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Helical Polymer Particles Derived from Aromatic Acetylenics and Prepared by Suspension Polymerization
Author(s) -
Lin Jiangfeng,
Zhang Haiyang,
Liang Junya,
Deng Jianping
Publication year - 2015
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201500229
Subject(s) - polyvinylpyrrolidone , polymerization , polymer , polymer chemistry , suspension polymerization , materials science , chemical engineering , monomer , thermogravimetric analysis , aqueous solution , phenylacetylene , chemistry , catalysis , organic chemistry , composite material , engineering
Polymeric particles are constructed by aromatic acetylene derivatives through suspension polymerization approach. Phenylacetylene and 1‐naphthylacetylene are used as monomers to conduct suspension polymerization in aqueous media at room temperature by using (nbd)Rh + B – (C 6 H 5 ) 4 as catalyst and polyvinylpyrrolidone (PVP) as stabilizer. The suspension polymerizations provide polymeric particles in high yield (>80%). Scanning electron microscopic images demonstrate that the particles assumed spherical morphology. The key factors influencing the formation of particles are systemically investigated. Under the optimized conditions, i.e., stirring speed being 500 rpm and with PVP as stabilizer in aqueous media, the resulting polyphenylacetylene particles exhibit satisfactory regularity in spherical morphology. Fourier‐transform infrared and 1 H NMR spectra confirm the occurrence of polymerization, while UV–vis absorption spectra demonstrate the helical structures of the polymer chains constructing the particles. The polymer chains form high cis contents (>87%) according to Raman spectra. Thermogravimetric analysis shows the high thermostability of the particles.