Monomer addition programs to generate constant gradient block copolymers

被引：10

作者：

Beginn, Uwe ^{[1
]}

机构：

[1] Rhein Westfal TH Aachen, DWI ITMC TexMC, D-52056 Aachen, Germany

来源：

POLYMER | 2006年 / 47卷 / 19期

关键词：

gradient copolymers; gradient block copolymers; monomer addition programs; CONTROLLED RADICAL POLYMERIZATION; MOLECULAR BRUSHES; SEMIBATCH; CHAIN; BATCH;

D O I：

10.1016/j.polymer.2006.07.035

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Equations are derived to calculate the monomer addition programs for semi-batch copolymerization reactions that allow to prepare gradient copolymers and block gradient copolymers containing arbitrary, pre-defined compositional gradients along the polymer chain. An analytical solution is given for the special case of ideal random copolymerizations, and numerical calculations are applied to discuss non-ideal situations. Three classes of addition programs are proposed and discussed with respect to time efficiency. Time-linear addition programs are shown to be insufficient to generate perfectly constant gradients over the whole compositional regions. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：6880 / 6894

页数：15

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