Modification of Natural Rubber by Grafting with Hydrophilic Vinyl Monomers

Macromolecular Chemistry and Physics - Tập 206 Số 24 - Trang 2450-2460 - 2005
Wiyong Kangwansupamonkon1, Robert G. Gilbert2, Suda Kiatkamjornwong3
1National Nanotechnology Center, 111 Thailand Science Park, Paholyothin Road, Klong 1, Klong Luang, Pathumthani 12120, Thailand
2Key Centre for Polymer Colloids, University of Sydney, NSW 2006, Australia
3Program of Petrochemistry and Polymer Science, Faculty of Science, Chulalongkorn University, Phyathai Road, Bangkok 10330, Thailand

Tóm tắt

AbstractSummary: The grafting of two hydrophilic vinyl monomers, dimethylaminoethyl acrylate (DMAEA) and dimethylaminoethyl methacrylate (DMAEMA), onto natural rubber latex was carried out by emulsion polymerization using redox initiation. The effects of the redox initiator concentration and type (cumene hydroperoxide/tetraethylenepentamine, CHP/TEPA; tert‐butyl hydroperoxide/tetraethylenepentamine, t‐BHP/TEPA; potassium persulfate/potassium metabisulfite, K2S2O8/K2S2O5), the monomer concentration and the reaction temperature on the conversion, the grafting efficiency, the water absorption and the contact angles of the grafted copolymers films, and the colloidal stability of the latexes at low pH, were investigated. Infrared spectroscopic analysis confirmed that DMAEA and DMAEMA were grafted onto the natural rubber particles. The hairy layer structure of NR‐g‐poly(DMAEMA) latex particles was investigated by transmission electron microscopy using positive and negative stainings with OsO4 and phosphotungstic acid, respectively.TEM micrograph of NR‐g‐poly(DMAEMA) latex particles stained with 2% OsO4.magnified imageTEM micrograph of NR‐g‐poly(DMAEMA) latex particles stained with 2% OsO4.

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Tài liệu tham khảo

10.1016/j.polymer.2004.09.043

10.1071/CH05060

UK 624 079 (1949).

UK 778 102 (1957) invs.:R. N.Haward D.Katz A. N.Roper.

10.1016/0014-3057(78)90174-X

10.1016/0014-3057(78)90175-1

10.1016/0014-3057(78)90176-3

10.1002/1521-3900(200002)150:1<73::AID-MASY73>3.0.CO;2-4

10.1021/bm005654e

10.1016/j.polymer.2004.06.042

10.1021/bm034126a

10.5254/1.3538454

Brandrup J., 1999, Polymer Handbook

10.1002/app.1985.070300704

10.1002/app.2328

10.1016/j.radphyschem.2004.05.046

10.1016/S0032-3861(00)00277-9

10.1002/(SICI)1099-0488(20000215)38:4<525::AID-POLB4>3.0.CO;2-T

10.1002/(SICI)1097-4628(19961010)62:2<273::AID-APP3>3.0.CO;2-U

10.1016/S0032-3861(98)00711-3

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Thông tin xuất bản

Macromolecular Chemistry and Physics

Tập 206 Số 24

2450-2460

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