Dynamical mechanical analysis of photocrosslinked hyperbranched urethane acrylates
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.
Keywords:
urethane acrylate / hyperbranched hydroxy-terminated polyester / FTIR / H-1-NMR / GPC / rheology / UV curing / dynamic mechanical propertiesSource:
Journal of the Serbian Chemical Society, 2004, 69, 6, 441-453
DOI: 10.2298/JSC0406441D
ISSN: 0352-5139
WoS: 000222393300004
Scopus: 2-s2.0-4143145226
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VinčaTY - JOUR AU - Džunuzović, Enis S. AU - Tasic, S AU - Bozic, B AU - Babić, Dragan AU - Dunjic, B PY - 2004 UR - https://vinar.vin.bg.ac.rs/handle/123456789/2780 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. T2 - Journal of the Serbian Chemical Society T1 - Dynamical mechanical analysis of photocrosslinked hyperbranched urethane acrylates VL - 69 IS - 6 SP - 441 EP - 453 DO - 10.2298/JSC0406441D ER -
@article{ author = "Džunuzović, Enis S. and Tasic, S and Bozic, B and Babić, Dragan and Dunjic, B", 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.", journal = "Journal of the Serbian Chemical Society", title = "Dynamical mechanical analysis of photocrosslinked hyperbranched urethane acrylates", volume = "69", number = "6", pages = "441-453", doi = "10.2298/JSC0406441D" }
Džunuzović, E. S., Tasic, S., Bozic, B., Babić, D.,& Dunjic, B.. (2004). Dynamical mechanical analysis of photocrosslinked hyperbranched urethane acrylates. in Journal of the Serbian Chemical Society, 69(6), 441-453. https://doi.org/10.2298/JSC0406441D
Džunuzović ES, Tasic S, Bozic B, Babić D, Dunjic 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 S., Tasic, S, Bozic, B, Babić, Dragan, Dunjic, B, "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 . .