Znn3bq.jpeg
²é¿´: 8161  |  »Ø¸´: 8

cuihuapeng

ľ³æ (ÕýʽдÊÖ)

[½»Á÷] ¡¾½»Á÷¡¿¾ÛºÏÎïÖÐPDIÊÇʲôÒâ˼£¨Íê±Ï£© ÒÑÓÐ8È˲ÎÓë

ÇëÎÊ£¬¾ÛºÏÎïÁ£¾¶²âÊÔÊÔÑéÖÐËù˵µÄPDIÊÇʲôÒâ˼°¡£¿£¿

[ Last edited by cuihuapeng on 2010-5-29 at 20:03 ]
»Ø¸´´ËÂ¥
¼ÓÓÍ£¡
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

QLiu2628

Ìú¸Ëľ³æ (ÖøÃûдÊÖ)

PDI:¶à·ÖÉ¢ÐÔÖ¸Êý

¡ï ¡ï ¡ï ¡ï
cuihuapeng(½ð±Ò+2):лл£¡ 2010-05-29 20:01:36
Þ¹Ò²ݶù(½ð±Ò+4):2Â¥½âÊÍ×îÏêϸ£¬Ó¦¸Ã¶à¸øÒ»Ð©~»¶Ó­ÌÖÂÛ~ 2010-05-29 22:06:37
¶à·ÖÉ¢ÐÔÖ¸Êý
wikipedia: In organic chemistry, the polydispersity index (PDI), is a measure of the distribution of molecular mass in a given polymer sample. The PDI calculated is the weight average molecular weight divided by the number average molecular weight. It indicates the distribution of individual molecular masses in a batch of polymers. The PDI has a value equal to or greater than 1, but as the polymer chains approach uniform chain length, the PDI approaches unity (1). For some natural polymers PDI is almost taken as unity. The PDI from polymerization is often denoted as:
PDI=Mw/Mn


Mn is more sensitive to molecules of low molecular mass, while Mw is more sensitive to molecules of high molecular mass.

A polymer material is denoted by the term polydisperse if its chain lengths vary over a wide range of molecular masses. This is characteristic of man-made polymers.[1]. Natural organic matter produced by the decomposition of plants and wood debris in soils (humic substances) has also a pronounced polydispersed character. It is the case of humic acids and fulvic acids, natural polyelectrolyte substances having respectively higher and lower molecular weights.
PSaveatree...pleaseDONOTprintthispageunlessyoureallyneedto.
2Â¥2010-05-29 19:48:56
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

ËÎÇç´¨

Òø³æ (ÕýʽдÊÖ)

cuihuapeng(½ð±Ò+2): 2010-05-29 20:01:49
cuihuapeng(½ð±Ò+1): 2010-05-29 20:02:23
cuihuapeng(½ð±Ò+2):лл£¡ 2010-05-29 20:02:40
·Ö×ÓÁ¿·Ö²¼
3Â¥2010-05-29 19:49:02
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

tlmowen09

ÖÁ×ðľ³æ (ÎÄ̳¾«Ó¢)

cuihuapeng(½ð±Ò+2):лл 2010-05-29 20:02:16
¶à·ÖÉ¢Ö¸Êý°É
4Â¥2010-05-29 19:52:57
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

wpz.219

Ìú¸Ëľ³æ (ÖøÃûдÊÖ)

2Â¥µÄ½âÊͺÜÏêϸ°¡
5Â¥2010-05-29 21:23:01
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

СÂìÒÏ1980

ľ³æ (ÖøÃûдÊÖ)

¾ÍÊÇ·Ö×ÓÁ¿·Ö²¼Ö¸Êý
6Â¥2010-05-29 21:50:17
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

placopolymer

½ð³æ (Ö°Òµ×÷¼Ò)

á·î¸ÉúÎï¾ÛÈéËá¼°¹²¾ÛÎïÑо¿


·Ö×ÓÁ¿·Ö²¼ÏµÊý
7Â¥2010-05-29 22:58:50
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

junergao

½ð³æ (СÓÐÃûÆø)

ÓÞÈË

·Ö×ÓÁ¿·Ö²¼Ö¸Êý
»îµ½ÀÏѧµ½ÀÏ
8Â¥2010-05-29 23:04:53
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

СÀסª¡ª

Í­³æ (³õÈëÎÄ̳)

