Confined Dynamics in Nanophase-Separated Side Chain Polymers | Zendy

Mario Beiner | Zendy

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Confined Dynamics in Nanophase-Separated Side Chain Polymers

Author(s) -

Mario Beiner

Publication year - 2006

Publication title -

aip conference proceedings

Language(s) - English

Resource type - Conference proceedings

SCImago Journal Rank - 0.177

H-Index - 75

eISSN - 1551-7616

pISSN - 0094-243X

DOI - 10.1063/1.2204474

Subject(s) - alkyl , glass transition , side chain , materials science , polymer , monomer , polymer chemistry , arrhenius equation , methacrylate , homologous series , chemical engineering , crystallography , chemistry , organic chemistry , composite material , activation energy , engineering

The relaxation behavior of different series of nano- phase-separated side chain polymers with long alkyl groups is studied and compared with corresponding re- sults from the literature. Characteristic for these ho- mopolymers is that alkyl groups - belonging to different monomeric units and chains - aggregate to alkyl nanodomains with a typical dimension of about 0.5-2 nm. Relaxation spectroscopy data and calorimetric results show that a polyethylene-like glass transition (αPE) oc- curs within these alkyl nanodomains. The αPE process appears at temperatures below the conventional glass transition (α) where the main chains soften. The features of the αPE process in higher poly(n-alkyl methacrylates), poly(n-alkyl acrylates), poly(di-alkyl itaconates), poly(α-n-alkyl β-L-asparates) or hairy rod polyimides are similar (1). The influence of the alkyl nanodomain size on the αPE process is studied in detail.

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