Znn3bq.jpeg
²é¿´: 1321  |  »Ø¸´: 5
±¾Ìû²úÉú 1 ¸ö ·­ÒëEPI £¬µã»÷ÕâÀï½øÐв鿴
µ±Ç°Ö»ÏÔʾÂú×ãÖ¸¶¨Ìõ¼þµÄ»ØÌû£¬µã»÷ÕâÀï²é¿´±¾»°ÌâµÄËùÓлØÌû

GY2009

½ð³æ (ÕýʽдÊÖ)

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
ÈË£¬Éú
2Â¥2010-11-05 20:30:54
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
Ïà¹Ø°æ¿éÌø×ª ÎÒÒª¶©ÔÄÂ¥Ö÷ 906632716 µÄÖ÷Ìâ¸üÐÂ
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¿¼ÑÐ] ÉúÎïѧ308Çóµ÷¼Á£¨Ò»Ö¾Ô¸»ª¶«Ê¦´ó£© +6 ÏàÐűػá¹ââÍòÕ 2026-04-10 6/300 2026-04-11 05:23 by zhuwenxu
[»ù½ðÉêÇë] ɽ¶«Ê¡»ù½ð2026 +3 jerry681 2026-04-08 4/200 2026-04-10 16:02 by jerry681
[¿¼ÑÐ] 311Çóµ÷¼Á +11 xypÏë¶ÁÊé 2026-04-10 12/600 2026-04-10 15:15 by solbeg
[¿¼ÑÐ] Ò»Ö¾Ô¸Î÷½»»úеר˶Çóµ÷¼Á +8 ÇóÉϰ¶µÄСÍõ 2026-04-10 8/400 2026-04-10 15:09 by hemengdong
[¿¼ÑÐ] 284Çóµ÷¼Á +7 archer.. 2026-04-09 8/400 2026-04-09 21:30 by bljnqdcc
[¿¼ÑÐ] 269µç×ÓÐÅÏ¢Çóµ÷¼Á£¬¿Éתרҵ +9 ¶À×Ãwl 2026-04-06 9/450 2026-04-09 20:55 by laoshidan
[¿¼ÑÐ] 267Çóµ÷¼Á +5 ÔÙæҲҪ³Ô·¹°¡ 2026-04-09 5/250 2026-04-09 18:47 by stone_128
[¿¼ÑÐ] ÉúÎïѧµ÷¼Á£¬Ò»Ö¾Ô¸Î÷ÄÏ´óѧ348£¬TopÆÚ¿¯Ò»Çø¶þ×÷¡¢¶þÇøÈý×÷£¬ÈýµÈ½±Ñ§½ðÈý´Î +4 candyyyi 2026-04-09 4/200 2026-04-09 18:39 by l_paradox
[˶²©¼ÒÔ°] ÐÂÒ»´úµç×ÓÐÅÏ¢294Çóµ÷¼Á ²»ÌôѧУ +5 Ytyt11 2026-04-09 6/300 2026-04-09 14:40 by Ytyt11
[¿¼ÑÐ] 328Çóµ÷¼Á +17 lftmya 2026-04-07 18/900 2026-04-09 08:05 by 5268321
[¿¼ÑÐ] 318Çóµ÷¼Á +13 ykyhsa 2026-04-05 15/750 2026-04-08 21:37 by wj165256
[¿¼ÑÐ] 312Çóµ÷¼Á +4 Say Never 2026-04-04 4/200 2026-04-08 08:41 by barlinike
[¿¼ÑÐ] ¼ÆËã»ú11408 287 Çóµ÷¼Á +3 LiLe5 2026-04-07 3/150 2026-04-07 23:15 by shanqishi
[¿¼ÑÐ] Ò»Ö¾Ô¸±±¾©»¯¹¤085600 310·ÖÇóµ÷¼Á +20 0856²ÄÁÏÓ뻯¹¤3 2026-04-04 22/1100 2026-04-07 15:14 by Éϰ¶¿ì¿ì
[¿¼ÑÐ] ²ÄÁϵ÷¼Á +11 Ò»ÑùYWY 2026-04-07 11/550 2026-04-07 15:13 by shdgaomin
[¿¼ÑÐ] 333Çóµ÷¼Á +6 ºÏ³ËÑîϰϦ 2026-04-06 6/300 2026-04-07 09:44 by Öí»á·É
[¿¼ÑÐ] 0817»¯Ñ§¹¤³ÌÓë¼¼ÊõÇóµ÷¼Á£¬Ò»Ö¾Ô¸Öк£Ñó319 +14 lv945 2026-04-04 14/700 2026-04-06 10:20 by À¶ÔÆË¼Óê
[¿¼ÑÐ] ²ÄÁϵ÷¼Á +14 Ò¼·¡·¡ÒÚ 2026-04-04 14/700 2026-04-05 23:31 by À´¿´Á÷ÐÇÓê10
[¿¼ÑÐ] 298Çóµ÷¼Á +7 manman511 2026-04-05 7/350 2026-04-05 10:29 by ÌÆãå¶ù
[¿¼ÑÐ] 278Çóµ÷¼Á +14 ·¶æÃÄÈ 2026-04-04 15/750 2026-04-04 22:15 by lqwchd
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û