¡ï
Сľ³æ: ½ð±Ò+0.5, ¸ø¸öºì°ü£¬Ð»Ð»»ØÌû
Polydispersed index£¨PDI£©¶à·ÖÉ¢Ö¸Êý£¬PDI£½Êý¾ùÁ£¾¶/ÖØ¾ùÁ£¾¶£¬µ±È»ÊÇÔ½½Ó½ü1Ô½ºÃ£¬¾ùÒ»ÐÔºÃ
9Â¥2021-10-19 08:12:29
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
Ïà¹Ø°æ¿éÌø×ª ÎÒÒª¶©ÔÄÂ¥Ö÷ cuihuapeng µÄÖ÷Ìâ¸üÐÂ
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¿¼ÑÐ] ²ÄÁÏÀà284µ÷¼Á +37 Ïë»»ÊÖ»ú²»Ïë½âÊ 2026-04-08 45/2250 2026-04-10 20:15 by maohaier
[¿¼ÑÐ] Çóµ÷¼Á +5 ²»»á·ÉµÄÓã@ 2026-04-10 5/250 2026-04-10 19:07 by chemisry
[¿¼ÑÐ] ²ÄÁÏÓ뻯¹¤300Çóµ÷¼Á +34 Ф¿ªÎÄ 2026-04-09 37/1850 2026-04-10 18:58 by HPUCZ
[¿¼ÑÐ] Ò»Ö¾Ô¸211£¬»¯Ñ§Ñ§Ë¶£¬310·Ö£¬±¾¿ÆÖصãË«·Ç£¬Çóµ÷¼Á +27 ŬÁ¦·Ü¶·112 2026-04-07 30/1500 2026-04-10 15:06 by Kilig0317
[¿¼ÑÐ] 282£¬µçÆø¹¤³Ìרҵ£¬Çóµ÷¼Á£¬²»Ìôרҵ +9 jggshjkkm 2026-04-10 9/450 2026-04-10 14:55 by ÄæË®³Ë·ç
[¿¼ÑÐ] »¯Ñ§¹¤³Ìµ÷¼Á289 +42 yangæÃ 2026-04-07 48/2400 2026-04-10 09:34 by 690616278
[¿¼ÑÐ] 085600²ÄÁÏÓ뻯¹¤×¨Ë¶329 Çóµ÷¼Á +24 ¶îcc 2026-04-06 25/1250 2026-04-09 16:01 by wp06
[¿¼ÑÐ] »¯Ñ§¹¤³ÌÓë¼¼Êõרҵһ־Ը¹þ¹¤³Ì 291·ÖBÇø ¹ú¼Ò¼¶´ó´´¸ºÔðÈË ÓÐÒ»×÷ÂÛÎÄ +13 Emmy~ 2026-04-09 13/650 2026-04-09 14:47 by onlyÖÜ
[¿¼ÑÐ] 0860004 Çóµ÷¼Á 309·Ö +6 Yin DY 2026-04-09 6/300 2026-04-09 10:19 by °¡Àî999
[¿¼ÑÐ] 0703×Ü·Ö331Çóµ÷¼Á +18 ZY-05 2026-04-04 22/1100 2026-04-09 09:09 by ŶŶ123
[¿¼ÑÐ] 0703»¯Ñ§µ÷¼Á 348·Ö +14 °¦ÎÒ³¬ÕæÃ»ÕÐÁË 2026-04-06 15/750 2026-04-08 19:16 by ÎÒ¼õ·Ê1
[¿¼ÑÐ] ÇóÖú +3 ¿¨¿¨¶«88 2026-04-06 4/200 2026-04-06 15:28 by going home
[¿¼ÑÐ] 085405Èí¼þ¹¤³Ì301·ÖÇóµ÷¼Á£¬×¨Ë¶¿É¿çרҵ£¬ËÄÁù¼¶Òѹý +3 ¾²¾²ÏëÏë 2026-04-05 3/150 2026-04-06 15:23 by nepu_uu
[¿¼ÑÐ] 0817»¯Ñ§¹¤³ÌÓë¼¼ÊõÇóµ÷¼Á£¬Ò»Ö¾Ô¸Öк£Ñó319 +14 lv945 2026-04-04 14/700 2026-04-06 10:20 by À¶ÔÆË¼Óê
[¿¼ÑÐ] ²ÄÁÏר˶322·Ö +10 ¹þ¹þ¹þºðºðºð¹þ 2026-04-04 10/500 2026-04-05 21:22 by ѧԱ8dgXkO
[¿¼ÑÐ] 277Çóµ÷¼Á +5 ¿¼Ñе÷¼Álxh 2026-04-05 5/250 2026-04-05 19:03 by chy09050039
[¿¼ÑÐ] ¿¼Ñе÷¼Á +3 mcbbc 2026-04-04 3/150 2026-04-05 10:03 by barlinike
[¿¼ÑÐ] ²ÄÁϵ÷¼Á +9 ¸ï΢¹ð 2026-04-04 9/450 2026-04-05 08:27 by 544594351
[¿¼ÑÐ] ÔõôɾÌû×Ó°¡ +3 ·ìêØ1000 2026-04-04 3/150 2026-04-04 14:20 by ÍÁľ˶ʿÕÐÉú
[¿¼ÑÐ] 400·ÖÇóµ÷¼Á +3 ÞÏÞÎÇÒÄÓÍ· 2026-04-04 3/150 2026-04-04 08:41 by jp9609
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û