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The values are relatively high when compared with the B-a/epoxy thermoset, which possesses 5% degradation temperature at 302-309, dependent on the curing catalyst [32].


Unlike the curing of neat ( 6) (Fig. 2), the characteristic peaks of oxazine did not disappear completely in the ( 6)/DCPDE system after curing at 220 C for 20 min, suggesting a slower curing rate.


The carbonyl signal, which was not seen after 140 C treatment, supports the formation of cyclic amide.


In contrast to the good solubility of ( 6), preparing benzoxazine ( 7) in chloroform (Run 8) and toluene/ethanol (Runs 9e10) results in powder precipitate (not gelation) after 1 h due to the poor solubility of ( 7), which limits the purity of ( 7).
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ÖìÑÒ0308: ½ð±Ò+8, ·­ÒëEPI+1, ¡ï¡ï¡ï¡ï¡ï×î¼Ñ´ð°¸ 2015-03-06 10:06:51
The values are relatively high when compared with the B-a/epoxy thermoset, which possesses 5% degradation temperature at 302-309, dependent on the curing catalyst [32].
ÓëB-a/»·ÑõÈÈÄýÎïÏà±È£¬ÕâЩÊýÖµÏà¶Ô½Ï¸ß¡£ Ôڹ̻¯´Ù½ø¼ÁµÄ×÷ÓÃÏ£¬B-a/»·ÑõÈÈÄýÎïÔÚ302-309¶ÈµÄζÈÇø¼ä£¬·¢Éú5%µÄÈȽµ½â¡£

Unlike the curing of neat ( 6) (Fig. 2), the characteristic peaks of oxazine did not disappear completely in the ( 6)/DCPDE system after curing at 220 C for 20 min, suggesting a slower curing rate.
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The carbonyl signal, which was not seen after 140 C treatment, supports the formation of cyclic amide.
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In contrast to the good solubility of ( 6), preparing benzoxazine ( 7) in chloroform (Run 8) and toluene/ethanol (Runs 9e10) results in powder precipitate (not gelation) after 1 h due to the poor solubility of ( 7), which limits the purity of ( 7).
Ó루6£©Á¼ºÃµÄÈܽâ¶ÈÐγɶԱȵÄÊÇ£¬ ÔÚÂȷ£¨Run 8£©ºÍ¼×±½/ÒÒ´¼£¨Runs 9e10)ÖУ¬ÖƱ¸±½²¢¶ñຣ¬»áÔÚ1Сʱºó£¬ ÓÉÓÚ£¨7£©µÄÈܽâ¶È½Ï²î£¬²úÉú·ÛÄ©³ÁµíÎ·Ç½ºÄý̬£©£¬ÕâÖÆÔ¼ÁË£¨7£©´¿¶ÈµÄÌáÉý¡£
2Â¥2015-03-06 09:51:52
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2Â¥: Originally posted by Î人һÐÄÒ»Òë at 2015-03-06 09:51:52
The values are relatively high when compared with the B-a/epoxy thermoset, which possesses 5% degradation temperature at 302-309, dependent on the curing catalyst .
ÓëB-a/»·ÑõÈÈÄýÎïÏà±È£¬ÕâЩÊýÖµÏà ...

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