TY  - CONF
AU  - Tomić, Nataša
AU  - Vuksanović, Marija
AU  - Kalifa, Mustafa
AU  - Stojanović, Dušica
AU  - Pavlović, Vladimir
AU  - Balanč, Bojana
AU  - Jančić Heinemann, Radmila
AU  - Marinković, Aleksandar
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6932
AB  - The aim of this study is to investigate the in uence of the polyhedral oligo silsesquioxanes (POSS)
structure obtained by facile synthesis on the improvement in mechanical properties of acrylate composite
 lms. The composite  lms consist of UV cured Bisphenol A glycidylmethacrylate/triethylene glycol
dimethacrylate (Bis-GMA/TEGDMA) as matrix and reactive POSS structures as reinforcement. Introduced
functionalities considering hydroxyl, both hydroxyl and allyl, and methacrylate groups in POSS-M,
POSS-M-A and POSS-M-Cl, respectively, enabled optimization of system compatibility. Composites
were made with 1, 3 and 5 wt. % of POSS particles. A morphology of hybrid composites was examined
by transmission electron microscopy (TEM). Cross-linking density (3), storage modulus (G'), damping
factor (tanδ) and Tg of the composites were determined from the dynamic-mechanical analysis (DMA).
A higher amount of methacrylate groups contributed to the increased cross-linking points and thus to
increased storage modulus for composites with POSS-M-Cl. Micro Vickers hardness (HV) of hybrid
composites showed incompatibility of POSS-M particles with Bis-GMA/TEGDMA matrix that led to
a decrease of composite hardness when compared to neat polymer matrix. The highest hardness
improvement was obtained by the addition of POSS-M-A reinforcement (increase by 50%). Brazilian
test was used to estimate the elastic modulus by the indirect test method and it indicated a decrease
in mechanical properties with the POSS addition higher than 1 wt.%. Methods used in this paper for
estimation of reinforcing e ect clearly indicate that the incompletely condensed POSS-M-A exhibit the optimal performance of composites based on Bis-GMA/TEGDMA matrix due to the presence of both
hydroxyl and allyl functional group.
PB  - Lisbon : Instituto Superior Tecnico
C3  - Book of Abstracts / 5th International Conference on Mechanics of Composites, MECHCOMP 2019, Instituto Superior Técnico, Lisbon, Portugal, 1-4 July 2019
T1  - Effect of novel nanocrystalline polyhedral oligo silesquioxanes (POSS) on the hybrid acrylate composites performance
EP  - 208
SP  - 207
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6932
ER  - 

@conference{
author = "Tomić, Nataša and Vuksanović, Marija and Kalifa, Mustafa and Stojanović, Dušica and Pavlović, Vladimir and Balanč, Bojana and Jančić Heinemann, Radmila and Marinković, Aleksandar",
year = "2019",
abstract = "The aim of this study is to investigate the in uence of the polyhedral oligo silsesquioxanes (POSS)
structure obtained by facile synthesis on the improvement in mechanical properties of acrylate composite
 lms. The composite  lms consist of UV cured Bisphenol A glycidylmethacrylate/triethylene glycol
dimethacrylate (Bis-GMA/TEGDMA) as matrix and reactive POSS structures as reinforcement. Introduced
functionalities considering hydroxyl, both hydroxyl and allyl, and methacrylate groups in POSS-M,
POSS-M-A and POSS-M-Cl, respectively, enabled optimization of system compatibility. Composites
were made with 1, 3 and 5 wt. % of POSS particles. A morphology of hybrid composites was examined
by transmission electron microscopy (TEM). Cross-linking density (3), storage modulus (G'), damping
factor (tanδ) and Tg of the composites were determined from the dynamic-mechanical analysis (DMA).
A higher amount of methacrylate groups contributed to the increased cross-linking points and thus to
increased storage modulus for composites with POSS-M-Cl. Micro Vickers hardness (HV) of hybrid
composites showed incompatibility of POSS-M particles with Bis-GMA/TEGDMA matrix that led to
a decrease of composite hardness when compared to neat polymer matrix. The highest hardness
improvement was obtained by the addition of POSS-M-A reinforcement (increase by 50%). Brazilian
test was used to estimate the elastic modulus by the indirect test method and it indicated a decrease
in mechanical properties with the POSS addition higher than 1 wt.%. Methods used in this paper for
estimation of reinforcing e ect clearly indicate that the incompletely condensed POSS-M-A exhibit the optimal performance of composites based on Bis-GMA/TEGDMA matrix due to the presence of both
hydroxyl and allyl functional group.",
publisher = "Lisbon : Instituto Superior Tecnico",
journal = "Book of Abstracts / 5th International Conference on Mechanics of Composites, MECHCOMP 2019, Instituto Superior Técnico, Lisbon, Portugal, 1-4 July 2019",
title = "Effect of novel nanocrystalline polyhedral oligo silesquioxanes (POSS) on the hybrid acrylate composites performance",
pages = "208-207",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6932"
}

Tomić, N., Vuksanović, M., Kalifa, M., Stojanović, D., Pavlović, V., Balanč, B., Jančić Heinemann, R.,& Marinković, A.. (2019). Effect of novel nanocrystalline polyhedral oligo silesquioxanes (POSS) on the hybrid acrylate composites performance. in Book of Abstracts / 5th International Conference on Mechanics of Composites, MECHCOMP 2019, Instituto Superior Técnico, Lisbon, Portugal, 1-4 July 2019
Lisbon : Instituto Superior Tecnico., 207-208.
https://hdl.handle.net/21.15107/rcub_technorep_6932

Tomić N, Vuksanović M, Kalifa M, Stojanović D, Pavlović V, Balanč B, Jančić Heinemann R, Marinković A. Effect of novel nanocrystalline polyhedral oligo silesquioxanes (POSS) on the hybrid acrylate composites performance. in Book of Abstracts / 5th International Conference on Mechanics of Composites, MECHCOMP 2019, Instituto Superior Técnico, Lisbon, Portugal, 1-4 July 2019. 2019;:207-208.
https://hdl.handle.net/21.15107/rcub_technorep_6932 .

Tomić, Nataša, Vuksanović, Marija, Kalifa, Mustafa, Stojanović, Dušica, Pavlović, Vladimir, Balanč, Bojana, Jančić Heinemann, Radmila, Marinković, Aleksandar, "Effect of novel nanocrystalline polyhedral oligo silesquioxanes (POSS) on the hybrid acrylate composites performance" in Book of Abstracts / 5th International Conference on Mechanics of Composites, MECHCOMP 2019, Instituto Superior Técnico, Lisbon, Portugal, 1-4 July 2019 (2019):207-208,
https://hdl.handle.net/21.15107/rcub_technorep_6932 .