Dynamical mechanical analysis of photocrosslinked hyperbranched urethane acrylates
Apstrakt
A series of acrylate functionalized samples based on hyperbranched hydroxy-terminated polyesters with different molecular weights and different degrees of acrylation were synthesized. The obtained urethane acrylates were slightly yellow viscose liquids. Their composition characterized by FTIR and H-1-NMR spectroscopy and their molecular weights were measured by GPC. All the synthesized samples were diluted with 25 wt.% 1.4-butanediol dimethacrylate (BDDM). The rheological properties of the uncured samples and the dynamic mechanical properties of the UV cured samples were examined. All the samples exhibit Newtonian behavior, which indicates the absence of physical entanglements in these polymers. The viscosity increases with increasing number of acrylic groups per molecule. The glass transition temperature of the UV cured samples increases with increasing the number of acrylic groups per molecule. The value of the storage modulus in the rubber-elastic plateau and the cross-link density ...increase with increasing number of acrylic groups per molecule. The formed networks are inhomogeneous and the residual unsaturation is the highest in the samples with the largest number of acrylic groups per molecule.
Ključne reči:
urethane acrylate / hyperbranched hydroxy-terminated polyester / FTIR / H-1-NMR / GPC / rheology / UV curing / dynamic mechanical propertiesIzvor:
Journal of the Serbian Chemical Society, 2004, 69, 6, 441-453Izdavač:
- Srpsko hemijsko društvo, Beograd
DOI: 10.2298/JSC0406441D
ISSN: 0352-5139
WoS: 000222393300004
Scopus: 2-s2.0-4143145226
Institucija/grupa
Tehnološko-metalurški fakultetTY - JOUR AU - Džunuzović, Enis AU - Tasić, S AU - Božić, B AU - Babić, Dragan AU - Dunjić, Branko PY - 2004 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/705 AB - A series of acrylate functionalized samples based on hyperbranched hydroxy-terminated polyesters with different molecular weights and different degrees of acrylation were synthesized. The obtained urethane acrylates were slightly yellow viscose liquids. Their composition characterized by FTIR and H-1-NMR spectroscopy and their molecular weights were measured by GPC. All the synthesized samples were diluted with 25 wt.% 1.4-butanediol dimethacrylate (BDDM). The rheological properties of the uncured samples and the dynamic mechanical properties of the UV cured samples were examined. All the samples exhibit Newtonian behavior, which indicates the absence of physical entanglements in these polymers. The viscosity increases with increasing number of acrylic groups per molecule. The glass transition temperature of the UV cured samples increases with increasing the number of acrylic groups per molecule. The value of the storage modulus in the rubber-elastic plateau and the cross-link density increase with increasing number of acrylic groups per molecule. The formed networks are inhomogeneous and the residual unsaturation is the highest in the samples with the largest number of acrylic groups per molecule. PB - Srpsko hemijsko društvo, Beograd T2 - Journal of the Serbian Chemical Society T1 - Dynamical mechanical analysis of photocrosslinked hyperbranched urethane acrylates EP - 453 IS - 6 SP - 441 VL - 69 DO - 10.2298/JSC0406441D ER -
@article{ author = "Džunuzović, Enis and Tasić, S and Božić, B and Babić, Dragan and Dunjić, Branko", year = "2004", abstract = "A series of acrylate functionalized samples based on hyperbranched hydroxy-terminated polyesters with different molecular weights and different degrees of acrylation were synthesized. The obtained urethane acrylates were slightly yellow viscose liquids. Their composition characterized by FTIR and H-1-NMR spectroscopy and their molecular weights were measured by GPC. All the synthesized samples were diluted with 25 wt.% 1.4-butanediol dimethacrylate (BDDM). The rheological properties of the uncured samples and the dynamic mechanical properties of the UV cured samples were examined. All the samples exhibit Newtonian behavior, which indicates the absence of physical entanglements in these polymers. The viscosity increases with increasing number of acrylic groups per molecule. The glass transition temperature of the UV cured samples increases with increasing the number of acrylic groups per molecule. The value of the storage modulus in the rubber-elastic plateau and the cross-link density increase with increasing number of acrylic groups per molecule. The formed networks are inhomogeneous and the residual unsaturation is the highest in the samples with the largest number of acrylic groups per molecule.", publisher = "Srpsko hemijsko društvo, Beograd", journal = "Journal of the Serbian Chemical Society", title = "Dynamical mechanical analysis of photocrosslinked hyperbranched urethane acrylates", pages = "453-441", number = "6", volume = "69", doi = "10.2298/JSC0406441D" }
Džunuzović, E., Tasić, S., Božić, B., Babić, D.,& Dunjić, B.. (2004). Dynamical mechanical analysis of photocrosslinked hyperbranched urethane acrylates. in Journal of the Serbian Chemical Society Srpsko hemijsko društvo, Beograd., 69(6), 441-453. https://doi.org/10.2298/JSC0406441D
Džunuzović E, Tasić S, Božić B, Babić D, Dunjić B. Dynamical mechanical analysis of photocrosslinked hyperbranched urethane acrylates. in Journal of the Serbian Chemical Society. 2004;69(6):441-453. doi:10.2298/JSC0406441D .
Džunuzović, Enis, Tasić, S, Božić, B, Babić, Dragan, Dunjić, Branko, "Dynamical mechanical analysis of photocrosslinked hyperbranched urethane acrylates" in Journal of the Serbian Chemical Society, 69, no. 6 (2004):441-453, https://doi.org/10.2298/JSC0406441D . .