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- Title
Surface photografting polymerization of trimethylolpropane triacrylate onto LDPE substrate in tetrahydrofuran/water mixtures.
- Authors
Lifu Wang; Yibing Yu; Lianying Liu; Wantai Yang
- Abstract
A surface photografting polymerization (λ > 300 nm) of a multifunctional monomer which was trimethylolpropane triacrylate (TMPTA), was conducted with benzophenone (BP) as photoinitiator and LDPE as model substrate, in mixed solvents containing tetrahydrofuran (THF) and water. Proved by ATRâIR, highly crosslinked grafted layer was generated rapidly under UV irradiation. Effects on percent conversion of grafting are detailed with, such as feed ratio of BP to TMPTA, mass percent of TMPTA in the reaction system, mass percent of water in the mixed solvents and addition of the second monomer, methyl methacrylate (MMA). As both verified by SEM and AFM, relatively planar grafted layer was produced when photografting was carried out merely in THF; adding water in the reaction system caused the formation of âcratersâ in the grafted layer. In addition, effects of mass percent of water in the mixed solvents, UV irradiation time, TMPTA concentration and addition of MMA on the size, shape and quantity of the âcratersâ were investigated by SEM. A plausible mechanism for the formation of âcratersâ is also proposed. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007
- Subjects
POLYMERIZATION; TETRAHYDROFURAN; SOLUTION (Chemistry); CHEMICAL reactions
- Publication
Journal of Applied Polymer Science, 2007, Vol 106, Issue 1, p621
- ISSN
0021-8995
- Publication type
Article
- DOI
10.1002/app.26610