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jacy_cheyn
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mlnjut(½ð±Ò+30, ·ÒëEPI+1): ºÜºÃµÄŶ¡£¡£Ð»Ð»£¬ÄãµÄÍ·ÏñºÜƯÁÁ¡£¡£ 2011-05-27 20:30:38
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ǰÁ½¾äÎÒÈÏΪ²»Ç¡µ±µÄµØ·½ÒѾ¸ÄÁË~¡£ºÇºÇ¡£¾ÍÊÇÌùÉÏÈ¥µÄ¡£ µÚÈý¾ÖºÍµÚËľÖʵÔÚÊÇ¿´×ÅÓеã·Ö²»×ÅÍ·ÄÔ¡£ ¡°¶ÔÓÚHEC£¬ÔÚHECÓÃÁ¿Îª5g¡¢ÃÑ»¯¼ÁÓÃÁ¿Îª7.5g¡¢¼îÓÃÁ¿1.85g¡¢ÔÚ65¡æÏ·´Ó¦2Сʱ£¬µÃµ½µÄQHECÈ¡´ú¶È×îÓÅΪ0.61£¬·´Ó¦Ð§ÂÊΪ64%£»¸ÄΪ£º HEC, etherification agent and alkali were added in to the reaction with the amounts of which were 5g, 7.5g and 1.85g respectively. The reaction will last 2 hours at the temperature of 65 ¡æ, and the optimal degree of substitution will be up to 0.61 with the reaction efficiency of 64%. ÏÂÒ»¾äÄãÓ¦¸Ã¿ÉÒÔÁ˰É~£¬Ò²ÐíÎÒдµÄÒ²²»¶à£¬Ï໥½»Á÷°É~£¬O(¡É_¡É)O~ |
9Â¥2011-05-27 20:23:22
ССɵ¹Ï
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Mally89: ¹û¶ÏÒªµ¶¨°¡~~~~~~ 2011-05-27 19:40:54
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2Â¥2011-05-27 16:21:47
jacy_cheyn
Ìú¸Ëľ³æ (ÖªÃû×÷¼Ò)
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Mally89(½ð±Ò+1): ¸ÐлӦÖú£¡~»¶Ó³£À´£¡~ 2011-05-27 19:41:15
Mally89(½ð±Ò+1): ¸ÐлӦÖú£¡~»¶Ó³£À´£¡~ 2011-05-27 19:41:15
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PVA and HEC are water-soluble. We used 3-chloro-2-hydroxypropyl trimethyl ammonium chloride as etherifying agent to introduce quaternary ammonium groups into the structure of PVA and HEC through quaternization reaction to prouduce quaternized QPVA and QHEC, respectively. The effect of reaction conditions on the degree of substitution and reaction efficiency were studied. For HEC, the HEC dosage of 5g, etherification agent is 7.5g, alkali 1.85g, at 65 ¡æ for 2 hours, the optimal degree of substitution obtained QHEC 0.61, the reaction efficiency was 64%.(Õâ¾ä»°Ã»ÓÐνÓºÃºÃ¸Ä¸Ä~ for the PVA, the PVA concentration of 5%, etherification agent is 7g, alkali 2.5g, at 65 ¡æ for 6 hours, get QPVA optimal degree of substitution 3.95. £¨Í¬ÉÏ£© |
3Â¥2011-05-27 16:22:46
mlnjut
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4Â¥2011-05-27 16:28:40













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