Effect of transesterification products on the miscibility and phase behavior of poly(trimethylene terephthalate)/bisphenol A polycarbonate blends

Yavari, A.R.; Asadinezhad, Ahmad; Jafari, Seyed Hassan; Khonakdar, Hossein Ali; Böhme, Frank; Häßler, R.

doi:10.1016/j.eurpolymj.2005.06.004

Cited by 42 publications

(42 citation statements)

References 22 publications

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“…(1) is 30 kJ/ mol ¼ 145.5 J/g as determined by Pyda et al 48 DH c for PTT/10% PC blend becomes smaller, its crystallinity also changed from 31.7% to only 9.1% for the first cycle versus third cycle as shown in Table I. All the phenomena observed here suggest that PTT and PC becomes more and more miscible through transesterification with repeated melting, which has good agreement with previous studies done by Xue et al, Aravind et al, and Yavari et al 29,49,50 Very similar phenomena were also reported for PET/PC 51 and PBT/PC. 52 …”

Section: Differential Scanning Calorimetrysupporting

confidence: 93%

Morphology, dynamic mechanical, and electrical properties of bio‐based poly(trimethylene terephthalate) blends, part 2: Poly(trimethylene terephthalate)/poly(ether esteramide)/polycarbonate blends

Kobayashi¹,

Wood²,

Takemura³

2011

J of Applied Polymer Sci

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Bio-based poly(trimethylene terephthalate) (PTT) and poly(ether esteramide) (PEEA) blends were prepared by melt processing with varying weight ratios (0-20 wt %) of polycarbonate (PC). The blends were characterized by differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), polarized light microscopy (PLM), and transmission electron microscopy (TEM). Electrostatic performance was also investigated for those PTT blends since PEEA is known as an ion conductive polymer. DMA suggests that PC is miscible with PEEA and selectively goes into PEEA phase in case of ternary blends of PTT/PEEA/ PC. The glass transition temperature (T g ) for PC/PEEA is well predicted by Gordon Taylor equation. Addition of PC retards the electrostatic decay performance of PTT/PEEA blends by restricting the motion of ions in PEEA through increasing the T g of PEEA.

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Section: Differential Scanning Calorimetrysupporting

confidence: 93%

Morphology, dynamic mechanical, and electrical properties of bio‐based poly(trimethylene terephthalate) blends, part 2: Poly(trimethylene terephthalate)/poly(ether esteramide)/polycarbonate blends

Kobayashi¹,

Wood²,

Takemura³

2011

J of Applied Polymer Sci

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“…The detailed investigations of the transesterification reaction for PTT/PC blend system are reported elsewhere. [35] Figure 4 exhibits the storage modulus of the PTT/PC binary blends as a function of angular frequency along with those of the neat components. It is observed that the storage modulus of the blends increases upon increasing PC content.…”

Section: Resultsmentioning

confidence: 99%

“…[29] Therefore, PTT has recently attracted several investigations into its characteristics either in the pure form [29][30][31][32] or blends. [33][34][35][36][37][38][39][40][41][42] Summary: Blends of poly(trimethylene terephthalate) (PTT) and polycarbonate (PC) over full composition range were prepared using a twin-screw extruder. A glycidyl methacrylate-based terpolymer was used to modify the interface of the blends.…”

Section: Introductionmentioning

confidence: 99%

Linear Viscoelastic Characteristics of Poly(trimethylene terephthalate)/Polycarbonate Blends in the Melt State

Yavari¹,

Asadinezhad²,

Jafari³

et al. 2005

Macro Materials & Eng

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Summary: Blends of poly(trimethylene terephthalate) (PTT) and polycarbonate (PC) over full composition range were prepared using a twin‐screw extruder. A glycidyl methacrylate‐based terpolymer was used to modify the interface of the blends. Morphological examinations were carried out using transmission electron microscopy (TEM) and confirmed the biphasic structure of the blends. Dynamic rheological response of the blends was recorded in the linear viscoelastic region. It was observed that addition of the terpolymer to the system increases the dynamic shear moduli and complex viscosity of the blends, which is attributed to interactions of the terpolymer at the interface of two phases leading to a restricted chain mobility of the blend components. The Veenstra model was found to be able to describe dynamic shear modulus of the PTT/PC 50/50 blend; however, for the compatibilized blend of PTT/PC 50/50, the fit is not as good as that of uncompatibilized system, which is believed to be due to formation of micelles in this system.

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“…The extent of these reactions depends highly on the heat treatment duration and temperature which in turn affects the physical characteristics of the thermally treated blends. [14,15] The literature review shows that 1 H NMR spectroscopy is a useful tool to trace the various copolyesters resulting from the interchange interactions between corresponding homopolyesters. [16] Based on previous reports, [17] the most likely sequences of various triads centering on the ethylene units of PET/PEN blends are assumed to be those illustrated in Scheme 2.…”

Section: H Nmr Analysismentioning

confidence: 99%

An Improved Non‐Isothermal Kinetic Model for Prediction of Extent of Transesterification Reaction and Degree of Randomness in PET/PEN Blends

Golriz

Khonakdar

Jafari

et al. 2008

Macro Theory & Simulations

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An improved non‐isothermal kinetic model was developed based on mass balance and Arrhenius laws using a second‐order reversible reaction capable of predicting the extent of transesterification reaction (X) and the degree of randomness (RD) in poly(ethylene terephthalate) (PET)/poly(ethylene naphthalene‐2,6‐dicarboxylate) (PEN) blends prepared by a twin screw micro‐compounder over a full composition range under different processing conditions. The experimental values of X and RD were determined by 1H‐NMR and a direct relationship between them developed. The model constants were tuned by an optimization method using half of the experimental data, with the other half used for verification. Good agreement was found between the experimental and theoretical data in the verification stage and, therefore, it was concluded that the model is capable of predicting the extent of transesterification reaction with a high level of confidence for a wide range of processing conditions. Similarly to the experimental results, the model showed that, among all parameters affecting the extent of transesterification reaction, the time and temperature play the major role, whereas the blend composition does not have a significant role.magnified image

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Effect of transesterification products on the miscibility and phase behavior of poly(trimethylene terephthalate)/bisphenol A polycarbonate blends

Cited by 42 publications

References 22 publications

Morphology, dynamic mechanical, and electrical properties of bio‐based poly(trimethylene terephthalate) blends, part 2: Poly(trimethylene terephthalate)/poly(ether esteramide)/polycarbonate blends

Morphology, dynamic mechanical, and electrical properties of bio‐based poly(trimethylene terephthalate) blends, part 2: Poly(trimethylene terephthalate)/poly(ether esteramide)/polycarbonate blends

Linear Viscoelastic Characteristics of Poly(trimethylene terephthalate)/Polycarbonate Blends in the Melt State

An Improved Non‐Isothermal Kinetic Model for Prediction of Extent of Transesterification Reaction and Degree of Randomness in PET/PEN Blends

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