Acrylic AB and ABA Block Copolymers Based on Poly(2-ethylhexyl acrylate) (PEHA) and Poly(methyl methacrylate) (PMMA) via ATRP

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • Dhruba J. Haloi - , Indian Institute of Technology Kharagpur (Autor:in)
  • Souvik Ata - , Indian Institute of Technology Kharagpur (Autor:in)
  • Nikhil K. Singha - , Indian Institute of Technology Kharagpur (Autor:in)
  • Dieter Jehnichen - , Leibniz-Institut für Polymerforschung Dresden (Autor:in)
  • Brigitte Voit - , Professur für Organische Chemie der Polymere (gB/IPF) (MTC3), Leibniz-Institut für Polymerforschung Dresden (Autor:in)

Abstract

Acrylic block copolymers have several advantages over conventional styrenic block copolymers, because of the presence of a saturated backbone and polar pendant groups. This investigation reports the preparation and characterization of di- and triblock copolymers (AB and ABA types) of 2-ethylhexyl acrylate (ERA) and methyl methacrylate (MMA) via atom transfer radical polymerization (ATRP). A series of block copolymers, PEHA-block-PMMA(AB diblock) and PMMA-block-PEHA-block-PMMA(ABA triblock) were prepared via ATRP at 90 degrees C using CuBr as catalyst in combination with N,N,N',N '',N ''-pentamethyl diethylenetriamine (PMDETA) as ligand and acetone as additive. The chemical structure of the macroinitiators and molar composition of block copolymers were characterized by H-1 NMR analysis, and molecular weights of the polymers were analyzed by GPC analysis. DSC analysis showed two glass transition temperatures (T-g), indicating formation of two domains, which was corroborated by AFM analysis. Small-angle X-ray scattering (SAXS) analysis of AB and ABA block copolymers showed scattering behavior inside the measuring limits indicating nanophase separation. However, SAXS pattern of AB diblock copolymers indicated general phase separation only, whereas for ABA triblock copolymer an ordered or mixed morphology could be deduced, which is assumed to be the reason for the better mechanical properties achieved with ABA block copolymers than with the AB analogues.

Details

OriginalspracheEnglisch
Seiten (von - bis)4200-4207
Seitenumfang8
FachzeitschriftACS applied materials & interfaces
Jahrgang4
Ausgabenummer8
PublikationsstatusVeröffentlicht - Aug. 2012
Peer-Review-StatusJa

Externe IDs

PubMed 22834708
Scopus 84865226242
ORCID /0000-0002-4531-691X/work/148607863

Schlagworte

Schlagwörter

  • 2-ethylhexyl acrylate (EHA), atom transfer radical polymerization (ATRP), Block copolymer, Mechanical properties, Morphology, thermoplastic elastomer (TPE)