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yuepeiiccas

Í­³æ (СÓÐÃûÆø)

[½»Á÷] Ó¢ÎÄÇë´ó¼ÒÐÞ¸Ä

1.        The slightly increased crosslink density of H1.4 in adequate to compensate the influence of the reduction in Xc. Thus the influence of Xc predominates.
  H1.4 ÂÔÓÐÔö¼ÓµÄ½»ÁªÃܶȲ»×ãÒÔ²¹³¥½á¾§¶ÈϽµËù´øÀ´µÄÓ°Ïì¡£ËùÒԽᾧ¶ÈµÄÓ°ÏìÆðÖ÷µ¼×÷Óá£
2.        When H is higher than 1.1, degradation rate increases evidently with H.
µ±H¸ßÓÚ1.1ʱ£¬½µ½âËÙÂÊËæ×ÅHÖµÔö´ó¶øÃ÷ÏÔϽµ¡£
3.        Nevertheless, in this system, the crosslink density does not retard degradation since the increase of crosslink density by increasing H is companied with a decrease in Mw and Xc, which may play dominant roles in the degradation.
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4.        while D residue that contains urethane groups degrades more slowly, due to the lack of the susceptible ester bonds.
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5.        Biodegradation rate first decreases with increase of H up to 1.1, then increases with further increase of H.
6.        Wang et al. studied the influence of H on molecular weight of copolymers containing of PBS and poly(L-lactic acid) when R-value is in the narrow range of 0.9 to 1.1 and found that maximum molecular weight was obtained at R-value of 1.0.
7. Therefore, extensive researches on P modification have been focused on the introduction of comonomers and change of the chemical structure by means of copolymerization.
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[ Last edited by yuepeiiccas on 2010-4-1 at 17:31 ]
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zhills

гæ (³õÈëÎÄ̳)

yuepeiiccas(½ð±Ò+2):лл 2010-05-02 13:14
1.        The slightly increased crosslink density of H1.4 cannot adequately compensate the influence of the reduction in Xc. Thus the influence of Xc predominates.
  H1.4 ÂÔÓÐÔö¼ÓµÄ½»ÁªÃܶȲ»×ãÒÔ²¹³¥½á¾§¶ÈϽµËù´øÀ´µÄÓ°Ïì¡£ËùÒԽᾧ¶ÈµÄÓ°ÏìÆðÖ÷µ¼×÷Óá£
2.        When H is higher than 1.1, degradation rate decreases evidently with increase of H.
µ±H¸ßÓÚ1.1ʱ£¬½µ½âËÙÂÊËæ×ÅHÖµÔö´ó¶øÃ÷ÏÔϽµ¡£
3.        Nevertheless, in this system, the crosslink density does not degrade the performance, since the increase of crosslink density accompanies the decrease of Mw and Xc, which play dominant roles in the degradation.
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4.        while D residue that contains urethane groups degrades more slowly, due to the lack of the susceptible ester bonds.
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5.        Biodegradation rate first decreases with increase of H up to 1.1, then increases with further increase of H.
6.        Wang et al. studied the influence of H on molecular weight of copolymers containing of PBS and poly(L-lactic acid) when R-value is in the narrow range of 0.9 to 1.1 and found that maximum molecular weight was obtained at R-value of 1.0.
7. Therefore, extensive researches on P modification have been focused on the introduction of comonomers and the change of the chemical structure by means of copolymerization.
Òò´Ë£¬ºÜ¶à¶ÔP½øÐиÄÐÔµÄÑо¿¼¯ÖÐÓÚͨ¹ý¹²¾ÛÒýÈë¹²¾Ûµ¥Ìå¸Ä±ä»¯Ñ§½á¹¹.
2Â¥2010-04-01 19:08:38
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sammi_deng

½ð³æ (ÕýʽдÊÖ)

yuepeiiccas(½ð±Ò+3):¶àл 2010-05-02 13:12
1.        The slightly increased crosslink density of H1.4 is in adequate to compensate the influence of the reduction in Xc. Thus the influence of Xc has the dominant role to play.
  H1.4 ÂÔÓÐÔö¼ÓµÄ½»ÁªÃܶȲ»×ãÒÔ²¹³¥½á¾§¶ÈϽµËù´øÀ´µÄÓ°Ïì¡£ËùÒԽᾧ¶ÈµÄÓ°ÏìÆðÖ÷µ¼×÷Óá£
2.        When H is higher than 1.1, degradation rate increases dramatically with the increase of H.
µ±H¸ßÓÚ1.1ʱ£¬½µ½âËÙÂÊËæ×ÅHÖµÔö´ó¶øÃ÷ÏÔϽµ¡£
3.        Nevertheless, in this system, the crosslink density does not deviate the degradation since the increase of crosslink density accompanyed by the increasing H and the decrease in Mw and Xc, which may play dominant roles in the degradation.
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4.        However, D residue that contains the urethane groups degrades more slowly, due to the lack of the susceptible ester bonds.
¶øº¬Óо۰±õ¥»ùÍŵÄD²ÐÁô×é·Ö½µ½â½ÏÂý£¬ÕâÊÇÒòΪËûÃÇȱÉÙÒ×Êܹ¥»÷µÄõ¥¼ü¡£
5.        The rate of biodegradation first decreases with the increase of H up to 1.1, then increases with the further increase of H.
6.        Wang et al. studied the influence of H on molecular weight of copolymers containing of PBS and poly(L-lactic acid) when R-value is in the narrow range of 0.9 to 1.1 and found that maximum molecular weight  obtained at R-value of 1.0.
7. Therefore, extensive researches on P modification have been focused on the introduction of comonomers and the change of the chemical structure by means of copolymerization.
Òò´Ë£¬ºÜ¶à¶ÔP½øÐиÄÐÔµÄÑо¿¼¯ÖÐÓÚͨ¹ý¹²¾ÛÒýÈë¹²¾Ûµ¥Ìå¸Ä±ä»¯Ñ§½á¹¹.
3Â¥2010-04-02 11:35:31
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

