Compatibility studies of blends of polycarbonate and poly(ethylene terephthalate)

Kim, Woo Nyon; Burns, Charles M.

doi:10.1002/polb.1990.090280901

Cited by 67 publications

(31 citation statements)

References 30 publications

(4 reference statements)

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“…It was prepared by chemical reaction of carbon oxychloride (phosgene) with 2,2-bis (p-hydroxyphenylol) propane (supplied by AO Zarya, Volgograd, Russia); Poly(alkylene terephthalate) (PAT): Poly(butylene terephthalate) (PAT) with density 1.31 g/cm 3 , melting point 222°C, M w ϭ 65,000; solubility parameter 20.1 (J/cm 3 ) 0.5 ; and Polyethylene terephthalate (PBT) with density 1.33 g/cm 3 , melting point 250°C, M w ϭ 50,000; solubility parameter 21.2 (J/cm 3 ) 0.5 (supplied by Khimvolokno Co, Mogilev, Belarus). The solubility parameters for the polymers were calculated according to the well-known procedure.…”

Section: Experimental Materialsmentioning

confidence: 99%

“…14 The compatibility can obviously be improved by chemical reactions of transesterification and ester-ester exchange during the operations of mixing and processing of the molten components. 2,3 However, stronger adhesion between phases in the blend and the developments of quasi-uniform morphology result in lower impact strength of the materials prepared.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][5][6][7][8][9][10][11][12][13] In addition, PAT is helpful in lowering the cost of PC materials. Therefore, PC/ PAT blends find various applications.…”

Section: Introductionmentioning

confidence: 99%

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Polycarbonate/polyalkylene terephthalate blends: Interphase interactions and impact strength

Песецкий¹,

Jurkowski

Koval³

2002

J of Applied Polymer Sci

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Blends of polycarbonate (PC) and poly(alkylene terephthalate) (PAT) such as poly(butylene terephthalate) (PBT) and poly(ethylene terephthalate) (PET) were investigated. It was learned that processes of phase separation in blends consisting of PC and PAT can cause variations in properties of both the amorphous and crystalline phases. In PC/PBT blends the DSC technique did not detect crystalline portion of PBT with its concentrations up to 20 wt %. For PBT ϭ 40 wt %, it forms a continuous phase, and blend's crystallinity is close to the additive values. The glass transition temperature (T g ) shifts to the lower temperature region. The relaxation spectrometry revealed strong adhesion between phases in the blends over the temperature range from the completion of ␤-transition to T gPAT . This interaction becomes weaker between T gPAT and T gPC . Temperature-dependent variations in the molecular mobility and interphases interactions in the blends affect their impact strength. Over the temperature range where interphases interactions occur and the two components are in the glassy state, the blend is not impact resistant. Over the temperature range between T gPAT and T gPC the blends become impact-resistant materials. This is because energy of crack propagation in the PAT amorphous phase-being in a high-elastic state-dissipates. It is postulated that the effect of improving the impact strength of PC/PAT blends, which was found for temperatures between the glass transition temperatures of the mixed components, is also valid for other binary blends.

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Section: Experimental Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Polycarbonate/polyalkylene terephthalate blends: Interphase interactions and impact strength

Песецкий¹,

Jurkowski

Koval³

2002

J of Applied Polymer Sci

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“…(6) and (7) were proposed in our earlier studwhere f 1 is the apparent volume fraction of PS dissolved in the PS-rich phase, f Љ 1 is the apparent ies as follows [21][22][23] : volume fraction of PS dissolved in the PBD-rich phase, and m 1 and m 2 are essentially the numberln( the m is related to the number-average molecular weight of each polymer. In Table IV, it is found to be in reasonable agreement with the x 23 values (cf.…”

Section: Resultsmentioning

confidence: 99%

Determination of the Flory-Huggins interaction parameter of polystyrene?polybutadiene blends by thermal analysis

Lee

Kim

Burns

1997

J. Appl. Polym. Sci.

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Blends of polystyrene (PS) and polybutadiene (PBD) were investigated by differential scanning calorimetry. From the phase composition diagram of the blends, it appears that PBD dissolves more in the PS-rich phase than does PS in the PBD-rich phase. This result is consistent with the behavior of the specific heat increment at the glass transition temperature of PBD in the PS-PBD blends. From the measured glass transition temperature and apparent weight fractions of PS and PBD dissolved in each phase, values of the Flory-Huggins polymer-polymer interaction parameter ( x 12 ) were determined to be 0.0040-0.0102 depending on the composition and molecular weights of the PS and the PBD. No significant difference in x 12 was observed among the blending methods. The composition-dependent value of the Flory-Huggins polymer-polymer interaction parameter was found to be similar to the value of x 12 . The polymer-polymer interaction parameter appears to depend on the degree of polymerization of the polymers as well as on the apparent volume fraction of the polymers dissolved in each phase.

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“…7,13,14 Based upon the data (Table II), it is possible to determine the Flory-Huggins polymer-polymer interaction parameter ( 1,2 ). Assuming that the equilibrium condition for the blend systems was met, the following expression (2) can be derived from the free energy of mixing of two polymers: …”

Section: Figurementioning

confidence: 99%

Controlling the phase stability of polymer blends through the introduction of impenetrable interfaces

Oréfice¹,

Barbosa²,

Nogueira³

2002

J of Applied Polymer Sci

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In this work, the effect of the introduction of modified solid surfaces into polymer blends on the phaseseparation process was investigated. Glass fibers with surfaces having different chemistries were introduced into polystyrene-poly(methyl methacrylate) blends. The glass fibers used either had fully hydrated surfaces or had surfaces covered with a random copolymer, poly(styrene-co-methyl methacrylate). The copolymer was synthesized by free-radical polymerization of styrene and methyl methacrylate in the presence of previously vinyl silane-treated glass fibers. The copolymerization and grafting procedures were investigated by FTIR and thermal analysis. Blends containing the fibers were studied using FTIR microscopy and optical microscopy. FTIR microscopy results showed that the composition of the phases in the blends was shifted by using fibers with different surface chemistries. Fibers with grafted copolymers were capable of narrowing the immiscibility region in the phase diagram, while fully hydrated fibers were able to expand the gap. It was proposed that interfacial interactions regulated by a hydrophilic-hydrophobic type of forces were responsible for guiding the described phase-separation process.

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Compatibility studies of blends of polycarbonate and poly(ethylene terephthalate)

Cited by 67 publications

References 30 publications

Polycarbonate/polyalkylene terephthalate blends: Interphase interactions and impact strength

Polycarbonate/polyalkylene terephthalate blends: Interphase interactions and impact strength

Determination of the Flory-Huggins interaction parameter of polystyrene?polybutadiene blends by thermal analysis

Controlling the phase stability of polymer blends through the introduction of impenetrable interfaces

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