Poly(p-phenylene sulphide)/liquid crystalline polymer blends. I. Miscibility and morphologic studies

Gabellini, G.; Moraes, Marta Bueno de; Bretas, Rosário Elida Suman

doi:10.1002/(sici)1097-4628(19960404)60:1<21::aid-app3>3.0.co;2-x

Cited by 12 publications

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“…The first group of PPS blends are formed with other high performance super-engineering plastics, such as polysulfone, 5 poly(ether sulfone) (PES) 6,7 and liquid crystalline polymers (LCPs), [8][9][10] which have thermal stability over 150 1C for long durations. It is reported that PPS blends having an amorphous polysulfone matrix (p50 wt% of PPS) show good tensile properties, but that blends having a PPS matrix (450 wt% of PPS) become brittle.…”

Section: Introductionmentioning

confidence: 99%

High performance reactive blends composed of poly(p-phenylene sulfide) and ethylene copolymers

Oyama

Matsushita

Furuta

2011

Polym J

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Poly(p-phenylene sulfide) (PPS) is a high performance polymer that has superior chemical resistance and heat stability, but its brittleness is a serious drawback for applications. The objective of this work is to improve the physical properties of PPS by incorporating a small amount of either poly(ethylene-ran-methylacrylate-ran-glycidyl methacrylate) (EMA-GMA) or poly(ethyleneran-glycidyl methacrylate)-graft-poly(methyl methacrylate) (EGMA-g-PMMA) by melt mixing under a high shear rate. It was demonstrated that the chemical reaction between PPS and EMA-GMA (or EGMA-g-PMMA) proceeded efficiently at the interface and that the domains of EMA-GMA (or EGMA-g-PMMA) were finely dispersed in the PSS matrix with size of ca 0.1-0.3 lm. The resultant copolymers formed at the interface contributed to a decrease in the interfacial tension and an increase in the interfacial adhesion so that the obtained PPS/EMA-GMA blends (or PPS/EGMA-g-PMMA blends) showed excellent mechanical properties, at the same time retaining high thermal stability. Polymer Journal ( , good electrical and electronic properties, good mold precision, and high stiffness and modulus (tensile modulus¼2600-3900 MPa). 1 The semi-crystalline PPS has a T g of 88-93 1C, T m of 280-285 1C and an equilibrium melting point of its orthorhombic crystals at 303-350 1C. 1-3 Furthermore, PPS shows extraordinary flame retardance, having a limited oxygen index of 44%, which belongs to the highest group among polymeric materials together with poly(vinyl chloride) and polyimide. 4 So taking advantage of these unique properties, PPS has been applied as an alternative material for metals and thermoset polymers; for example, automobile parts and electrical and electronics parts. 1 However, its low toughness and high brittleness, which originate from its rigid structure, are serious drawbacks, preventing further applications.Thus, in order to improve the properties of PPS, blending of PPS has been intensively studied, and can be categorized into three groups. The first group of PPS blends are formed with other high performance super-engineering plastics, such as polysulfone, 5 poly(ether sulfone) (PES) 6,7 and liquid crystalline polymers (LCPs), 8-10 which have thermal stability over 150 1C for long durations. It is reported that PPS blends having an amorphous polysulfone matrix (p50 wt% of PPS) show good tensile properties, but that blends having a PPS matrix (450 wt% of PPS) become brittle. 5 It was found that PPS and PES are partially miscible, in which PES is also an amorphous polymer having excellent mechanical properties. 6 Although mechanical proper-

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Section: Introductionmentioning

confidence: 99%

High performance reactive blends composed of poly(p-phenylene sulfide) and ethylene copolymers

Oyama

Matsushita

Furuta

2011

Polym J

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“…Nevertheless, the resin has insufficient toughness and is brittle, which limits its application. In recent years, a great effort has been made to improve the above properties, therefore, blending and block copolymerization are necessary [2][3][4][5][6][7][8]. Poly(ether-sulfone) (PES) is an amorphous high-performance engineering plastic with good heat resistance and mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Tribological Properties of PTW/PTFE/PPS/PES Composites

Long

Li²,

et al. 2011

AMR

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Poly（phenylene-sulfide）/ Poly（ether-sulfone） polymer composites (coded as PPS/PES) reinforced by Potassium Titanate Whisker(PTW) and Polytetraﬂuoroethylene (PTFE) were prepared by compression molding. The effect of the filler on the mechanical and tribological properties of the PPS/PES composites was investigated, based on the evaluation of the composites’ properties and examination of the worn surfaces by means of scanning electron microscopy (SEM). Results showed that the incorporation of the PTW contributed to greatly increase the impact strength，tensile strength，and bending strength of the composites, and apparently improve its tribological performance. The composite had a best synthetical performance when the PTW content was about 20wt. %. The wear mechanism of the composites，which could be closely related to the content of PTW, gradually changed from adhesive wear to particle abrasion with the addition of PTW.

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“…Alguns estudos tem sido feitos na tentativa de melhorar suas propriedades mecânicas [3][4] , bem como na tentativa de torná-lo um polímero condutor [5][6] . Atualmente, o seu emprego vai desde o setor eletro-eletrônico, passando pelo automobilístico, de eletrodomésticos, petroquímico e de utensílios de cozinha.…”

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Estudos sobre a cinética de decomposição térmica do poli(sulfeto de fenileno)

Lage

Kawano

1999

Polímeros

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A cinética de decomposição térmica do poli(sulfeto de fenileno) (PPS) foi estudada através da termogravimetria (TG). Duas amostras comerciais de PPS foram utilizadas neste trabalho: Ryton, da Philips Petroleum, e Fortron, da Hoechst-Celanese. Os parâmetros cinéticos, isto é, a energia de ativação e o fator pré-exponencial de Arrhenius, foram calculados através de três métodos diferentes. Os resultados aqui apresentados concordaram com os dados da literatura. A estimativa do tempo de meia-vida do polímero também foi feita, mostrando que o Fortron é mais estável termicamente que o Ryton.

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Poly(p-phenylene sulphide)/liquid crystalline polymer blends. I. Miscibility and morphologic studies

Cited by 12 publications

References 0 publications

High performance reactive blends composed of poly(p-phenylene sulfide) and ethylene copolymers

High performance reactive blends composed of poly(p-phenylene sulfide) and ethylene copolymers

Mechanical and Tribological Properties of PTW/PTFE/PPS/PES Composites

Estudos sobre a cinética de decomposição térmica do poli(sulfeto de fenileno)

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