±±¾©Ê¯ÓÍ»¯¹¤Ñ§Ôº2026ÄêÑо¿ÉúÕÐÉú½ÓÊÕµ÷¼Á¹«¸æ
²é¿´: 1223  |  »Ø¸´: 3

ºú³ÌÒ«

Ìú¸Ëľ³æ (ÖøÃûдÊÖ)

[ÇóÖú] »·ÑõÊ÷Ö¬ºÍ´ó·Ö×ÓÁ¿¾ÛÃѰ·Ö®¼äµÄ·´Ó¦£¬ÐèÒª´ß»¯¼ÁÂ𣿠ÒÑÓÐ1È˲ÎÓë

¾ÛÃѰ·D4000Ϊ½üÄ©¶Ëº¬°·»ùµÄ³¤Á´¶þ°·£¬°´ÕÕ2015µÄһƪMacromolecules £¨2015, 48, 7495−7502£©µÄÎÄÕ£¬Óë»·ÑõÊ÷Ö¬ÔÚ80¶È·´Ó¦£¬ËûÃÇÊÇÓõĽüºìÍâ¹âÆ×¼ì²â¹Ì»¯¹ý³Ì£¬·¢ÏÖÔÚ20¸öСʱ¹Ì»¯¶ÈΪ70%£¬µ«ÊÇÎÒÃÇÒ»ÑùµÄÌõ¼þ£¬Ö±½Ó½«»·ÑõÊ÷Ö¬ºÍ¾ÛÃѰ·D4000¹²»ì·´Ó¦£¬µ«ÊÇÔÚ80¶È·´Ó¦24¸öСʱ£¬»¹ÊÇÑÕÉ«²»Ôõô±ä£¬ÓÃÖÐÔ¶ºìÍâ¼ì²â£¬·¢ÏÖ»·ÑõÊ÷Ö¬»ùÍű仯²»´ó£¬Çë¸ßÊִͽ̣¬ÊÇ·ñÐèÒª¼Ó´ß»¯¼Á£¬¼Óʲô´ß»¯¼Á£¬¼Ó¶àÉÙÄØ£¿
ÎÄÏ×Ô­»°£º
PRS was produced by adding/mixing stoichiometric blends of PPODA£¨Jeffamine D-4000£© and DGEBA at 80 ¡ãC. The chemical conversion of these
mixtures was monitored using a Nexus 870 FTIR spectrometer (Thermo Nicolet Corp.) in the near-IR region. Figure 2a shows representative FTIR spectra taken over a period of time for this reaction. The peak at 4530 cm−1 corresponds to the stretching and bending of oxirane bands, and the peak at 4930 cm−1 corresponds to the NH2 combination bands.19,20 The decrease of epoxy and amine concentrations signifies the presence of epoxy−amine reactions. Figure 2b shows the fractional conversion of epoxy with respect to time obtained using the epoxy peak area. Additionally, the approximate gel point was measured using a steady shear viscosity measurement during curing reactions using a TA rheometer apparatus AR2000. Gelation is known to happen at the point where steady shear viscosity rises rapidly
to infinity.21 A combined viscosity−conversion measurement on DGEBA−PPODA systems at 80 ¡ãC showed that the approximate gel point for these systems is taking place at around 84% oxirane conversion.
»Ø¸´´ËÂ¥

» ²ÂÄãϲ»¶

» ±¾Ö÷ÌâÏà¹ØÉ̼ÒÍÆ¼ö: (ÎÒÒ²ÒªÔÚÕâÀïÍÆ¹ã)

ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

dedaji

Ìú¸Ëľ³æ (ÖøÃûдÊÖ)

ÇһÉú×öÍêÒ»³¡ÃÎ

80¡æÒªÊDz»ÐоÍÖ±½Ó100¡æ°É£¬ÒªÊÇÓô߻¯¼Á£¬Ò»°ã»áÓÃDMP-30£¬µ«ÊÇÕâ¸ö»á·¢»Æ£¬ÓÃN ¡²¡³AEP

·¢×ÔСľ³æAndroid¿Í»§¶Ë
¡­¡­¡­¡­¡­¡­¡­¡­²×º£ºúÑî¡­¡­¡­¡­¡­¡­
2Â¥2016-12-04 11:04:11
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

zj34331197

ľ³æ (ÕýʽдÊÖ)

ľ³æ

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï
ºú³ÌÒ«: ½ð±Ò+5, ¡ïÓаïÖú 2017-03-03 14:15:59
ºú³ÌÒ«: ½ð±Ò+5, ¡ïÓаïÖú 2017-03-03 14:16:38
»·ÑõÊ÷Ö¬ÊÇÄÇÖÖÐͺÅÄØ¡£¾ÛÃѰ·ºÍ»·Ñõ»ùÍÅÔÚ80¡æÊÇ¿ÉÒÔ·´Ó¦µÄ¡£
·ÂþÂþÆäÐÞÔ¶Ùâ
3Â¥2016-12-08 10:46:39
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

zj34331197

ľ³æ (ÕýʽдÊÖ)

