Phase behaviour of blends of polyesters and polycarbonates

Utjecaj vrste i udjela diizocijanata na toplinska i mehanička svojstva mješavina poliuretana i polikarbonata

“…Međutim primjena polikarbonata (PC) u mješavinama s drugim polimerima ograničena je zbog visoke temperature prerade PC-a, na kojima može doći do njihove toplinske razgradnje. 8,9 Ti problemi mogu se djelomično riješiti miješanjem amorfnih i termoplastičnih materijala, kao što su polikarbonat i termoplastični poliuretan, pri čemu se dobivaju mješavine dobrih mehaničkih, toplinskih i reoloških svojstava. 10,11 Cilj ovoga rada je istražiti utjecaj vrste elastomera PU na njegovu mješljivost s PC-om i dobiti korelaciju između sastava mješavina, vrste i udjela pojedinih faza u mješavina-ma te utjecaj vrste elastomera PU na morfološku strukturu, mehanička, toplinska i reološka svojstva važna za primjenu.…”

“…Međutim primjena polikarbonata (PC) u mješavinama s drugim polimerima ograničena je zbog visoke temperature prerade PC-a, na kojima može doći do njihove toplinske razgradnje. 8,9 Ti problemi mogu se djelomično riješiti miješanjem amorfnih i termoplastičnih materijala, kao što su polikarbonat i termoplastični poliuretan, pri čemu se dobivaju mješavine dobrih mehaničkih, toplinskih i reoloških svojstava. …”

Miscibility of branched polycarbonate blends with poly(ethylene-co-1,4-dimethyl cyclohexane terephthalate) copolyesters

“…From early investigations related to the PC blends with polyester, it was confirmed that PC formed miscible blends with aliphatic polyesters containing approximately between two and seven methylene segments per ester group 4-6 and with polyesters containing alicyclic structures. 16,[18][19][20] Miscible PC blends with semi-aromatic polyesters such as poly(1,4-dimethyl cyclohexane terephthalate) (PCT) have been also reported in the literatures. [1][2][3]16,21 Among these miscible blends, PC blends with polyester containing alicyclic structure are using commercially as optical grades (GE, trade name: xylex ® ).…”

“…16,[18][19][20] Miscible PC blends with semi-aromatic polyesters such as poly(1,4-dimethyl cyclohexane terephthalate) (PCT) have been also reported in the literatures. [1][2][3]16,21 Among these miscible blends, PC blends with polyester containing alicyclic structure are using commercially as optical grades (GE, trade name: xylex ® ). Even though PC blends with aliphatic polyesters or with PCT are miscible, these blends are opaque because of the crystalline in polyesters.…”

Influence of copolymer composition of polyestercarbonate on miscibility with poly(butylene terephthalate)

“…Morphology changes affected by crystallization of PBT are also unavoidable to consider in drawing a thermodynamic phase diagram. Little theoretical consideration for thermodynamic miscibility has been made to date, 15 partly owing to the diverse factors affecting the PBT blend systems.…”