The phys. and mech. properties of aliph. polyesters from monomers obtainable from renewable resources, namely, 1,3-propanediol and succinic acid, were improved by their combination with arom. urethane segments capable of establishing strong intermol. hydrogen bonds. Segmented poly(ester-urethanes) were synthesized from dihydroxy-terminated oligo(propylene succinate) chain-extended with MDI. The newly synthesized materials were exhaustively characterized by 1H NMR spectroscopy, size exclusion chromatog., differential scanning calorimetry, dynamic mech. anal., and with respect to their main static mech. properties, an Instron app. was used. The av. repeat no. of the hard segments, evaluated by NMR, ranged from 4 to 9, whereas that of the flexible segments was about 14. The degree of crystallinity, glass-transition temp., m.p., tensile strength, elongation, and Young's modulus were influenced by the ratio between hard and soft segments of the segmented copolymer in a predictable way. The results demonstrated that poly(ester-urethanes) from 1,3-propanediol and succinic acid are promising thermoplastics.
New segmented poly(ester-urethane)s from renewable resources / Y. Liu, M. Söderqvist Lindblad, E. Ranucci, A.-C. Albertsson. - In: JOURNAL OF POLYMER SCIENCE. PART A, POLYMER CHEMISTRY. - ISSN 0887-624X. - 39:5(2001), pp. 630-639.
|Titolo:||New segmented poly(ester-urethane)s from renewable resources|
RANUCCI, ELISABETTA (Penultimo)
|Parole Chiave:||biodegradable polymers; polymers from renewable sources; 1,3-propanediol; succinic acid; aliphatic poly(ester)s; poly(ester-urethane)s; 4,4 '-diisophenylmethane diisocyanate; segmented copolymers; chain extension; thermoplastic materials|
|Settore Scientifico Disciplinare:||Settore CHIM/04 - Chimica Industriale|
|Data di pubblicazione:||2001|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1002/1099-0518(20010301)39:5<630::AID-POLA1034>3.0.CO;2-1|
|Appare nelle tipologie:||01 - Articolo su periodico|
File in questo prodotto:
|Liu_et_al-2001-Journal_of_Polymer_Science_Part_A-_Polymer_Chemistry.pdf||Publisher's version/PDF||Administrator Richiedi una copia|