用双金属氰化物(DMC)络合催化剂可制得相对分子质量高、相对分子质量分布窄和不饱和度低的聚醚多元醇。
The polyether polyols which has higher molecular weight, narrower molecular weight distribution and lower unsaturation can be prepared by using double metal cyanide (DMC) complex catalysts.
研究了豌豆淀粉的颗粒性质，包括颗粒的形貌、X光衍射图样、链淀粉含量、分子量分布、溶解度与膨胀度等。
Some properties of the pea starch granules were studied, including microphoto, graphic form, X-ray diffraction pattern, amylose content, molecular weight distribution, solubility and swelling power.
BOPP产品的物理性能主要由树脂的分子量、等规度、分子量分布这三个基本物性决定。
BOPP physics performance can be mainly decided by molecular weight, molecular weight distribute and isotactic of resin.
实验发现，用DMC催化剂合成的聚醚与用KOH催化剂合成的聚醚相比不饱和度低，相对分子质量高，相对分子质量分布窄。
The polyether polyols prepared by these DMC catalysts are of low unsaturation, high relative molecular mass, narrow molecular distribution compared with traditional KOH catalysts.
刚性和结晶度下降，分子量分布变宽，提升了PP发泡性能。
The rigidity and the crystallinity decreased, the molecular weight distribution becomes wider, improve the foaming properties of PP.
这些环化物对聚合产物的分子量、分子量分布和官能度都有较显著的影响。
The cyclic compound so obtained has profound effects upon the MW, MWD and functionability of the polymer product.
焙烧使稀土在分子筛中的分布更均匀，减少稀土离子的影响，因此经过焙烧的含稀土分子筛的结晶度测量值下降较少；
The distribution of RE in zeolite trends to be even during calcination, thus the effect of RE cations on the determination of crystallinity is less for calcined RE-exchanged zeolite Y.
焙烧使稀土在分子筛中的分布更均匀，减少稀土离子的影响，因此经过焙烧的含稀土分子筛的结晶度测量值下降较少；
The distribution of RE in zeolite trends to be even during calcination, thus the effect of RE cations on the determination of crystallinity is less for calcined RE-exchanged zeolite Y.
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