Synthesis of Surface-Initiated Stimuli-Responsive Diblock Copolymer Brushes Utilizing a Combination of ATRP and RAFT Polymerization Techniques

2008 ◽  
Vol 41 (12) ◽  
pp. 4147-4157 ◽  
Author(s):  
Misty D. Rowe ◽  
Brenton A. G. Hammer ◽  
Stephen G. Boyes
Keyword(s):  
Diblock Copolymer ◽  
Raft Polymerization ◽  
Stimuli Responsive ◽  
Copolymer Brushes

Surface Rearrangement of Diblock Copolymer Brushes—Stimuli Responsive Films

2006 ◽  
pp. 125-147 ◽  
Author(s):  
William J. Brittain ◽  
Stephen G. Boyes ◽  
Anthony M. Granville ◽  
Marina Baum ◽  
Brian K. Mirous ◽  
...  
Keyword(s):  
Diblock Copolymer ◽  
Stimuli Responsive ◽  
Copolymer Brushes

Multi-Stimuli-Responsive Mesoporous Membranes and Effect of Molecular Architecture on Thermo- and pH-Responsive Behavior of the grafted Block Copolymer brushes

2019 ◽  
Author(s):  
Yanchun Tang ◽  
Kohzo Ito ◽  
Hideaki Yokoyama
Keyword(s):  
Polymer Brushes ◽  
Diblock Copolymers ◽  
Neutron Reflectivity ◽  
Molecular Architecture ◽  
Stimuli Responsive ◽  
Responsive Polymer ◽  
The Matrix ◽  
Stable Part ◽  
Copolymer Brushes ◽  
Mesoporous Membranes

In this study, we prepared ultrafiltration membranes with a decoupled responses of filtration property to temperature and pH. The membrane preparation method was developed based on our previous work. We utilized methanol-supercritical carbon dioxide (methanol-scCO<sub>2</sub>) selective swelling method to introduce nanopores to block copolymers containing poly(diethylene glycol) methyl ether methacrylate (PMEO<sub>2</sub>MA), poly(N,N-dimethylaminoethyl methacrylate) (PDMAEMA) and polystyrene (PS) blocks. Formation of the mesoporous barrier layer with PS being the mechanically stable part of the matrix was driven by selective swelling of the PMEO<sub>2</sub>MA-b-PDMAEMA domains. Due to the selective swelling of PMEO<sub>2</sub>MA or PDMAEMA domains to introduce pores, the interior of the pores are covered with PMEO<sub>2</sub>MA or PDMAEMA blocks after pore formation. The PMEO<sub>2</sub>MA-b-PDMAEMA polymer brushes are naturally attached on the pore walls and worked as functional gates. PMEO<sub>2</sub>MA is a non-toxic, neutral thermo-responsive polymer with LCST at 26 ᴼC. PDMAEMA is a typical weak polyelectrolyte with pK<sub>a</sub> value at 7.0-7.5 and also a thermo-responsive polymer revealed a LCST of 20-80 °C in aqueous solution. Therefore, these membranes were expected to have multi dimensions as function of the combination of temperature and pH. Moreover, to understand the detail of the temperature and pH depended conformation transitions of PMEO<sub>2</sub>MA-b-PDMAEMA brushes, those diblock copolymers were end-tethered on flat substrates and analyzed via neutron reflectivity (NR).

pH-Triggered release of gemcitabine from polymer coated nanodiamonds fabricated by RAFT polymerization and copper free click chemistry

2016 ◽  
Vol 7 (40) ◽  
pp. 6220-6230 ◽  
Author(s):  
Haiwang Lai ◽  
Mingxia Lu ◽  
Hongxu Lu ◽  
Martina H. Stenzel ◽  
Pu Xiao
Keyword(s):  
Drug Delivery ◽  
Pancreatic Cancer ◽  
Click Chemistry ◽  
Raft Polymerization ◽  
Stimuli Responsive ◽  
Triggered Release

Prodrug (gemcitabine)-based polymer coated nanodiamonds as stimuli-responsive drug delivery platforms for the treatment of pancreatic cancer.

On‐Surface RAFT Polymerization using Oxygen to form Triblock Copolymer Brushes

2021 ◽  
pp. 2100270
Author(s):  
Ji Hoon Lee ◽  
Hyun Ji Seo ◽  
Seung Yeon Lee ◽  
Woo Kyung Cho ◽  
Kyung‐sun Son
Keyword(s):  
Triblock Copolymer ◽  
Raft Polymerization ◽  
Copolymer Brushes
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