Star Block Copolymers Through Nitroxide-Mediated Radical Polymerization From Polyhedral Oligomeric Silsesquioxane (POSS) Core

2010 ◽  
Vol 211 (12) ◽  
pp. 1339-1347 ◽  
Author(s):  
Chu-Hua Lu ◽  
Jui-Hsu Wang ◽  
Feng-Chih Chang ◽  
Shiao-Wei Kuo
Keyword(s):  
Block Copolymers ◽  
Radical Polymerization ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Star Block Copolymers ◽  
Oligomeric Silsesquioxane

scholarly journals Main Chain–Type Block Copolymers through Atom Transfer Radical Polymerization from Double-Decker–Shaped Polyhedral Oligomeric Silsesquioxane Hybrids

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 465 ◽  
Author(s):  
Wei-Cheng Chen ◽  
Yu-Hsuan Tsao ◽  
Chih-Feng Wang ◽  
Chih-Feng Huang ◽  
Lizong Dai ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Diblock Copolymer ◽  
Main Chain ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Double Decker ◽  
Copolymer Poly ◽  
Oligomeric Silsesquioxane ◽  
Chain Type

In this study, we synthesized two main chain–type block copolymers featuring hydrogen bond donor and acceptor segments through atom transfer radical polymerization (ATRP) using a bifunctionalized polyhedral oligomeric silsesquioxane (POSS) nanoparticle as the initiator. Hydrosilylation of vinylbenzyl chloride at the two corners of a double-decker silsesquioxane (DDSQ) provided the bifunctionalized benzyl chloride initiator VBC-DDSQ-VBC, which we applied as a platform to prepare a main chain–type polystyrene homopolymer (PS-DDSQ-PS), the diblock copolymer poly(styrene–b–4-vinylpyridine) (P4VP-b-PS-DDSQ-PS-b-P4VP), and the diblock copolymer poly(styrene–b–tert-butoxystyrene) (PtBuOS-b-PS-DDSQ-PS-b-PtBuOS) through sequential ATRP. Selective hydrolysis of the tert-butoxyl units of PtBuOS-b-PS-DDSQ-PS-b-PtBuOS yielded the strongly hydrogen bonding diblock copolymer poly (styrene-b-vinylphenol) (PVPh-b-PS-DDSQ-PS-b-PVPh). We used Fourier transfer infrared spectroscopy, nuclear magnetic resonance spectroscopy, size exclusion chromatography, differential scanning calorimetry, mass-analyzed laser desorption ionization mass spectrometry, and transmission electron microscopy to investigate the chemical structures, thermal behavior, and self-assembled nanostructures formed by these main chain–type block copolymers based on DDSQ.

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