TY  - CONF
AU  - Marinović, Sanja
AU  - Stanković, Zoran
AU  - Tasić, Srba
AU  - Božić, Branislav
PY  - 2004
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6774
AB  - The aim of this work was to explore influence of hyperbranched polymers (HBP) on mechanical, thermal and dielectric properties of interpenetrating polymer networks (IPN), expecting to get a material with properties more superior then other known materials.
A combination of two polymers, in network form, of which at least one is synthesized and/or cross-linked in the immediate presence of the other without any covalent bonds between them. Most IPNs are heterogeneous systems comprised of one rubbery phase and one glassy phase which produce a synergistic effect yielding either high impact strength or reinforcement, both of which are dependent on phase continuity.
IPNs offer the possibility of combining in network form two otherwise non-compatible polymers with opposite properties. Similar to other multicomponent polymeric systems, the properties of the final product depend strongly on miscibility of the components.
In this case, IPNs based on hyperbranched polyesters have been made. All the IPNs are consist of acrylic component, cross-linked by photopolymerisation under UV-lamp, and urethane component, cross-linked by heating .
Hyperbranched polyesters, used in IPN samples were synthesized in three forms: 1) Hyperbranched polyester which has 25% of hydroxyl groups modified by 3,5,5-trimethyl hexanoic acid (isononanoic acid) -HBP(OH);
2) HBP(OH) which has 50% of hydroxyl groups acrylated-HBP(A)6
3) HBP(OH) which has 100% of hydroxyl groups acrylated-HBP(A)12.

We’ve made four groups of IPNs. The first was consisted of IPNs in which ratio of HBP(A)12 and ethyl hexyl acrylate (EHA) has been changed, keeping urethan component the same in all samples. Second group was the same as the first one, with only difference that HBP(A)12 has been changed with hexandiol diacrylate (HDDA). Third group contained IPNs in which hydroxyl acrylate has been changed with HBP(OH), and fourth group contained IPNs consisted of HBP(A)6.
IPNs have been characterized by Dynamic mechanical analysis (DMA), Differential scanning calorimetry (DSC); Dielectric analysis (DEA) and Thermo gravimetric analysis (TGA). We have compared results for samples inside groups, and correspondents between two groups.
It’s turned out that IPN correspondents in first and second group have similar behavior. We have also seen that IPNs with 50:50 ratio of HBP(A)12 : EHA in first, and HDDA ; EHA in second group had the best thermal stability and the highest glass temperature (Tg). Also, IPNs with HBP(OH) in urethane component (III group) had The highest Tgs then all other IPNs.
PB  - Belgrade : Serbian Chemical Society
C3  - Book of abstracts - 4th International Conference on the Chemical Societies of the South-East European Chemical Societies, ICOSECS4, July 18-21. 2004, Belgrade, Serbia
T1  - Hyperbranched acrylates in dual-curing systems
VL  - 2
SP  - 57
EP  - 57
UR  - https://hdl.handle.net/21.15107/rcub_cer_6774
ER  - 

@conference{
author = "Marinović, Sanja and Stanković, Zoran and Tasić, Srba and Božić, Branislav",
year = "2004",
abstract = "The aim of this work was to explore influence of hyperbranched polymers (HBP) on mechanical, thermal and dielectric properties of interpenetrating polymer networks (IPN), expecting to get a material with properties more superior then other known materials.
A combination of two polymers, in network form, of which at least one is synthesized and/or cross-linked in the immediate presence of the other without any covalent bonds between them. Most IPNs are heterogeneous systems comprised of one rubbery phase and one glassy phase which produce a synergistic effect yielding either high impact strength or reinforcement, both of which are dependent on phase continuity.
IPNs offer the possibility of combining in network form two otherwise non-compatible polymers with opposite properties. Similar to other multicomponent polymeric systems, the properties of the final product depend strongly on miscibility of the components.
In this case, IPNs based on hyperbranched polyesters have been made. All the IPNs are consist of acrylic component, cross-linked by photopolymerisation under UV-lamp, and urethane component, cross-linked by heating .
Hyperbranched polyesters, used in IPN samples were synthesized in three forms: 1) Hyperbranched polyester which has 25% of hydroxyl groups modified by 3,5,5-trimethyl hexanoic acid (isononanoic acid) -HBP(OH);
2) HBP(OH) which has 50% of hydroxyl groups acrylated-HBP(A)6
3) HBP(OH) which has 100% of hydroxyl groups acrylated-HBP(A)12.

We’ve made four groups of IPNs. The first was consisted of IPNs in which ratio of HBP(A)12 and ethyl hexyl acrylate (EHA) has been changed, keeping urethan component the same in all samples. Second group was the same as the first one, with only difference that HBP(A)12 has been changed with hexandiol diacrylate (HDDA). Third group contained IPNs in which hydroxyl acrylate has been changed with HBP(OH), and fourth group contained IPNs consisted of HBP(A)6.
IPNs have been characterized by Dynamic mechanical analysis (DMA), Differential scanning calorimetry (DSC); Dielectric analysis (DEA) and Thermo gravimetric analysis (TGA). We have compared results for samples inside groups, and correspondents between two groups.
It’s turned out that IPN correspondents in first and second group have similar behavior. We have also seen that IPNs with 50:50 ratio of HBP(A)12 : EHA in first, and HDDA ; EHA in second group had the best thermal stability and the highest glass temperature (Tg). Also, IPNs with HBP(OH) in urethane component (III group) had The highest Tgs then all other IPNs.",
publisher = "Belgrade : Serbian Chemical Society",
journal = "Book of abstracts - 4th International Conference on the Chemical Societies of the South-East European Chemical Societies, ICOSECS4, July 18-21. 2004, Belgrade, Serbia",
title = "Hyperbranched acrylates in dual-curing systems",
volume = "2",
pages = "57-57",
url = "https://hdl.handle.net/21.15107/rcub_cer_6774"
}

Marinović, S., Stanković, Z., Tasić, S.,& Božić, B.. (2004). Hyperbranched acrylates in dual-curing systems. in Book of abstracts - 4th International Conference on the Chemical Societies of the South-East European Chemical Societies, ICOSECS4, July 18-21. 2004, Belgrade, Serbia
Belgrade : Serbian Chemical Society., 2, 57-57.
https://hdl.handle.net/21.15107/rcub_cer_6774

Marinović S, Stanković Z, Tasić S, Božić B. Hyperbranched acrylates in dual-curing systems. in Book of abstracts - 4th International Conference on the Chemical Societies of the South-East European Chemical Societies, ICOSECS4, July 18-21. 2004, Belgrade, Serbia. 2004;2:57-57.
https://hdl.handle.net/21.15107/rcub_cer_6774 .

Marinović, Sanja, Stanković, Zoran, Tasić, Srba, Božić, Branislav, "Hyperbranched acrylates in dual-curing systems" in Book of abstracts - 4th International Conference on the Chemical Societies of the South-East European Chemical Societies, ICOSECS4, July 18-21. 2004, Belgrade, Serbia, 2 (2004):57-57,
https://hdl.handle.net/21.15107/rcub_cer_6774 .