feynman

Ìú¸Ëľ³æ (ÕýʽдÊÖ)

1..It is not adequate to compensate the influence of the reduction in Xc by slightly increasing crosslink density of H1.4 .As the influence of Xc predominates.
H1.4 ÂÔÓÐÔö¼ÓµÄ½»ÁªÃܶȲ»×ãÒÔ²¹³¥½á¾§¶ÈϽµËù´øÀ´µÄÓ°Ïì¡£ËùÒԽᾧ¶ÈµÄÓ°ÏìÆðÖ÷µ¼×÷Óá£

zhills ¿´µ½ÁË¡®²»×ãÒÔ²¹³¥¡¯£¬Â¥Ö÷·­Òë´íÁË£¬µ«ÊÇzhillsÓÃÁ˸öcannot ¾ÍÓеãÎÊÌâ
4Â¥2010-04-02 13:14:50
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

feynman

Ìú¸Ëľ³æ (ÕýʽдÊÖ)

yuepeiiccas(½ð±Ò+1):л 2010-05-02 13:11
2.  When H is higher than 1.1, degradation rate decreases evidently with the increase of H.
µ±H¸ßÓÚ1.1ʱ£¬½µ½âËÙÂÊËæ×ÅHÖµÔö´ó¶øÃ÷ÏÔϽµ¡£
5Â¥2010-04-02 13:18:54
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

feynman

Ìú¸Ëľ³æ (ÕýʽдÊÖ)

3.  Nevertheless, in the system, the crosslink density does not degrade the performance, because the increase of crosslink density accompanies the decrease of Mw and Xc, which play dominant roles in the degradation.
È»¶ø£¬ÔÚÏÖÔÚÕâ¸öÌåϵÖУ¬½»ÁªÃܶÈûÓÐʹ½µ½âÐÔÄܱä²î£¬ÕâÊÇÒòΪ½»ÁªÃܶÈÔö¼Ó°éËæ×Å·Ö×ÓÁ¿ºÍ½á¾§¶ÈµÄϽµ, ËûÃǶԽµ½âÆð×ÅÖ÷µ¼×÷Óá£

Õâ¸öµØ·½²»ÒªÓÃmay ÂÛÎÄÖкܼɻäÓÃÕâ¸ö´ÊÓï
6Â¥2010-04-02 13:26:19
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feynman

Ìú¸Ëľ³æ (ÕýʽдÊÖ)

4.Due to the lack of the susceptible ester bonds£¬while residue of D which contains urethane groups degrades more slowly.

¶øº¬Óо۰±õ¥»ùÍŵÄD²ÐÁô×é·Ö½µ½â½ÏÂý£¬ÕâÊÇÒòΪËûÃÇȱÉÙÒ×Êܹ¥»÷µÄõ¥¼ü¡£
7Â¥2010-04-02 13:33:31
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

feynman

Ìú¸Ëľ³æ (ÕýʽдÊÖ)

yuepeiiccas(½ð±Ò+1, ·­ÒëEPI+1):лÁË 2010-05-02 13:11
5.Biodegradation rate first decreases with the increasing of H up to 1.1, then increases with the increasing  H.
6. Wang et al. studied the influence of H on molecular weight of copolymers which contains PBS and poly(L-lactic acid), when R-value is in the narrow range of 0.9 to 1.1 and that the maximum molecular weight was obtained at R-value of 1.0.
8Â¥2010-04-02 13:42:57
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

feynman

Ìú¸Ëľ³æ (ÕýʽдÊÖ)

7. Therefore, extensive researches on P modification have been focused on the introduction of comonomers and changing the chemical structure by means of copolymerization.
Òò´Ë£¬ºÜ¶à¶ÔP½øÐиÄÐÔµÄÑо¿¼¯ÖÐÓÚͨ¹ý¹²¾ÛÒýÈë¹²¾Ûµ¥Ìå¸Ä±ä»¯Ñ§½á¹¹.


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