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The poly(siloxane amic acid) intermediate A was synthesized in a mixture of THF/NMP. Because for siloxane-containing polyimide, the utilization of cosolvents was found to be advantageous and critical to maintain the homogeneous nature of the reactants and obtain high molecular weight copolymers.

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peixl999(½ð±Ò+5, ·­ÒëEPI+1): 2010-09-06 15:38:30
The poly(siloxane amic acid) intermediate A was synthesized in a mixture of THF/NMP. As for siloxane-containing polyimide, the utilization of cosolvents was found to be advantageous and critical to maintain the homogeneous nature of the reactants and obtain high molecular weight copolymers.
2Â¥2010-09-06 15:35:00
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peixl999(½ð±Ò+5): 2010-09-06 20:49:44
Polyamide acid intermediate A contained siloxane is synthesized in the mixed solventTHF/NMP.That is because it is benifit and crucial for the usage of the mixed solvent ,which can  maintain the homogeneous phase conditions of reactants and obtain  high molecular weight copolymers.
3Â¥2010-09-06 15:59:24
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