Poly propylene imine dendrimers as hydrogen donor in Type II photoinitiated free radical polymerization
Yazarlar (3)
| Makale Türü | Özgün Makale (SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale) | ||
| Dergi Adı | European Polymer Journal | ||
| Dergi ISSN | 0014-3057 Wos Dergi Scopus Dergi | ||
| Dergi Tarandığı Indeksler | SCI | ||
| Makale Dili | İngilizce | Basım Tarihi | 10-2007 |
| Kabul Tarihi | – | Yayınlanma Tarihi | 01-10-2007 |
| Cilt / Sayı / Sayfa | 43 / 10 / 4423–4430 | DOI | 10.1016/j.eurpolymj.2007.05.042 |
| Makale Linki | http://linkinghub.elsevier.com/retrieve/pii/S0014305707004247 | ||
| Özet |
| Three generations of poly(propylene imine) dendrimers, namely (PPI-16, PPI-32 and PPI-64; 16, 32 and 64 for generations 3, 4 and 5, respectively) were used as hydrogen donors in photoinitiated free radical polymerization of methyl methacrylate by using one of the following photosensitizers; benzophenone and thioxanthone. The effect of generation number of the dendrimer on photoinitiation efficiency and molecular weight of the resulting polymers was investigated. Glass transition temperatures and particle size measurements of the resulting polymers indicated the presence of nearly stretched polymer chains around the dendrimers. The location of hydrogen donating sites was evaluated by photolysis studies in the absence of monomer by using a stable radical namely, 2,2,6,6-tetramethylpiperidine-N-oxyl free radical (TEMPO) and showed that hydrogen abstraction occurs from the inner tertiary amino groups. The TEMPO attached dendrimers were further used in the nitroxide mediated radical polymerization (NMP) of styrene to yield star polymers. (C) 2007 Elsevier Ltd. All rights reserved. |
| Anahtar Kelimeler |
| photopolymerization | free radical polymerization | poly(propylene imine) dendrimers | methyl methacrylate | dendrimer-star polymers |
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| Atıf Sayıları |