Rheological Properties of Hydroxyl-Terminated and End-Capped Aliphatic Hyperbranched Polyesters
Samo za registrovane korisnike
2015
Autori
Dunjić, BrankoTasić, Srba
Božić, Branislav
Aleksandrović-Bondžić, Vesna
Nikolić, Marija
Đonlagić, Jasna
Članak u časopisu (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
The rheological behavior of two series of aliphatic hyperbranched (HB) polyesters, based on 2,2-bis(hydroxymethyl) propionic acid (bis-MPA) and di-trimethylol propane (Di-TMP) as a tetrafunctional core, was studied. The effect of the size (pseudo-generation number, from second to eight) and structure on the melt rheological properties was investigated for a series of hydroxylterminated HB polyesters. In addition, the influence of the nature and degree of modification of the terminal OH groups in a series of fourth-generation polyesters end-capped with short and long alkyl chains and some aryl groups on the rheological properties was analyzed. The time-temperature superposition procedure was applied for the construction of master curves and for the analysis of the rheological properties of HB polyesters. The data obtained from WLF analysis of the HB polyesters showed that the values of the thermal coefficient of expansion of free volume alpha(f) and the fractional free volume at the gla...ss transition temperature, f(g), increase with increasing size of the HB polyesters. It was shown that the modified HB polyesters exhibited lower T-g and TG'-G '' temperatures, above which viscous became dominant over elastic behavior. From an analysis of the master curves of the modified HB polyesters, it was observed that with increasing degree of modification, both storage and loss modules and complex dynamic viscosity and apparent energy for viscoelastic relaxation decrease, because of reduced intermolecular hydrogen interactions. They do not exhibit a plateau of rubbery behavior, which confirms that no entanglements are present and that the molar masses are below the critical molar mass.
Ključne reči:
dendrimers / functionalization of polymers / hyperbranched polymers and macrocycles / polyesters / rheologyIzvor:
Journal of Applied Polymer Science, 2015, 132, 7Izdavač:
- Wiley, Hoboken
Finansiranje / projekti:
- Sinteza i karakterizacija novih funkcionalnih polimera i polimernih nanokompozita (RS-MESTD-Basic Research (BR or ON)-172062)
DOI: 10.1002/app.41479
ISSN: 0021-8995
WoS: 000345221800033
Scopus: 2-s2.0-84922876786
Institucija/grupa
Tehnološko-metalurški fakultetTY - JOUR AU - Dunjić, Branko AU - Tasić, Srba AU - Božić, Branislav AU - Aleksandrović-Bondžić, Vesna AU - Nikolić, Marija AU - Đonlagić, Jasna PY - 2015 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3025 AB - The rheological behavior of two series of aliphatic hyperbranched (HB) polyesters, based on 2,2-bis(hydroxymethyl) propionic acid (bis-MPA) and di-trimethylol propane (Di-TMP) as a tetrafunctional core, was studied. The effect of the size (pseudo-generation number, from second to eight) and structure on the melt rheological properties was investigated for a series of hydroxylterminated HB polyesters. In addition, the influence of the nature and degree of modification of the terminal OH groups in a series of fourth-generation polyesters end-capped with short and long alkyl chains and some aryl groups on the rheological properties was analyzed. The time-temperature superposition procedure was applied for the construction of master curves and for the analysis of the rheological properties of HB polyesters. The data obtained from WLF analysis of the HB polyesters showed that the values of the thermal coefficient of expansion of free volume alpha(f) and the fractional free volume at the glass transition temperature, f(g), increase with increasing size of the HB polyesters. It was shown that the modified HB polyesters exhibited lower T-g and TG'-G '' temperatures, above which viscous became dominant over elastic behavior. From an analysis of the master curves of the modified HB polyesters, it was observed that with increasing degree of modification, both storage and loss modules and complex dynamic viscosity and apparent energy for viscoelastic relaxation decrease, because of reduced intermolecular hydrogen interactions. They do not exhibit a plateau of rubbery behavior, which confirms that no entanglements are present and that the molar masses are below the critical molar mass. PB - Wiley, Hoboken T2 - Journal of Applied Polymer Science T1 - Rheological Properties of Hydroxyl-Terminated and End-Capped Aliphatic Hyperbranched Polyesters IS - 7 VL - 132 DO - 10.1002/app.41479 ER -
@article{ author = "Dunjić, Branko and Tasić, Srba and Božić, Branislav and Aleksandrović-Bondžić, Vesna and Nikolić, Marija and Đonlagić, Jasna", year = "2015", abstract = "The rheological behavior of two series of aliphatic hyperbranched (HB) polyesters, based on 2,2-bis(hydroxymethyl) propionic acid (bis-MPA) and di-trimethylol propane (Di-TMP) as a tetrafunctional core, was studied. The effect of the size (pseudo-generation number, from second to eight) and structure on the melt rheological properties was investigated for a series of hydroxylterminated HB polyesters. In addition, the influence of the nature and degree of modification of the terminal OH groups in a series of fourth-generation polyesters end-capped with short and long alkyl chains and some aryl groups on the rheological properties was analyzed. The time-temperature superposition procedure was applied for the construction of master curves and for the analysis of the rheological properties of HB polyesters. The data obtained from WLF analysis of the HB polyesters showed that the values of the thermal coefficient of expansion of free volume alpha(f) and the fractional free volume at the glass transition temperature, f(g), increase with increasing size of the HB polyesters. It was shown that the modified HB polyesters exhibited lower T-g and TG'-G '' temperatures, above which viscous became dominant over elastic behavior. From an analysis of the master curves of the modified HB polyesters, it was observed that with increasing degree of modification, both storage and loss modules and complex dynamic viscosity and apparent energy for viscoelastic relaxation decrease, because of reduced intermolecular hydrogen interactions. They do not exhibit a plateau of rubbery behavior, which confirms that no entanglements are present and that the molar masses are below the critical molar mass.", publisher = "Wiley, Hoboken", journal = "Journal of Applied Polymer Science", title = "Rheological Properties of Hydroxyl-Terminated and End-Capped Aliphatic Hyperbranched Polyesters", number = "7", volume = "132", doi = "10.1002/app.41479" }
Dunjić, B., Tasić, S., Božić, B., Aleksandrović-Bondžić, V., Nikolić, M.,& Đonlagić, J.. (2015). Rheological Properties of Hydroxyl-Terminated and End-Capped Aliphatic Hyperbranched Polyesters. in Journal of Applied Polymer Science Wiley, Hoboken., 132(7). https://doi.org/10.1002/app.41479
Dunjić B, Tasić S, Božić B, Aleksandrović-Bondžić V, Nikolić M, Đonlagić J. Rheological Properties of Hydroxyl-Terminated and End-Capped Aliphatic Hyperbranched Polyesters. in Journal of Applied Polymer Science. 2015;132(7). doi:10.1002/app.41479 .
Dunjić, Branko, Tasić, Srba, Božić, Branislav, Aleksandrović-Bondžić, Vesna, Nikolić, Marija, Đonlagić, Jasna, "Rheological Properties of Hydroxyl-Terminated and End-Capped Aliphatic Hyperbranched Polyesters" in Journal of Applied Polymer Science, 132, no. 7 (2015), https://doi.org/10.1002/app.41479 . .