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[求助]
聚合物化学一段话，求好心人翻译
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| In the first of these , the kinetics are such that there is a gradual build up of high relative molar mass material as reaction proceeds, with the highest molar massmolecules not appearing until the very end of the reaction. On theother band, chain reactions,which occur only at a relatively few activated sites within the reacting medium, occur with rapid build up of a few high relative molar mass molecules while the rest of the monomer remains unreacted. When formed , such macromolecules stay essentially unchanged while the rest of the monomer undergoes conversion. This means that large molecules appear very early in the polymerization reaction, which is characterised by having both high relative molar mass and monomer molecules present for most of the duration of the reaction. |
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2楼2013-03-24 22:22:51