| ²é¿´: 378 | »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»¶
Ò»Ö¾Ô¸´óÁ¬Àí¹¤´óѧ²ÄÁÏÇóµ÷¼Á
ÒѾÓÐ5È˻ظ´
²ÄÁÏÓ뻯¹¤µ÷¼ÁÒ»Ö¾Ô¸´óÁ¬º£ÊÂ085600£¬349
ÒѾÓÐ6È˻ظ´
Ò»Ö¾Ô¸Öк£Ñó320»¯Ñ§¹¤³ÌÓë¼¼Êõѧ˶Çóµ÷¼Á
ÒѾÓÐ4È˻ظ´
²ÄÁÏ¿ÆÑ§Ó빤³Ìµ÷¼Á
ÒѾÓÐ11È˻ظ´
311Çóµ÷¼ÁÒ»Ö¾Ô¸ºÏ·Ê¹¤Òµ´óѧ
ÒѾÓÐ4È˻ظ´
һ־ԸʳƷ¿ÆÑ§Ó빤³Ì083200Çóµ÷¼Á
ÒѾÓÐ4È˻ظ´
²ÄÁÏ¿ÆÑ§Ó빤³ÌÇóµ÷¼Á
ÒѾÓÐ10È˻ظ´
Ò»Ö¾Ô¸±±»¯085600²ÄÁÏר˶275|ÓÐÎÄÕÂרÀû£üÇóµ÷¼Á
ÒѾÓÐ11È˻ظ´
Ò»Ö¾Ô¸ ÄϾ©º½¿Õº½Ìì´óѧ £¬080500²ÄÁÏ¿ÆÑ§Ó빤³Ìѧ˶
ÒѾÓÐ4È˻ظ´
085600²ÄÁÏÓ뻯¹¤µ÷¼Á
ÒѾÓÐ15È˻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¥
10