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plastics6322
½ð³æ (СÓÐÃûÆø)
- Ó¦Öú: 2 (Ó×¶ùÔ°)
- ½ð±Ò: 1399.2
- ºì»¨: 1
- Ìû×Ó: 223
- ÔÚÏß: 179.5Сʱ
- ³æºÅ: 651906
- ×¢²á: 2008-11-11
- רҵ: ¸ß·Ö×ÓÎïÀíÓë¸ß·Ö×ÓÎïÀí»¯
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whutfanfan(½ð±Ò+2,VIP+0):лл 4-1 23:12
whutfanfan(½ð±Ò+2,VIP+0):лл 4-1 23:12
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È·¶¨ÊÇdiethyl ether£¬½ãÃà ¶øÇÒÎÒ»¹ÓÐÒ»¸ö½ñÄêµÄÎÄÕÂÄãÒª²»Òª? ÁôÏÂÄãµÄÓÊÏ䣬Ƕ¶Î½ºÊø£¬ºÃÍæ To vary the [CL]/[EO] from 0.11 to 0.31, different amount of ¦Å-CL was added tomPEG. For [CL]/[EO] = 0.31, 8.06 g (4.03 mmol) of dried mPEG was completely dissolved in 80mL of anhydrous toluene. To remove any trace of water, a dean stark trap was used for 25 min. Then, 10.07 g (88.33 mmol) of ¦Å-CL and 1.61 g (3.98 mmol) of SnOct2 were added to the mPEG solution. The ring opening polymerization for PEO¨CPCL diblock copolymer was conducted for 14 h at 140 ◦C. For the synthesis of PEO¨CPCL¨CPEO triblock copolymer, 0.34 g (2.01 mmol) of HMDI was added to the reaction mixture and it was reacted for further 8 h at 60 ◦C. The product was precipitated in diethyl ether and kept in a refrigerator at 5 ◦C for 1 day. The supernatant solventwas removed after ultracentrifugation at 14,000rpm for 3 h, and was followed by vacuum drying. Then PEO¨CPCL¨CPEO ÎÒ¾õµÃÔÀíÊÇÕâÑùµÄ£¬ÔÚÈܼÁÀïÃæPEO¨CPCL¨CPEO»áÐγÉÒ»¸ö¸ö½ºÊø£¬ÈÃËüÃdzÁµíÏÂÀ´Ò²¾ÍÊÇÆÆ»µ½ºÊøµÄÎȶ¨ÐÔ£¬¶øPEOÔÚÒÒÃÑÖÐÄÑÈÜ¡£ [ Last edited by plastics6322 on 2009-4-1 at 10:51 ] |
8Â¥2009-04-01 10:45:14
wgh8781
½ð³æ (СÓÐÃûÆø)
- Ó¦Öú: 0 (Ó×¶ùÔ°)
- ½ð±Ò: 1317.9
- Ìû×Ó: 198
- ÔÚÏß: 34Сʱ
- ³æºÅ: 649063
- ×¢²á: 2008-11-08
- ÐÔ±ð: GG
- רҵ: ¾ÛºÏÎï¹²»ìÓ븴ºÏ²ÄÁÏ
2Â¥2009-03-31 11:05:47
wgh8781
½ð³æ (СÓÐÃûÆø)
- Ó¦Öú: 0 (Ó×¶ùÔ°)
- ½ð±Ò: 1317.9
- Ìû×Ó: 198
- ÔÚÏß: 34Сʱ
- ³æºÅ: 649063
- ×¢²á: 2008-11-08
- ÐÔ±ð: GG
- רҵ: ¾ÛºÏÎï¹²»ìÓ븴ºÏ²ÄÁÏ
3Â¥2009-03-31 11:08:16
wgh8781
½ð³æ (СÓÐÃûÆø)
- Ó¦Öú: 0 (Ó×¶ùÔ°)
- ½ð±Ò: 1317.9
- Ìû×Ó: 198
- ÔÚÏß: 34Сʱ
- ³æºÅ: 649063
- ×¢²á: 2008-11-08
- ÐÔ±ð: GG
- רҵ: ¾ÛºÏÎï¹²»ìÓ븴ºÏ²ÄÁÏ
4Â¥2009-03-31 11:09:49














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