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Characterization of the commercial hyperbranched polyesters

Karakterizacija komercijalnih hiperrazgranatih poliestara

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2010
726.pdf (386.9Kb)
Аутори
Džunuzović, Jasna
Jovanović, Slobodan M.
Lechner, Manfred D.
Чланак у часопису (Објављена верзија)
Метаподаци
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Апстракт
In this paper, properties of the commercially available Boltorn® hydroxy-functional aliphatic hyperbranched polyesters of the second, third and fourth pseudo generation, were investigated. Additionally, samples of the third and fourth pseudo generation were fractionated using the precipitation fractionation method to obtain three fractions of each sample, which were also investigated in this paper. According to the results obtained by GPC analysis, molar mass and polydispersity of the investigated Boltorn® hyperbranched polyesters increased with increase of the pseudo generation number. Value of the limiting viscosity number of the investigated samples, determined using the viscosity measurements of dilute solutions of these polymers in N-methyl-2-pyrrolidone, increased with the increase of the pseudo generation number. On the other hand, the value of the limiting viscosity number of the fractions decreased from the first up to the third fraction. The same trend was also observed for t...he values of the hydrodynamic diameter of parent samples and their fractions, determined by dynamic light scattering using N-methyl-2-pyrrolidone as solvent. The thermal properties of the investigated Boltorn® hyperbranched polyesters were determined by thermogravimetry in nitrogen atmosphere and it has been shown that thermal stability of these samples increased with increase of the pseudo generation number. End hydroxyl groups of the second and third pseudo generation samples were modified with β-alanine to obtain hyperbranched samples soluble in water. That was fully accomplished only for the Boltorn® hyperbranched polyester of the second pseudo generation. On the other hand, it was possible to dissolve the modified sample of the third pseudo generation in water only after adding a small amount of the NaOH.

U ovom radu prikazani su rezultati ispitivanja tri uzorka Boltorn® hidroksi-funkcionalnih hiperrazgranatih alifatskih poliestara druge, treće i četvrte pseudo generacije, kao i frakcija uzoraka treće i četvrte pseudo generacije. Primenom GPC analize pokazano je da sa povećanjem broja pseudo generacije dolazi do rasta molarne mase ali i polidisperznosti ovih uzoraka. Vrednosti graničnog viskozitetnog broja i hidrodinamičkog prečnika ispitivanih poliestara, određenih u N-metil-2-pirolidonu kao rastvaraču, rastu sa povećanjem broja pseudo generacije, dok kod frakcija ove vrednosti opadaju od prve do treće frakcije. Na osnovu termogravimetrijskih rezultata konstantovano je da termička stabilnost ovih uzoraka raste sa povećanjem broja pseudo- generacije. Modifikovanjem krajnjih hidroksilnih grupa Boltorn® hiperrazgranatog poliestra druge pseudo generacije β-alaninom dobijen je uzorak rastvoran u vodi, dok se uzorak treće pseudo generacije, takođe modifikovan β-alaninom, rastvorio u vodi nak...on dodavanja male količine NaOH.

Кључне речи:
Boltorn® hyper branched polyesters / viscosity number / thermal degradation / Boltorn® hiper razgranati poliestri / viskozni broj / termička degradacija
Извор:
Hemijska industrija, 2010, 64, 6, 547-553
Издавач:
  • Association of Chemical Engineers of Serbia
Финансирање / пројекти:
  • Синтеза и карактеризација нових функционалних полимера и полимерних нанокомпозита (RS-172062)

