24小时热门版块排行榜

返回列表

当前主题已经存档。

当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖

machunbao0306

木虫 (小有名气)

应助: 0 (幼儿园)
金币: 2208.8
散金: 7
红花: 1
帖子: 163
在线: 44.8小时
虫号: 159633
注册: 2006-01-07
专业: 高分子材料

[交流] 苯乙烯与丙烯酸十六醇酯共聚合的竞聚率

我最近在做苯乙烯和丙烯酸高碳酯的共聚合，可是查了很多东西也找不到两者的竞聚率，哪位达人知道啊？赐教一下吧！！！
多谢了，急等！！！

[ Last edited by machunbao0306 on 2009-2-27 at 13:31 ]

回复此楼

» 猜你喜欢

1楼 2007-07-25 17:38:07

已阅回复此楼关注TA 给TA发消息送TA红花 TA的回帖

walter1977

铜虫 (正式写手)

应助: 0 (幼儿园)
金币: 143.2
散金: 5
红花: 2
帖子: 358
在线: 99.7小时
虫号: 48481
注册: 2004-06-19
性别: MM
专业: 高分子合成化学

sorry,我没哟看清楚

Journal of Polymer Science Part A-1: Polymer Chemistry， Volume 8, Issue 11 , Pages 3113 - 3121
Reactivity ratios and copolymerization parameters for copolymers incorporating n-octadecyl acrylate and N-n-octadecylacrylamide

Article
Reactivity ratios and copolymerization parameters for copolymers incorporating n-octadecyl acrylate and N-n-octadecylacrylamide
Edmund F. Jordan Jr., Richard Bennett, Andrea C. Shuman, A. N. Wrigley
Eastern Utilization Research and Development Division, Agricultural Research Service, U.S. Department of Agriculture, Philadelphia, Pennsylvania 19118

Abstract
Monomer reactivity ratios and copolymerization parameters were determined for n-octadecyl acrylate and N-n-octadecylacrylamide with several monomers not previously reported. Values of Q and e for the long-chain acrylate now agreed more closely than before with the average of values for the lower acrylate homologs. The average polarity parameter for N-n-octadecylacrylamide still showed more electron withdrawal from the double bond (e = 0.42) than was expressed by the average literature value (e = -0.10) for N-n-octylacrylamide. Because penultimate effects were absent in this work, the reason for the discrepancy seems to reside in the copolymer analysis. Reactivity ratios for oleyl and octadecyl acrylate with methyl methacrylate were similar. Coefficients for the relation between overall rates of copolymerization and composition were obtained on some systems by curve fitting with a computer. They generally showed a slight minimum.

同时也参考octadecyl acrylate：
from Polymer handbook, 4th Edition, Page II/251
Monomer 1 Monomer2 rx ±95% r2 ±95%
Styrene, Acrylate, octadecyl 0.777  0.37
Styrene, Acrylate, octadecyl 0.44 0.18
Styrene,  Acrylate, octadecyl 0.79 0.31
Styrene,  Acrylate, octadecyl 0.44 0.18
可以看出，可以很好的共聚．

[ Last edited by walter1977 on 2007-7-26 at 17:23 ]