ľ³æ

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¡ï ¡ï ¡ï ¡ï ¡ï
ºú³ÌÒ«: ½ð±Ò+5, ¡ïÓаïÖú 2017-03-03 14:15:52
Äã¿ÉÒÔÓÃDSC²âÊÔÏÂÆðʼ¹Ì»¯·´Ó¦µÄζȣ¬¸ù¾ÝDSC²âÊÔ½á¹ûÖÆ¶©¹Ì»¯¹¤ÒÕ¡£
·ÂþÂþÆäÐÞÔ¶Ùâ
4Â¥2016-12-08 10:47:18
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
Ïà¹Ø°æ¿éÌø×ª ÎÒÒª¶©ÔÄÂ¥Ö÷ ºú³ÌÒ« µÄÖ÷Ìâ¸üÐÂ
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[Óлú½»Á÷] ¼×»ùÑǻǻÇËáÄÆºÍ¼×»ù»ÇËáõ¥·´Ó¦»úÀí 10+3 kaobao456 2026-03-29 4/200 2026-03-30 23:16 by nBuï®
[¿¼ÑÐ] 317Çóµ÷¼Á +8 Ê®ÏÐwx 2026-03-24 8/400 2026-03-30 21:00 by peike
[¿¼ÑÐ] 286·Öµ÷¼Á +10 Faune 2026-03-30 11/550 2026-03-30 20:35 by °¡Àî999
[¿¼ÑÐ] 332Çóµ÷¼Á +14 032500 2026-03-25 14/700 2026-03-30 20:03 by Î޼ʵIJÝÔ­
[¿¼ÑÐ] 295²ÄÁϹ¤³Ìר˶Çóµ÷¼Á +10 1428151015 2026-03-27 10/500 2026-03-30 19:00 by Ô´_2020
[¿¼ÑÐ] 291Çóµ÷¼Á +8 HanBeiNingZC 2026-03-24 8/400 2026-03-30 17:01 by Î޼ʵIJÝÔ­
[¿¼ÑÐ] 324Çóµ÷¼Á +9 hanamiko 2026-03-26 11/550 2026-03-30 14:27 by JourneyLucky
[¿¼ÑÐ] 070300»¯Ñ§354Çóµ÷¼Á +7 101´ÎÏ£Íû 2026-03-28 7/350 2026-03-30 13:22 by Iveryant
[¿¼ÑÐ] Çó»¯Ñ§µ÷¼Á +11 wulanna 2026-03-28 11/550 2026-03-30 10:59 by ̽123
[¿¼ÑÐ] Çóµ÷¼Á£¬Ò»Ö¾Ô¸ ÄϾ©º½¿Õº½Ìì´óѧ´óѧ £¬080500²ÄÁÏ¿ÆÑ§Ó빤³Ìѧ˶ +6 @taotao 2026-03-26 7/350 2026-03-30 10:43 by ÎÒÊÇС¿µ
[¿¼ÑÐ] Ò»Ö¾Ô¸ÏÃÃÅ´óѧ»¯Ñ§Ñ§Ë¶307Çóµ÷¼Á +10 y7czhao 2026-03-26 10/500 2026-03-28 14:23 by ÌÆãå¶ù
[¿¼ÑÐ] 322Çóµ÷¼Á +5 ¾É… 2026-03-24 5/250 2026-03-28 13:26 by Iveryant
[¿¼ÑÐ] 266·Ö£¬Çó²ÄÁÏÒ±½ðÄÜÔ´»¯¹¤µÈµ÷¼Á +7 ÍÛºôºßºôºß 2026-03-27 9/450 2026-03-28 12:22 by zllcz
[¿¼ÑÐ] 286Çóµ÷¼Á +4 ¶ªµôÀÁ¶è 2026-03-27 7/350 2026-03-28 08:07 by baoball
[¿¼ÑÐ] ÕÅ·¼Ãú-Öйúũҵ´óѧ-»·¾³¹¤³Ìר˶-298 +4 ÊÖ»úÓû§ 2026-03-26 4/200 2026-03-28 07:17 by mmm just
[¿¼ÑÐ] 292Çóµ÷¼Á +4 ÇóÇóÁËÊÕÏÂÎÒ°É£ 2026-03-26 4/200 2026-03-27 10:37 by zhshch
[¿¼ÑÐ] 336²ÄÁÏÇóµ÷¼Á +7 ³ÂäÞÓ¨ 2026-03-26 9/450 2026-03-27 00:20 by wxiongid
[¿¼ÑÐ] »·¾³×¨Ë¶324·ÖÇóµ÷¼ÁÍÆ¼ö +5 ÐùСÄþ¡ª¡ª 2026-03-26 5/250 2026-03-26 12:05 by i_cooler
[¿¼ÑÐ] 303Çóµ÷¼Á +6 À¶É½Ô 2026-03-25 6/300 2026-03-25 22:47 by 418490947
[¿¼ÑÐ] ¡¾2026¿¼Ñе÷¼Á¡¿ÖÆÒ©¹¤³Ì 284·Ö ÇóÏà¹Ø×¨Òµµ÷¼ÁÃû¶î +4 Ô¬Û¼Û¼ 2026-03-25 8/400 2026-03-25 14:32 by lbsjt
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û