沪江词库精选polar aprotic solvents是什么意思、英语单词推荐 极性非质子溶剂 相似短语 polar aprotic solvents 极性非质子溶剂 preferential solvents 选择溶剂 aprotic solvent 疏质子溶剂 chemical solvents 化学熔剂 double solvents 复合溶剂,复溶剂 nonaqueous solvents 非水溶剂 aprotic liquid laser 质子...
ahese polymers showed good solubility in polar aprotic solvents, such as dimethylacetamide (DMAc), dimethylsulfoxide (DMSO), and NMP. The chemical structures of the polymers were confirmed by FT-IR and 1H NMR spectra. hese聚合物在极性aprotic溶剂显示了好可溶性,例如dimethylacetamide (DMAc),二甲亚砜 ...
Themonomerin these reactions becomes inert and cannot take part in the reaction. Thus, bases and polar aprotic solvents should be avoided as they represent radical sinks. It is also observed that the catalytic activity is lowered when using coordinating solvents as competing reactions occur.59Solven...
Since these polar, aprotic solvents cannot form hydrogen bonds among themselves, a mechanism must exist by which entropy can decrease without invoking properties unique to hydrogen bonds. A qualitative model relating entropy changes to free volume is proposed. 展开 ...
Polar Aprotic Solvents: A Table Polar Protic Solvents: A Table Notes 1. What Is A Solvent? Let’s back up. What’s a solvent, anyway? A solvent is aliquidthat serves as the medium for a reaction. It can serve two major purposes: ...
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5) dipolar aprotic solvent 偶极非质子溶剂6) non-polar solvent 非极性溶剂 1. In polar solvents, the swelling ratio of Shenhua coal was larger than that of Xinzhuang coal having a high coal rank; however, in non-polar solvent tetralin, it was smaller. 结果表明:在极性溶剂中,煤化程度较...
In polar solvents, the swelling ratio of Shenhua coal was larger than that of Xinzhuang coal having a high coal rank; however, in non-polar solvent tetralin, it was smaller. 结果表明:在极性溶剂中,煤化程度较小的神华煤的溶胀性比新庄煤大,而在非极性溶剂四氢萘中,情况相反;温度升高加快了煤的...
It was shown that polyamic acids form similar complexes with aprotic solvents. The isomeric composition of PMA complexes was investigated and isomerization of PMA in solution under mild conditions was observed.DOI: 10.1002/actp.1984.010350410 被引量: 15 ...