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Reactions of functional polymethacrylates grafted on phosphate‐modified calcium carbonate
Author(s) -
Nakatsuka Takuo,
Yamashita Shinzo
Publication year - 1983
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1983.070281118
Subject(s) - comonomer , polymer chemistry , monomer , methyl methacrylate , chemistry , reagent , isocyanate , styrene , polymer , methacrylate , grafting , lower critical solution temperature , materials science , nuclear chemistry , copolymer , polyurethane , organic chemistry
Five methacrylate monomers of methyl (MMA), dimethylaminoethyl (AEMA), 2‐chloroethyl (CEMA), 2,3‐epoxypropyl (GMA), and 2‐hydroxyethyl (HEMA) were graft‐polymerized in fine yields onto the calcium carbonate, which surface had been modified with 2,2′‐dimethyl‐2,2′‐azobisbutyronitrile‐4,4′‐dicarboxyethyl bisdihydrogenphosphate (AZDP). For the GMA and HEMA, styrene (St) was used as a hydrophobic comonomer for convenience to make homopolymers easily removed. The resulting grafted polymers were treated with such reagents: methyl iodide for the poly‐AEMA (pAEMA), sodium diethyldithiocarbamate (NaETC) for the poly‐CEMA (pCEMA), 2,2′‐iminodiethanol for the poly‐co‐GMA–St (pGMA–St), and m ‐trifluoromethylphenyl isocyanate for the poly‐co‐HEMA–St (pHEMA–St). Diffusive reflectance infrared spectroscopy indicated that these reactions resulted in excellent yields, whereas the detection of the product from NaETC and 6‐chlorohexyl dihydrogenphosphate (CHP)‐modified calcium carbonate failed. The results of thermal analyses (DSC–TG), gel permeation chromatography (GPC), and changes of their surface wettabilities toward water are also discussed.