DOI: 10.2298/HEMIND101014060D

ISSN: 0367-598X

WoS: 000287224600008

Scopus: 2-s2.0-78651237293
[ Google Scholar ]
2
2
URI
https://cer.ihtm.bg.ac.rs/handle/123456789/728
Колекције
  • Radovi istraživača / Researchers' publications
Институција/група
IHTM
TY  - JOUR
AU  - Džunuzović, Jasna
AU  - Jovanović, Slobodan M.
AU  - Lechner, Manfred D.
PY  - 2010
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/728
AB  - In this paper, properties of the commercially available Boltorn® hydroxy-functional aliphatic hyperbranched polyesters of the second, third and fourth pseudo generation, were investigated. Additionally, samples of the third and fourth pseudo generation were fractionated using the precipitation fractionation method to obtain three fractions of each sample, which were also investigated in this paper. According to the results obtained by GPC analysis, molar mass and polydispersity of the investigated Boltorn® hyperbranched polyesters increased with increase of the pseudo generation number. Value of the limiting viscosity number of the investigated samples, determined using the viscosity measurements of dilute solutions of these polymers in N-methyl-2-pyrrolidone, increased with the increase of the pseudo generation number. On the other hand, the value of the limiting viscosity number of the fractions decreased from the first up to the third fraction. The same trend was also observed for the values of the hydrodynamic diameter of parent samples and their fractions, determined by dynamic light scattering using N-methyl-2-pyrrolidone as solvent. The thermal properties of the investigated Boltorn® hyperbranched polyesters were determined by thermogravimetry in nitrogen atmosphere and it has been shown that thermal stability of these samples increased with increase of the pseudo generation number. End hydroxyl groups of the second and third pseudo generation samples were modified with β-alanine to obtain hyperbranched samples soluble in water. That was fully accomplished only for the Boltorn® hyperbranched polyester of the second pseudo generation. On the other hand, it was possible to dissolve the modified sample of the third pseudo generation in water only after adding a small amount of the NaOH.
AB  - U ovom radu prikazani su rezultati ispitivanja tri uzorka Boltorn® hidroksi-funkcionalnih hiperrazgranatih alifatskih poliestara druge, treće i četvrte pseudo generacije, kao i frakcija uzoraka treće i četvrte pseudo generacije. Primenom GPC analize pokazano je da sa povećanjem broja pseudo generacije dolazi do rasta molarne mase ali i polidisperznosti ovih uzoraka. Vrednosti graničnog viskozitetnog broja i hidrodinamičkog prečnika ispitivanih poliestara, određenih u N-metil-2-pirolidonu kao rastvaraču, rastu sa povećanjem broja pseudo generacije, dok kod frakcija ove vrednosti opadaju od prve do treće frakcije. Na osnovu termogravimetrijskih rezultata konstantovano je da termička stabilnost ovih uzoraka raste sa povećanjem broja pseudo- generacije. Modifikovanjem krajnjih hidroksilnih grupa Boltorn® hiperrazgranatog poliestra druge pseudo generacije β-alaninom dobijen je uzorak rastvoran u vodi, dok se uzorak treće pseudo generacije, takođe modifikovan β-alaninom, rastvorio u vodi nakon dodavanja male količine NaOH.
PB  - Association of Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - Characterization of the commercial hyperbranched polyesters
T1  - Karakterizacija komercijalnih hiperrazgranatih poliestara
VL  - 64
IS  - 6
SP  - 547
EP  - 553
DO  - 10.2298/HEMIND101014060D
ER  - 
@article{
author = "Džunuzović, Jasna and Jovanović, Slobodan M. and Lechner, Manfred D.",
year = "2010",
abstract = "In this paper, properties of the commercially available Boltorn® hydroxy-functional aliphatic hyperbranched polyesters of the second, third and fourth pseudo generation, were investigated. Additionally, samples of the third and fourth pseudo generation were fractionated using the precipitation fractionation method to obtain three fractions of each sample, which were also investigated in this paper. According to the results obtained by GPC analysis, molar mass and polydispersity of the investigated Boltorn® hyperbranched polyesters increased with increase of the pseudo generation number. Value of the limiting viscosity number of the investigated samples, determined using the viscosity measurements of dilute solutions of these polymers in N-methyl-2-pyrrolidone, increased with the increase of the pseudo generation number. On the other hand, the value of the limiting viscosity number of the fractions decreased from the first up to the third fraction. The same trend was also observed for the values of the hydrodynamic diameter of parent samples and their fractions, determined by dynamic light scattering using N-methyl-2-pyrrolidone as solvent. The thermal properties of the investigated Boltorn® hyperbranched polyesters were determined by thermogravimetry in nitrogen atmosphere and it has been shown that thermal stability of these samples increased with increase of the pseudo generation number. End hydroxyl groups of the second and third pseudo generation samples were modified with β-alanine to obtain hyperbranched samples soluble in water. That was fully accomplished only for the Boltorn® hyperbranched polyester of the second pseudo generation. On the other hand, it was possible to dissolve the modified sample of the third pseudo generation in water only after adding a small amount of the NaOH., U ovom radu prikazani su rezultati ispitivanja tri uzorka Boltorn® hidroksi-funkcionalnih hiperrazgranatih alifatskih poliestara druge, treće i četvrte pseudo generacije, kao i frakcija uzoraka treće i četvrte pseudo generacije. Primenom GPC analize pokazano je da sa povećanjem broja pseudo generacije dolazi do rasta molarne mase ali i polidisperznosti ovih uzoraka. Vrednosti graničnog viskozitetnog broja i hidrodinamičkog prečnika ispitivanih poliestara, određenih u N-metil-2-pirolidonu kao rastvaraču, rastu sa povećanjem broja pseudo generacije, dok kod frakcija ove vrednosti opadaju od prve do treće frakcije. Na osnovu termogravimetrijskih rezultata konstantovano je da termička stabilnost ovih uzoraka raste sa povećanjem broja pseudo- generacije. Modifikovanjem krajnjih hidroksilnih grupa Boltorn® hiperrazgranatog poliestra druge pseudo generacije β-alaninom dobijen je uzorak rastvoran u vodi, dok se uzorak treće pseudo generacije, takođe modifikovan β-alaninom, rastvorio u vodi nakon dodavanja male količine NaOH.",
publisher = "Association of Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "Characterization of the commercial hyperbranched polyesters, Karakterizacija komercijalnih hiperrazgranatih poliestara",
volume = "64",
number = "6",
pages = "547-553",
doi = "10.2298/HEMIND101014060D"
}
Džunuzović, J., Jovanović, S. M.,& Lechner, M. D.. (2010). Characterization of the commercial hyperbranched polyesters. in Hemijska industrija
Association of Chemical Engineers of Serbia., 64(6), 547-553.
https://doi.org/10.2298/HEMIND101014060D
Džunuzović J, Jovanović SM, Lechner MD. Characterization of the commercial hyperbranched polyesters. in Hemijska industrija. 2010;64(6):547-553.
doi:10.2298/HEMIND101014060D .
Džunuzović, Jasna, Jovanović, Slobodan M., Lechner, Manfred D., "Characterization of the commercial hyperbranched polyesters" in Hemijska industrija, 64, no. 6 (2010):547-553,
https://doi.org/10.2298/HEMIND101014060D . .

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