was analyzed according to the comparison between bimodal high density polyethylene and corresponding linear unimodal one. It was found that the mass fraction of the NMR interphase could be an indication of the percentage of tie molecules between crystalline lamellae and thus may significantly affect the mechanical properties of polymeric material.