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Related Concept Videos

Olefin Metathesis Polymerization: Overview01:13

Olefin Metathesis Polymerization: Overview

Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists of a...
Polymer Classification: Architecture01:14

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Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...

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Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by &#960;-&#960; Stacking Interactions
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Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by π-π Stacking Interactions

Published on: October 10, 2016

Functionalized nanoporous polyethylene derived from miscible block polymer blends.

Toshinori Kato1, Marc A Hillmyer

  • 1Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, USA.

ACS Applied Materials & Interfaces
|January 1, 2013
PubMed
Summary
This summary is machine-generated.

Researchers developed functionalized nanoporous polyethylene by grafting thermo-responsive polymers onto pore walls. This modification improved water uptake, creating advanced materials for potential applications.

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Nanotechnology

Background:

  • Nanoporous materials offer unique properties but often require surface modification for tailored functionalities.
  • Polyethylene (PE) is a versatile polymer, but its inherent hydrophobicity limits its applications in aqueous environments.
  • Thermo-responsive polymers can alter their properties with temperature, enabling dynamic control over material characteristics.

Purpose of the Study:

  • To functionalize nanoporous polyethylene (PE) with thermo-responsive polymers, poly[2-(2-methoxyethoxy)ethyl methacrylate] (PMe(OE)(2)MA) and poly{2-[2-(2-methoxyethoxy)ethoxy]ethyl methacrylate} (PMe(OE)(3)MA).
  • To investigate the compatibility of these polymers with polylactide (PLA) for blend development.
  • To synthesize novel block copolymers and create functionalized nanoporous PE with enhanced water uptake.

Main Methods:

  • Controlled grafting of PMe(OE)(x)MA onto PE pore walls.
  • Blending of PLA and PMe(OE)(x)MA homopolymers to assess compatibility via glass transition temperatures.
  • Synthesis of PMe(OE)(x)MA-b-PE-b-PMe(OE)(x)MA block copolymers using ring-opening metathesis polymerization, atom transfer radical polymerization, and hydrogenation.
  • Selective removal of PLA from block copolymer blends using mild base treatment.

Main Results:

  • Compatibility studies revealed single or double glass transitions depending on polymer molar masses.
  • Block copolymer blends formed disordered bicontinuous structures comprising mixed PLA/PMe(OE)(x)MA and PE domains.
  • Selective removal of PLA resulted in nanoporous PE with PMe(OE)(x)MA grafted onto pore walls.
  • The functionalized nanoporous PE exhibited significantly improved water uptake.

Conclusions:

  • Thermo-responsive polymers can be successfully grafted onto nanoporous polyethylene.
  • The resulting functionalized nanoporous PE demonstrates enhanced hydrophilicity and water uptake capabilities.
  • This approach offers a pathway for designing advanced porous materials with tunable properties for various applications.