| ²é¿´: 377 | »Ø¸´: 3 | |||
| µ±Ç°Ö÷ÌâÒѾ´æµµ¡£ | |||
[½»Á÷]
¡¾ÇóÖú¡¿ How to answer these questions about polymer
|
|||
|
1. The glass transition, Tg, for poly(ethylene) is well below 0, yet a dishpan made from poly(ethylene) retains its shape at temperatures well above 0. 2. Radical polymerization of methyl acrylate carried out in tetrahedronfuran solution generates polymer of relatively low molecular weight. 3. Whether the polymerization of an unknown monomer proceeds by a step-growth or chain-growth process can be determined experimentally. How would this be done [ Last edited by wizardfox on 2009-2-19 at 12:45 ] |
» ²ÂÄãϲ»¶
²ÄÁÏרҵÉ격
ÒѾÓÐ3È˻ظ´
307Çóµ÷¼Á
ÒѾÓÐ20È˻ظ´
285Çóµ÷¼Á
ÒѾÓÐ8È˻ظ´
²ÄÁÏÓ뻯¹¤£¨0856£©304ÇóBÇøµ÷¼Á
ÒѾÓÐ8È˻ظ´
370Çóµ÷¼Á
ÒѾÓÐ3È˻ظ´
070300»¯Ñ§279Çóµ÷¼Á
ÒѾÓÐ5È˻ظ´
¸£½¨Àí¹¤´óѧ²ÄÁÏѧԺÏȽøºÏ½ðÍŶÓÕÐÊÕ¿¼Ñе÷¼ÁѧÉú
ÒѾÓÐ4È˻ظ´
Ó¢Ò»ÊýÒ»408£¬×Ü·Ö284£¬¶þÕ½Õæ³ÏÇóµ÷¼Á
ÒѾÓÐ5È˻ظ´
083000»·¾³¿ÆÑ§Ó빤³Ìµ÷¼Á£¬×Ü·Ö281
ÒѾÓÐ4È˻ظ´
Çóµ÷¼Á
ÒѾÓÐ3È˻ظ´
joli
Ìú¸Ëľ³æ (Ö°Òµ×÷¼Ò)
joli-beautiful
- Ó¦Öú: 134 (¸ßÖÐÉú)
- ¹ó±ö: 0.4
- ½ð±Ò: 7353.6
- É¢½ð: 901
- ºì»¨: 51
- Ìû×Ó: 3406
- ÔÚÏß: 777.7Сʱ
- ³æºÅ: 361143
- ×¢²á: 2007-05-03
- רҵ: ¸ß·Ö×Ó²ÄÁϵļӹ¤Óë³ÉÐÍ

2Â¥2009-02-19 12:26:30
zczc6
Òø³æ (СÓÐÃûÆø)
- Ó¦Öú: 1 (Ó×¶ùÔ°)
- ½ð±Ò: 1.1
- Ìû×Ó: 222
- ÔÚÏß: 30.4Сʱ
- ³æºÅ: 441492
- ×¢²á: 2007-10-27
- ÐÔ±ð: GG
- רҵ: ¾ÛºÏÎï¹²»ìÓ븴ºÏ²ÄÁÏ
3Â¥2009-02-19 23:38:09
taianxt
½ð³æ (ÖøÃûдÊÖ)
- Ó¦Öú: 2 (Ó×¶ùÔ°)
- ½ð±Ò: 74
- É¢½ð: 20
- ºì»¨: 5
- Ìû×Ó: 1029
- ÔÚÏß: 157Сʱ
- ³æºÅ: 391362
- ×¢²á: 2007-06-03
- ÐÔ±ð: GG
- רҵ: ¸ß·Ö×Ӻϳɻ¯Ñ§
4Â¥2009-02-20 11:44:39














»Ø¸´´ËÂ¥