The homogeneous photopolymerization of methyl methacrylate by colloidal cadmium sulfide
Само за регистроване кориснике
1994
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
A completely new method of initiating the homogeneous radical polymerization of methyl methacrylate in bulk or in solution via the photogeneration of an electron hole pair in colloidal cadmium sulfide is presented. A polymerization mechanism involving an excited cadmium sulfide particle in both the initiation and termination steps is proposed. In the initiation a methyl methacrylate molecule is oxidized by a positive hole photogenerated in a CdS particle, which results in a novel chain‐end structure of the poly(methyl methacrylate) (PMMA). Degradative chain transfer to reduced excited cadmium sulfide particles is responsible for chain termination. Thus, for the first time, a detailed polymerization mechanism in which all states of the polymerization, i.e., initiation, propagation, chain transfer and termination, is presented for the polymerization of vinyl monomers initiated by semiconductors. Thermogravimetry (TG) showed that the newly synthesized PMMA has greatly enhanced thermal sta...bility when compared to normal radically prepared PMMA. In fact, the thermal stability approaches that of anionically prepared PMMA but is experimentally much easier to prepare. This technique enables the homogeneous embedding of CdS particles in a polymer matrix.
Извор:
Macromolecular Chemistry and Physics, 1994, 195, 3, 889-904Издавач:
- Wiley-VCH Verlag Gmbh, Weinheim
DOI: 10.1002/macp.1994.021950307
ISSN: 1022-1352
PubMed:
Scopus: 2-s2.0-84986738288
Институција/група
Tehnološko-metalurški fakultetTY - JOUR AU - Popović, Ivanka AU - Katsikas, Lynne AU - Müller, U. AU - Veličković, Jovan S. AU - Weller, Horst PY - 1994 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/58 AB - A completely new method of initiating the homogeneous radical polymerization of methyl methacrylate in bulk or in solution via the photogeneration of an electron hole pair in colloidal cadmium sulfide is presented. A polymerization mechanism involving an excited cadmium sulfide particle in both the initiation and termination steps is proposed. In the initiation a methyl methacrylate molecule is oxidized by a positive hole photogenerated in a CdS particle, which results in a novel chain‐end structure of the poly(methyl methacrylate) (PMMA). Degradative chain transfer to reduced excited cadmium sulfide particles is responsible for chain termination. Thus, for the first time, a detailed polymerization mechanism in which all states of the polymerization, i.e., initiation, propagation, chain transfer and termination, is presented for the polymerization of vinyl monomers initiated by semiconductors. Thermogravimetry (TG) showed that the newly synthesized PMMA has greatly enhanced thermal stability when compared to normal radically prepared PMMA. In fact, the thermal stability approaches that of anionically prepared PMMA but is experimentally much easier to prepare. This technique enables the homogeneous embedding of CdS particles in a polymer matrix. PB - Wiley-VCH Verlag Gmbh, Weinheim T2 - Macromolecular Chemistry and Physics T1 - The homogeneous photopolymerization of methyl methacrylate by colloidal cadmium sulfide EP - 904 IS - 3 SP - 889 VL - 195 DO - 10.1002/macp.1994.021950307 ER -
@article{ author = "Popović, Ivanka and Katsikas, Lynne and Müller, U. and Veličković, Jovan S. and Weller, Horst", year = "1994", abstract = "A completely new method of initiating the homogeneous radical polymerization of methyl methacrylate in bulk or in solution via the photogeneration of an electron hole pair in colloidal cadmium sulfide is presented. A polymerization mechanism involving an excited cadmium sulfide particle in both the initiation and termination steps is proposed. In the initiation a methyl methacrylate molecule is oxidized by a positive hole photogenerated in a CdS particle, which results in a novel chain‐end structure of the poly(methyl methacrylate) (PMMA). Degradative chain transfer to reduced excited cadmium sulfide particles is responsible for chain termination. Thus, for the first time, a detailed polymerization mechanism in which all states of the polymerization, i.e., initiation, propagation, chain transfer and termination, is presented for the polymerization of vinyl monomers initiated by semiconductors. Thermogravimetry (TG) showed that the newly synthesized PMMA has greatly enhanced thermal stability when compared to normal radically prepared PMMA. In fact, the thermal stability approaches that of anionically prepared PMMA but is experimentally much easier to prepare. This technique enables the homogeneous embedding of CdS particles in a polymer matrix.", publisher = "Wiley-VCH Verlag Gmbh, Weinheim", journal = "Macromolecular Chemistry and Physics", title = "The homogeneous photopolymerization of methyl methacrylate by colloidal cadmium sulfide", pages = "904-889", number = "3", volume = "195", doi = "10.1002/macp.1994.021950307" }
Popović, I., Katsikas, L., Müller, U., Veličković, J. S.,& Weller, H.. (1994). The homogeneous photopolymerization of methyl methacrylate by colloidal cadmium sulfide. in Macromolecular Chemistry and Physics Wiley-VCH Verlag Gmbh, Weinheim., 195(3), 889-904. https://doi.org/10.1002/macp.1994.021950307
Popović I, Katsikas L, Müller U, Veličković JS, Weller H. The homogeneous photopolymerization of methyl methacrylate by colloidal cadmium sulfide. in Macromolecular Chemistry and Physics. 1994;195(3):889-904. doi:10.1002/macp.1994.021950307 .
Popović, Ivanka, Katsikas, Lynne, Müller, U., Veličković, Jovan S., Weller, Horst, "The homogeneous photopolymerization of methyl methacrylate by colloidal cadmium sulfide" in Macromolecular Chemistry and Physics, 195, no. 3 (1994):889-904, https://doi.org/10.1002/macp.1994.021950307 . .