Crystallization kinetics of poly(p-phenylene sulphide): the effect of branching agent content and endgroup counter-atom

López, Leonardo C.; Wilkes, Garth L.; Geibel, Jon F.

doi:10.1016/0032-3861(89)90395-9

Cited by 70 publications

(31 citation statements)

References 23 publications

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“…For PPS, depending on the molecular architecture (linear versus branched, crosslinked, molecular weight) and crystallinity, the glass transition typically occurs in the range 80°-95°C and the equilibrium melting temperature is typically in the range 298°-330°C. 25,42,43,50,51 (Note that this temperature range is higher than the observed DSC melting range, Tm = 280°-295°C.) This suggests that the maximum crystallization rate should be in the neighborhood of 180°-190°C.…”

Section: Crystallization Morphology and Kineticsmentioning

confidence: 99%

“…The value of n is a function of the nucleation and growth rate of the spherulites formed during crystallization. Most investigators have found values of n between 2 and 3 for PPS isothermal crystallization 24,25,35,36,[41][42][43]48,50,56 with crystallization from the melt giving values nearer 3 and cold crystallization giving values nearer 2. The values for crystallization from the melt have generally been interpreted to indicate three-dimensional growth of predetermined nuclei.…”

Section: Overall Rate Of Crystallizationmentioning

confidence: 99%

“…Lopez et al 43 also studied the effect of chain branching and end-group counter-atom. They found that branching, produced by the addition of a branching agent during polymerization, decreased the crystallization rate, nucleation density and heat of crystallization (crystallinity).…”

Section: Overall Rate Of Crystallizationmentioning

confidence: 99%

“…Many investigators [23][24][25]35,36,[39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][56] studied the crystallization kinetics of PPS and its composites. Most of these studies were reviewed previously, 3,6 so the approach taken here will be an overview of the most important observations.…”

Section: Crystallization Morphology and Kineticsmentioning

confidence: 99%

See 3 more Smart Citations

A Review of the Measurement and Development of Crystallinity and Its Relation to Properties in Neat Poly(phenylene Sulfide) and Its Fiber Reinforced Composites

Spruiell¹

2005

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Section: Crystallization Morphology and Kineticsmentioning

confidence: 99%

Section: Overall Rate Of Crystallizationmentioning

confidence: 99%

Section: Overall Rate Of Crystallizationmentioning

confidence: 99%

Section: Crystallization Morphology and Kineticsmentioning

confidence: 99%

See 2 more Smart Citations

A Review of the Measurement and Development of Crystallinity and Its Relation to Properties in Neat Poly(phenylene Sulfide) and Its Fiber Reinforced Composites

Spruiell¹

2005

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“…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][2][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.…”

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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Nonisothermal crystallization of poly(phenylene sulfide) in presence of molten state of crystalline polyamide 6

Mai¹,

Zhang²,

Zeng³

1999

J. Appl. Polym. Sci.

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ABSTRACT:The nonisothermal crystallization and melting behavior of a poly(phenylene sulfide) (PPS) blend with polyamide 6 (PA6) were investigated by differential scanning calorimetry. The results indicate that the crystallization parameters for PPS become modified to a greater extent than those for PA6 in the blends. The PPS and PA6 crystallize at high temperature as a result of blending. The crystallization temperatures of PPS in its blends are always higher than that of pure PPS and are independent of the melting temperature and the residence time at that temperature. The PPS crystallization peak becomes narrower and the crystallization temperature shifts to a higher temperature, suggesting a faster rate of crystallization as a result of blending with PA6. This enhancement in the nucleation of PPS could be attributed to the possible presence of interfacial interactions between the component polymers to induce heterogeneous nucleation. On the other hand, the increase in the crystallization temperature of PA6 can be attributed to the heterogeneous nucleation provided by the already crystallized PPS. The heterogeneous nucleation induced by interfacial interactions depends on the temperature at which the polymers remain in the molten state and on the storage time at this temperature.

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Crystallization kinetics of poly(p-phenylene sulphide): the effect of branching agent content and endgroup counter-atom

Cited by 70 publications

References 23 publications

A Review of the Measurement and Development of Crystallinity and Its Relation to Properties in Neat Poly(phenylene Sulfide) and Its Fiber Reinforced Composites

A Review of the Measurement and Development of Crystallinity and Its Relation to Properties in Neat Poly(phenylene Sulfide) and Its Fiber Reinforced Composites

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

Nonisothermal crystallization of poly(phenylene sulfide) in presence of molten state of crystalline polyamide 6

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