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Pregled bibliografske jedinice broj: 193859

Influence of accelerated ageing on metha-crylate-based denture resins heterogeneity as viewed by ESR-spin-probe method


Bubalo, Vatroslav; Jerolimov, Vjekoslav; Baučić, Ivo; Andreis, Mladen; Veksli, Zorica
Influence of accelerated ageing on metha-crylate-based denture resins heterogeneity as viewed by ESR-spin-probe method // Polymer international, 54 (2005), 5; 848-853 (međunarodna recenzija, članak, znanstveni)


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Naslov
Influence of accelerated ageing on metha-crylate-based denture resins heterogeneity as viewed by ESR-spin-probe method

Autori
Bubalo, Vatroslav ; Jerolimov, Vjekoslav ; Baučić, Ivo ; Andreis, Mladen ; Veksli, Zorica

Izvornik
Polymer international (0959-8103) 54 (2005), 5; 848-853

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
dental resins; electron spin resonance; spin-probe method; curing procedure; ageing; matrix heterogeneity

Sažetak
The electron-spin-resonance (ESR) spin-probe method, was used to study the heterogeneity of denture resins based on poly(methyl methacrylate). Results for three resins processed by microwave energy, conventional curing and cold curing (depending on the curing procedure and exposed to ageing in various environmental conditions) were compared. All three cured resins were stored over the same time (1200 h) in distilled water at ambient temperature and in artificial saliva at 348 K. The temperature-dependent ESR spectra of a spin probe dispersed in the denture resins are analyzed in terms of line-shapes and line-widths. The appearance of two spectral components was taken as an indication of resin heterogeneity. The results reveal that the cold-cured resin has a lower local density in comparison with microwave and conventionally cured resin. The amount of residual monomer also contributes to the local motion of polymer segments. The change of denture resins exposed to ageing is influenced both by the structure of the original resin and the ageing conditions. Restricted motion of a spin probe incorporated into the acrylic resins exposed to accelerated ageing suggests additional crosslinking of polymer chains. The differences are observed for all the investigated resins, but the highest change is observed with the cold-cured resin. The ESR results are accompanied by T-g and T-m measurements. (c) 2005 Society of Chemical Industry.

Izvorni jezik
Engleski

Znanstvena područja
Kemija



POVEZANOST RADA


Projekti:
0065100
0098038
0065014

Ustanove:
Institut "Ruđer Bošković", Zagreb


Citiraj ovu publikaciju

Bubalo, Vatroslav; Jerolimov, Vjekoslav; Baučić, Ivo; Andreis, Mladen; Veksli, Zorica
Influence of accelerated ageing on metha-crylate-based denture resins heterogeneity as viewed by ESR-spin-probe method // Polymer international, 54 (2005), 5; 848-853 (međunarodna recenzija, članak, znanstveni)
Bubalo, V., Jerolimov, V., Baučić, I., Andreis, M. & Veksli, Z. (2005) Influence of accelerated ageing on metha-crylate-based denture resins heterogeneity as viewed by ESR-spin-probe method. Polymer international, 54 (5), 848-853.
@article{article, year = {2005}, pages = {848-853}, keywords = {dental resins, electron spin resonance, spin-probe method, curing procedure, ageing, matrix heterogeneity}, journal = {Polymer international}, volume = {54}, number = {5}, issn = {0959-8103}, title = {Influence of accelerated ageing on metha-crylate-based denture resins heterogeneity as viewed by ESR-spin-probe method}, keyword = {dental resins, electron spin resonance, spin-probe method, curing procedure, ageing, matrix heterogeneity} }
@article{article, year = {2005}, pages = {848-853}, keywords = {dental resins, electron spin resonance, spin-probe method, curing procedure, ageing, matrix heterogeneity}, journal = {Polymer international}, volume = {54}, number = {5}, issn = {0959-8103}, title = {Influence of accelerated ageing on metha-crylate-based denture resins heterogeneity as viewed by ESR-spin-probe method}, keyword = {dental resins, electron spin resonance, spin-probe method, curing procedure, ageing, matrix heterogeneity} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus





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