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Cationic coating polymerization of cyclopentadiene onto silica particles
Author(s) -
Spange Stefan,
Langhammer Elke
Publication year - 1997
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.1997.021980217
Subject(s) - cationic polymerization , polymerization , monomer , polymer chemistry , chemistry , trifluoroacetic acid , cyclopentadiene , triethoxysilane , polymer , coating , chemical engineering , organic chemistry , catalysis , engineering
Abstract The cationic polymerization of cyclopentadiene (CPD) initiated by different initiators (triphenylmethyl chloride, triphenylmethyl bromide, methyl triflate, and trifluoroacetic acid) onto silica particles yields polycyclopentadiene (PCPD)‐silica composites in high yield beside small amounts of soluble polymers. The novel PCPD‐silica particles are characterized by UV/VIS reflectance spectra and IR spectra. The percentage of coating (PG) is determined by combustion analysis and depends on the reaction temperature and the technical procedure of the polymerization. The influence of the initiator used and initiator/monomer ratio on the PG of the silica particles are investigated, too. It can be shown that the total amount of coating strongly depends on the initiator used. In case of trifluoroacetic acid initiation, particle aggregation takes place if the carbon content of the PCPD particles exceeds 15% carbon weight due to crosslinking between the PCPD layers of the coated silica particles, as evidenced by electron scanning microscopy.