Single-chain crosslinked polymers via the transesterification of folded polymers: from efficient synthesis to crystallinity control,Polymer Chemistry

当前位置： X-MOL 学术 › Polym. Chem. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Single-chain crosslinked polymers via the transesterification of folded polymers: from efficient synthesis to crystallinity control
Polymer Chemistry ( IF 4.1 ) Pub Date : 2020-07-07 , DOI: 10.1039/d0py00758g
Daiki Ito _{1,

2,

3,

4,

5} , Yoshihiko Kimura _{1,

2,

3,

4,

5} , Mikihito Takenaka _{3,

5,

6,

7,

8} , Makoto Ouchi _{1,

2,

3,

4,

5} , Takaya Terashima _{1,

2,

3,

4,

5}

Affiliation

Herein we report efficient synthetic systems of single-chain crosslinked polymers via the intramolecular transesterification of folded random copolymers in organic media and the unique crystallization behavior of their crosslinked polymers. For this purpose, we designed random terpolymers comprising octadecyl methacrylate (ODMA), 2-hydroxyethyl methacrylate, and methyl acrylate (MA). The copolymers self-folded in octane via the association of the hydroxyl groups to form reverse micelles; the micelles were intramolecularly crosslinked by scandium-mediated transesterification of the MA units with the hydroxyl groups to give polymer nanoparticles bearing multiple octadecyl groups. This system affords efficient synthesis of various single-chain crosslinked polymers with controlled molecular weight at a relatively high concentration of up to 50 mg mL⁻¹. Additionally, the crystallinity of these ODMA-based copolymers can be controlled by the crosslinking degree; the crystallinity and melting temperatures of the octadecyl groups gradually decreased as the intramolecular crosslinking of the copolymers proceeded. Thus, controlling the intramolecular crosslinking of polymers is one possibility to tune the crystallinity of polymer materials.

中文翻译：

单链交联聚合物通过折叠聚合物的酯交换反应：从有效合成到结晶度控制

本文中，我们通过有机介质中折叠无规共聚物的分子内酯交换反应及其交联聚合物的独特结晶行为，报告了单链交联聚合物的高效合成系统。为此，我们设计了包含甲基丙烯酸十八烷基酯（ODMA），甲基丙烯酸2-羟乙酯和丙烯酸甲酯（MA）的无规三元共聚物。共聚物通过辛烷自折叠羟基的缔合形成反胶束；通过scan介导的MA单元与羟基的酯交换，使胶束分子内交联，得到带有多个十八烷基的聚合物纳米粒子。该系统可在高达50 mg mL ^-1的相对较高浓度下有效合成具有受控分子量的各种单链交联聚合物。另外，这些基于ODMA的共聚物的结晶度可以通过交联度来控制。随着共聚物的分子内交联的进行，十八烷基的结晶度和熔融温度逐渐降低。因此，控制聚合物的分子内交联是调节聚合物材料的结晶度的一种可能性。

更新日期：2020-08-18

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11