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solarcell

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[交流] Question: Polymer precipitation

I prepared the polymer containing Pt-backbone. Purification needs several times precipitation. I first dissolved it into dichloromethane and then precipited it from methanol. It was good. When I tried to another precipitation, it failed. No precipitation occured. The same conditions have been applied. what could be the reasons? thanks.
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1楼 2006-08-15 11:34:48
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xiuyuli

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huyuchem(金币+1):good！ thanks！
In my view,there may be some reasons.First,the amount of methanol isn't enough;Second,the concentration of  polymer in dichloromethane solution could be  to low too precipited.
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2楼2006-08-15 21:38:48
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solarcell

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Both are possible. But I use 1:300 ration of dichloromethane and methanol. And the dichloromenthane solution of the polymer is highly concentrated too.

I can not figure out something else. It may exist decomposition. I will check. Thanks
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3楼2006-08-16 02:24:08
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