Miscibility and melting in poly(ethylene terephthalate)/ poly(bisphenol-A-carbonate) blends

Hanrahan, B. D.; Angeli, S. R.; Runt, James

doi:10.1007/bf00265729

Cited by 77 publications

(24 citation statements)

References 16 publications

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“…The miscibility of the PET/PC blends has been controversially discussed in literature, from completely miscible for all compositions [2], partially miscible [3,4] to completely immiscible for all compositions [5][6][7][8]. Blends of PET/PC were reported to be miscible in the high polyester range, but blends below 70% polyester were seemed to be immiscible [3,4].…”

Section: Introductionmentioning

confidence: 99%

Effects of composition and transesterification catalysts on the physico-chemical and dynamic properties of PC/PET blends rich in PC

Al-Jabareen¹,

Illescas

Maspoch

et al. 2010

J Mater Sci

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Melt blending of polycarbonate (PC)/poly (ethylene terephthalate) (PET) rich in PC at absence/present of different type of tranesterification catalysts was carried out by using reactive extrusion method. The thermal, dynamic, and morphological properties were studied. It was found that all blends are formed by a PC matrix and a semicrystalline (12-20% of crystallinity) of PET dispersed phase. The addition of a catalyst in the mixing process promotes a refined and homogeneous dispersion of PET, as well as it enhances the dynamicmechanical behavior of PC/PET blends compared with PC. These effects are attributed to the emulsifying effect of the PC-PET copolymer generated by transesterification. Additionally, this copolymer contributes to the miscibility between phases as demonstrated by the glass transition (T g ) shift of PC phase and PET phase.

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Section: Introductionmentioning

confidence: 99%

Effects of composition and transesterification catalysts on the physico-chemical and dynamic properties of PC/PET blends rich in PC

Al-Jabareen¹,

Illescas

Maspoch

et al. 2010

J Mater Sci

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“…Transreactions were not taken into consideration, although after annealing the blends showed improved Charpy impact strength and solution extraction data suggested copolymer formation. In the absence of significant transesterification, other authors [39] also reported an almost complete immiscibility in PC/PET blends, while in 1471, dealing with blends prepared by solution-casting and extrusion, the conclusion is drawn that PET dissolved to a greater extent in the PC-rich phase than did P C in the PET-rich phase.…”

Section: Pc/pet Blendsmentioning

confidence: 77%

Effects of Catalysts in the Reactive Blending of Bisphenol A Polycarbonate with Poly(alkylene terephthalate)s

Pilati¹,

Fiorini²,

Berti³

1999

Transreactions in Condensation Polymers

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“…[13][14][15][16] Probably, any of these authors reading reference 5, will naturally think on ester interchange reactions as an alternative explanation for the experimental results. In our opinion, investigating ester interchange reactions solely by DSC can lead to misleading results especially in the initial stages of the annealing treatments.…”

Section: On the Application Of Dsc To Study Ester Interchange Reactionsmentioning

confidence: 99%

Exothermal Process in Miscible Polylactide/Poly(vinyl phenol) Blends: Mixing Enthalpy or Chemical Reaction?

Zuza

Meaurio

Etxeberria³

et al. 2006

Macromol. Rapid Commun.

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Summary: In a previous paper (Macromolecules, 2005, 38, 9221), the enthalpy of mixing in poly(DL‐lactide) /poly(vinyl phenol) blends was directly measured by DSC. The first DSC scan for solution/precipitation blends showed phase separation, but miscibility was observed in the second DSC scan. Hence, miscibility was achieved after thermal treatment, an unusual behavior in polymer blend current research. However, the exothermal event observed during the first heating scan could also be the result of a chemical reaction. In this work, a new research study conducted to elucidate the nature of the exothermal heat observed in PDLA/PVPh during the first DSC heating scan. Since the single‐phase PDLLA/PVPh blend obtained after thermal treatment can be redissolved and reprecipitated, results obtained in the consecutive DSC scan prove that the process is completely reversible. Furthermore, GPC and 13C NMR results provide evidence that there is no change in the chemical structure of the studied polymers before and after the thermal treatment, which evidences the absence of transesterification reactions. Therefore, it can be concluded that the exothermal heat is the result of a mixing process, and miscibility is a consequence of specific interactions.New structure expected for transesterfication reactions.magnified imageNew structure expected for transesterfication reactions.

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Miscibility and melting in poly(ethylene terephthalate)/ poly(bisphenol-A-carbonate) blends

Cited by 77 publications

References 16 publications

Effects of composition and transesterification catalysts on the physico-chemical and dynamic properties of PC/PET blends rich in PC

Effects of composition and transesterification catalysts on the physico-chemical and dynamic properties of PC/PET blends rich in PC

Effects of Catalysts in the Reactive Blending of Bisphenol A Polycarbonate with Poly(alkylene terephthalate)s

Exothermal Process in Miscible Polylactide/Poly(vinyl phenol) Blends: Mixing Enthalpy or Chemical Reaction?

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