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petrocatal

ľ³æ (ÕýʽдÊÖ)

906632716(½ð±Ò+4): 2010-11-07 15:43:37
The polyethylene glycol(PEG) are widespreadly applied to medicine synthesis snd yet the direct use is limited due to the low end activity of hydroxyl groups. The application of PEG could be extended with the conversion of the hydroxyls to the carboxyls. Especially when used in the synthesis of  dipolymers, the hydrophilic chains were replaced by hydrophobic chains for increasing hydrophilic property of the brindge chains. Poly(diethylene Glycol Succinate) was synthesied with polyethylene glycol and succinic anhydride as reactants, and pyridine as the solvent. The results showed that the with enough reaction.
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3Â¥2010-11-06 04:59:05
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GY2009

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906632716(½ð±Ò+5, ·­ÒëEPI+1): 2010-11-07 15:43:24
The polyethylene glycol has the very widespread use in the medicine synthesis, but its end hydroxyl's activeness is relatively low, the direct application is restricted, if activates the hydroxyl for the carboxyl group may expand its application areas. Especially in the synthesis of  dipolymers,the hydrophilic chain was changed into hydrophobic chain to ehanced the hydrophilic property. With polyethylene glycol and succinic anhydride for reactants,pyridine as the solvent ,the Poly(diethylene Glycol Succinate) was synthesized respecvtively.The results showed that the reaction was completely done if the reaction time was enough.
Poly(diethylene Glycol Succinate) ¾Û¶þÒÒ¶þ´¼¶¡¶þËáõ¥  ÍøÉϲéµÄ¶¼ÊÇÕâ¸öÃû³Æ Èç¹ûÄãµÄÃû³Æ²»ÊÇÕâ¸öµÄ»°Äã×Ô¼ºÐÞ¸ÄһϠ   Îҵķ­Ò빩Äã²Î¿¼
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2Â¥2010-11-05 20:30:54
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petrocatal

ľ³æ (ÕýʽдÊÖ)

906632716(½ð±Ò+1): 2010-11-07 15:43:42
The polyethylene glycol(PEG) are widespreadly applied to medicine synthesis snd yet the direct use is limited due to the low end activity of hydroxyl groups. The application of PEG could be extended with the conversion of the hydroxyls to the carboxyls. Especially when used in the synthesis of  dipolymers, the hydrophilic chains were replaced by hydrophobic chains for increasing hydrophilic property of the brindge chains. Poly(diethylene Glycol Succinate) was synthesied with polyethylene glycol and succinic anhydride as reactants, and pyridine as the solvent. It was found  that reactants could consumed conpletely with enough reaction time.
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4Â¥2010-11-06 05:05:23
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petrocatal

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