Chain dimension of polystyrene-like hyperbranched polymers with various chain end groups in THF

Moriya Kikuchi, Motoyasu Kobayashi, Akihiro Tanaka, Atsushi Takahara

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1 Citation (Scopus)

Abstract

A hyperbranched polymer (HPS-DC) synthesized using N,N-diethylamino -dithiocarbamoylstyrene as an inimer and a hyperbranched poly(4-methylstyrene) (HPS-H) prepared by hydrogenation of the HPS-DC are characterized in tetrahydrofuran (THF) solutions by static and dynamic light scattering measurements. The experimental values of z-averaged mean-square radius of gyration (<S2>z1/2) and hydrodynamic radius (RH) of the HPS-H have smaller dimensions than those of the linear polystyrene (PS) at the same degree of polymerization (Nw), whereas the RH of the HPS-DC in the region of Nw < 700 is larger than that of the linear PS at the same Nw. The N w-dependence of <S2>z1/2 and RH for the HPS-H are described by a randomly trifunctional branched polymer model with the molecular weight per a branch point (4.55 × 10 3 g/mol) and the chain dimensions of the linear PS in THF at 25 °C.

Original languageEnglish
Article number012033
JournalJournal of Physics: Conference Series
Volume184
DOIs
Publication statusPublished - Jan 1 2009

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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