立构规整度

并分析了聚丙烯主链柔顺性和立构规整度对高分子玻璃化转变的影响。

The effects of chain flexibility and tacticity on the glass transition of PP have also been investigated .

介绍了超高相对分子质量和高立构规整度的PVA制备方法；

The production technologies of PVA with ultrahigh relative molecular weight mass and high stereo-tacticity were introduced .

采用了红外光谱和X射线衍射这两种手段对一系列不同立构规整度的聚丙烯腈样品进行了表征。

A range of polyacrylonitrile samples with different isotacticity were characterized by infrared spectroscopy and X-ray diffraction .

这说明红外光谱和X射线衍射这两种方法都可以用来大致测量聚丙烯腈样品的全同立构规整度。

These results show that the infrared spectrum and X-ray diffraction can be used to roughly measuring the isotacticity of polyacrylonitrile . 6 .

X射线衍射图中结晶峰衍射角度与聚丙烯腈的全同立构规整度之间也存在着线性关系。

In X-ray diffraction pattern , there was a linear relationship between the diffraction angle of crystalline peak and the isotacticity of polyacrylonitrile .

并认为，与其他两种PAN相比，CO2PAN等规立构规整度偏低的原因是由于所采用的CO2溶剂的非极性效应所致。

The reason for the isotacticity of CO_2PAN being lower than the other two kinds of PAN was probably due to the nonpolar property of solvent used .

从聚合方法和引发方式综述了国内外合成高相对分子质量及高立构规整度聚乙烯醇（PVA）的研究进展；

The research progress in the synthesis of high relative molecular weight or high stereotacticity polyvinyl alcohol ( PVA ) was reviewed from the aspects of polymerization and initiation processes .

利用核磁共振碳谱和近红外光谱法研究了聚丙烯（PP）微观序列结构，建立了精确测定PP立构规整度的近红外数学模型。

The sequential structure of polypropylene ( PP ) was studied by means of nuclear magnetic resonance ( 13C - NMR ) and near - infrared ( NIR ) in this article . A NIR mathematical model was established for precisely determining the stereoregularity of PP.

首先，借助~（13）C-NMR谱法和IR谱法对聚丙烯腈的立构规整度进行计算，结果表明用~（13）C-NMR谱法所得的结果与实际值比较吻合。

Firstly , the methods of 13C-NMR and IR spectrum were used to evaluate the triad tacticity of PAN . The results showed that the result calculated by the method of ~ ( 13 ) C-NMR were near to the theoretic value .

另外，还研究了包合聚合中实验条件对产物全同立构规整度的影响。

In addition , the effect of experimental factors of inclusion polymerization on the isotacticity of product polymers was investigated .