Institute of Fundamental Technological Research
Polish Academy of Sciences

Staff

Mana Nabavian Kalat, MSc

Department of Experimental Mechanics (ZMD)
PhD student
telephone: (+48) 22 826 12 81 ext.: 366
room: 040
e-mail:

Recent publications
1.  Nabavian K.M., Razzaghi-Kashani M., The role of reduced graphene oxide as a secondary filler in improving the performance of silica-filled styrene-butadiene rubber compounds, POLYMER JOURNAL, ISSN: 0032-3896, DOI: 10.1038/s41428-021-00570-3, pp.1-11, 2021

Abstract:
The present work discusses the effects of reduced graphene oxide (rGO) on the nonlinear viscoelastic behavior, or the Payne effect, of silica/styrene-butadiene rubber compounds. The volume fraction of unmodified silica was constant, while the amount of rGO in these hybrid filler compounds varied. Dynamic-mechanical analysis (DMA) in strain sweep mode showed that adding a small quantity of rGO to the silica-filled compounds resulted in diminished network formation of unmodified silica as well as a reduced Payne effect and corresponding energy dissipation. The state of silica dispersion in the presence of rGO in the rubber matrix was predicted by calculating the work of adhesion in a three-component system and detected by scanning electron microscopy. It was observed that the dispersion of the unmodified silica was improved by the addition of only 0.25 or 0.5 phr rGO, which may be due to the improved silica-rubber interactions that occur during mixing and/or reduced silica flocculation after mixing, as measured by DMA in time sweep mode. The synergy between silica and small quantities of rGO (0.25 or 0.5 phr) resulted in an enhancement in mechanical strength (45%) and abrasion resistance (63%), as well as a reduction in heat build-up (23%). This hybrid system can be considered an alternative to silane modification of silica in green tire technology.

Affiliations:
Nabavian K.M. - IPPT PAN
Razzaghi-Kashani M. - Tarbiat Modares University (IR)
2.  Raef M., Hosseini S.M., Nabavian Kalat M., Razzaghi-Kashani M., Vulcanization kinetics of styrene butadiene rubber reinforced by graphenic particles, SPE Polymers, ISSN: 2690-3857, DOI: 10.1002/pls2.10039, pp.1-12, 2021

Abstract:
The present study discusses the effects of graphenic particles on the kinetics of sulfur vulcanization in styrene butadiene rubber composites. Using data obtained from a cure rheometer and fitted by an autocatalytic model, it was verified that graphenic particles follow our recently established catalytic-networking model for the effect of particles on the sulfur vulcanization of rubber, regardless of the type of particles. The magnitude of the catalytic and networking effects depends on surface chemistry and interfacial interactions of particles with rubber that can be tailored by the chemical reduction of graphene oxide. Accordingly, the reduction process decreased the catalytic effect due to the elimination of surface functional groups and increased the networking effect due to the enhancement of filler–rubber interactions and immobilization of rubber. The latter was verified by differential scanning calorimetry and bound rubber measurements.

Keywords:
graphene oxide, interfacial interactions, rubber composites, surface chemistry, vulcanization kinetics, wettability

Affiliations:
Raef M. - other affiliation
Hosseini S.M. - other affiliation
Nabavian Kalat M. - IPPT PAN
Razzaghi-Kashani M. - Tarbiat Modares University (IR)

Conference abstracts
1.  Nabavian K.M., Razzaghi-Kashani M., Pieczyska E., Staszczak M., The role of reduced graphene oxide as a secondary filler in reducing the energy dissipation of silica-filled styrene-butadiene rubber composites under dynamic deformation, TTP 2021, International Conference Thermography and Thermometry in Infrared, 2021-09-28/09-30, Kazimierz Dolny - on-line (PL), pp.1-2, 2021

Abstract:
Various quantities of reduced graphene-oxide (rGO) were added into silica-filled styrene-butadiene rubber (SBR) to make hybrid-filler composites. The non-linear viscoelastic behavior and corresponding energy dissipation of silica/rGO hybrid-filler and silica-filled composites were compared. Dynamic-mechanical analysis (DMA) of the hybrid-filler composites in strain-sweep showed that adding small quantity of rGO results in diminished silica network and reduced storage and loss modulus in silica-filled composites. Moreover, the synergy between silica and small quantities of rGO results in reduction of heat build-up (23%). The hybridization of silica/rGO was done without surface modification. This hybrid-filler system can be considered as an alternative to silane-modification of silica in industry.

Affiliations:
Nabavian K.M. - IPPT PAN
Razzaghi-Kashani M. - Tarbiat Modares University (IR)
Pieczyska E. - IPPT PAN
Staszczak M. - IPPT PAN
2.  Staszczak M., Pieczyska E., Nabavian K.M., Matsui R., Takeda K., Analiza energetyczna polimeru z pamięcią kształtu w procesie rozciągania, TTP 2021, International Conference Thermography and Thermometry in Infrared, 2021-09-28/09-30, Kazimierz Dolny - on-line (PL), pp.1-2, 2021

Abstract:
W ramach pracy przeprowadzono bilans energetyczny poliuretanu z pamięcią kształtu PU-SMP o temperaturze zeszklenia Tg = 25 °C w procesie rozciągania. Celem było oszacowanie ilości pracy mechanicznej niezbędnej do odkształcenia, ilości energii dyssypowanej oraz energii zmagazynowanej, tj. ukrytej w elementach zmienionej struktury tego polimeru. Dla wyższej prędkości odkształcania otrzymano wyższe wartości pracy zużytej na odkształcenie nieodwracalne oraz wyższe wartości ciepła dyssypowanego. Przeprowadzona analiza energetyczna procesu odkształcania wykazała, że praca zużyta na odkształcenie nieodwracalne nie magazynuje się w PU-SMP, tylko dysypuje. Może to mieć związek ze specyficzną budową polimeru z pamięcią kształtu, potwierdzoną przez badania strukturalne i odpowiadającą za jego właściwości.

Affiliations:
Staszczak M. - IPPT PAN
Pieczyska E. - IPPT PAN
Nabavian K.M. - IPPT PAN
Matsui R. - Aichi Institute of Technology (JP)
Takeda K. - Aichi Institute of Technology (JP)

Category A Plus

IPPT PAN

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