Mixed [2 : 6] hetero-arm star polymers based on Janus POSS with precisely defined arm distribution

One important, yet less explored molecular parameter of star polymers is the distribution of arms in three dimensional (3D) space. Herein, we describe the synthesis of a series of mixed [2 : 6] hetero-arm star polymers whose arms are precisely arranged on a cubic scaffold of T 8 polyhedral oligomeri...

Full description

Saved in:
Bibliographic Details
Published in:Polymer chemistry 2016-01, Vol.7 (13), p.2381-2388
Main Authors: Shao, Yu, Yin, Hang, Wang, Xiao-Man, Han, Shuai-Yuan, Yan, Xuesheng, Xu, Jun, He, Jinlin, Ni, Peihong, Zhang, Wen-Bin
Format: Article
Language:English
Subjects:
Mass spectrometry
Platforms
Polyhedral oligomeric silsesquioxane
Polystyrene resins
Self assembly
Stars
Synthesis
Three dimensional
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:One important, yet less explored molecular parameter of star polymers is the distribution of arms in three dimensional (3D) space. Herein, we describe the synthesis of a series of mixed [2 : 6] hetero-arm star polymers whose arms are precisely arranged on a cubic scaffold of T 8 polyhedral oligomeric silsesquioxane (POSS). The synthesis begins with regio-isomeric Janus POSS compounds ( para -, meta -, and ortho -isomers) with two hydroxylethyl and six vinyl pendant groups. Two poly( -caprolactone) (PCL) chains are grown from the hydroxyls by Sn(Oct) 2 -mediated ring-opening polymerization. The vinyls are then converted to azides for subsequent "grafting" of six polystyrene (PS) arms onto POSS. The configuration of the final star polymers was thoroughly characterized by NMR, FT-IR, SEC, and MALDI-TOF mass spectrometry. This serves as the first few examples of mixed-arm star polymers with precise distribution of multiple arms, providing an intriguing platform for the study of their self-assembly. A series of mixed [2 : 6] hetero-arm star polymers are prepared, whose arms (polystyrene and poly( -caprolactone)) are precisely arranged on a cubic scaffold of T 8 polyhedral oligomeric silsesquioxane (POSS).
ISSN:1759-9954
1759-9962
DOI:10.1039/c6py00241b