Single‐Phase blends of polycarbonate and poly(phenyl methacrylate)

Kyu, Thein; Park, Dongkyu; Cho, Wookap

doi:10.1002/app.1992.070441220

Cited by 7 publications

(2 citation statements)

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“…Glass‐transition temperatures of about 127 °C were obtained for all of the PPhMA samples (Table III) as well as compared with values of 122–128 °C reported previously by DSC using the midpoint method23, 24 and values as low as 110 °C and as high as 134 °C by other methods 25. The tacticities were not reported along with T g in any previous work.…”

Section: Resultssupporting

confidence: 68%

Poly(phenyl methacrylate) and poly(1-naphthyl methacrylate) prepared in microemulsions

Pilcher

Ford

2001

J. Polym. Sci. A Polym. Chem.

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Phenyl methacrylate and 1‐naphthyl methacrylate were polymerized in microemulsions using stearyltrimethylammonium chloride, cetyltrimethylammonium bromide, and a mixture of nonionic Triton surfactants to form latexes that were 20–30 nm in diameter. A temperature of 70 °C was needed to obtain polymers using thermal initiation. The tacticities of poly(phenyl methacrylate) (PPhMA) (55% rr) and poly(1‐naphthyl methacrylate) (P‐1‐NM) (47% rr) were the same as those of the polymers prepared in toluene solutions. The weight average molecular weights were 1 × 106 and 5 × 105 g/mol for PPhMA and P‐1‐NM prepared in microemulsions with very broad distributions. PPhMA samples from microemulsions and solution had the same Tg = 127 °C. P‐1‐NM from microemulsions had Tg = 145–147 °C compared with Tg = 142 °C for P‐1‐NM from solution. The molecular weights and the glass‐transition temperatures of both PPhMA and P‐1‐NM from microemulsions are substantially higher than any previously reported. © 2001 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 39: 519–524, 2001

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Section: Resultssupporting

confidence: 68%

Poly(phenyl methacrylate) and poly(1-naphthyl methacrylate) prepared in microemulsions

Pilcher

Ford

2001

J. Polym. Sci. A Polym. Chem.

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“…We have demonstrated that the blends of the PC/ PPMA are completely miscible 19 and the birefringence and tensile properties of the blends were excellent. It is therefore of paramount importance to identify the origin of miscibility and to estimate the extent of miscibility by determining z12 interaction parameter.…”

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confidence: 90%

Solvent-Induced Crystallization and Interaction Parameter of the Blends of Bisphenol A Polycarbonate and Poly(phenyl methacrylate)

Park

Hong

1997

Polym J

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ABSTRACT:Blends of bisphenol A polycarbonate (PC) and poly(phenyl methacrylate) (PPMA) were crystallized by tetrahydrofuran (THF) solvent to investigate the phenomena of solvent-induced crystallization. The optimum conditions for solvent induced crystallization in PC have been determined. Interaction parameter has been calculated based on the melting point depression method to estimate the extent of miscibility. A negative interaction parameter (z 12 = -0.21) obtained from the melting point depression method suggests that there is some attractive interaction between the blend components.KEY WORDS Blend / Solvent Induced Crystallization / Interaction Parameter / Polycarbonate (PC) has been widely used both as a blend partner and by itself because it has outstanding engineering properties. Furthermore, due to its remarkable transparency, PC has been recognized as a suitable plastic for optical storage disc. 1 -4 The criteria of such optical materials 4 require low birefringence, low hygroscopicity, high transmission, dimensional stability, processability, and good mechanical properties. These stringent requirements can be fulfilled by specially designed polycarbonates. 2 However, PC shows a large positive birefringence, 5 which might cause optical distortion, owing to the presence of aromatic groups in the main chain. This positive birefringence can be eliminated substantially by blending with a polymer which has negative birefringence and can form a single phase with the constituent polymer. Poly(phenyl methacrylate) (PPMA) may be chosen as the blend partner of PC to form a miscible birefringence-free blend. For this reason, the birefringence-free composition of the PC/PPMA blend may be determined. The copolymers of PPMA and their blends often been reported to be used as optical lenses 6 -16 and optical disk recording materials 1 7 because of the high refractive index (1.5706) and high transparency of PPMA. But PPMA is very brittle and has low dimensional and thermal stability. 18 On the other hand, PC shows tough and ductile properties, good processability, thermal stability, and good electrical properties, but its poor scratch resistance and thermal stresscracking with its large birefringence are disadvantages. lt can be expected, therefore, that the drawbacks of each pure component can be overcome by blending the two components. By controlling the compositions of the blends, the improvement of physical properties may be achieved.We have demonstrated that the blends of the PC/ PPMA are completely miscible 19 and the birefringence and tensile properties of the blends were excellent. It is therefore of paramount importance to identify the origin of miscibility and to estimate the extent of miscibility by determining z12 interaction parameter. It has been known that solvent-induced crystallization can occur in PC. In this paper, the phenomena of solvent-induced 970 crystallization and the melting behavior of PC in the blends have been investigated. Subsequently, z12 interaction parameter was calculated based on ...

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Miscible Polymers

Krause

Goh

1999

The Wiley Database of Polymer Properties

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Single‐Phase blends of polycarbonate and poly(phenyl methacrylate)

Cited by 7 publications

References 7 publications

Poly(phenyl methacrylate) and poly(1-naphthyl methacrylate) prepared in microemulsions

Poly(phenyl methacrylate) and poly(1-naphthyl methacrylate) prepared in microemulsions

Solvent-Induced Crystallization and Interaction Parameter of the Blends of Bisphenol A Polycarbonate and Poly(phenyl methacrylate)

Miscible Polymers

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