Phase separation in semicrystalline blends of poly(phenylene sulfide) and poly(ethylene terephthalate). II. Effect of poly(phenylene sulfide) homopolymer solubilization of PPS-graft-PET copolymer on morphology and crystallization behavior

Hanley, Stephen J.; Nesheiwat, Afif M.; Chen, Rong T.; Jamieson, Madge; Pearson, Raymond A.; Sperling, L. H.

doi:10.1002/(sici)1099-0488(20000215)38:4<599::aid-polb12>3.3.co;2-2

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“…PPS is not soluble in any solvent under 200°C and usually forms immiscible two‐phase blends 24–39 except for those prepared under very high shear rates 40 . The crystallization behavior of PPS has been extensively studied, with most of the kinetic studies carried out using differential scanning calorimetry (DSC) in nonisothermal crystallization during cooling from the molten state.…”

Section: Introductionmentioning

confidence: 99%

“…The crystallization behavior of PPS has been extensively studied, with most of the kinetic studies carried out using differential scanning calorimetry (DSC) in nonisothermal crystallization during cooling from the molten state. It is reported that crystallization of PPS is accelerated by blending with poly(ethylene terephthalate) (PET), 24,25 liquid crystalline polymer (LCP), 26 poly(ether ether ketone) (PEEK), 27,28 polyamide 6 (PA6), 29 polyamide 66 (PA66), 30,31 poly(ether sulfone) (PES), 32,33 and polyimide 34 . In contrast, crystallization of PPS is decelerated by blending with high density polyethylene, 22 large amounts of PES, 32,35,36 polycarbonate (PC), 4 high impact polystyrene (HIPS), 37 and poly(phenylsulfone) (PPSU) 38 .…”

Section: Introductionmentioning

confidence: 99%

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Control of crystallization in two‐phase blends of poly(phenylene sulfide) and poly(vinylpyrrolidone)

Nara

Watanabe

Oyama

et al. 2020

Polymer Crystallization

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This paper reports for the first time the use of poly(N‐vinylpyrrolidone) (PVP) as an effective additive for controlling the melt crystallization behavior of poly(p‐phenylene sulfide) (PPS). The PPS/PVP blends form two‐phases, whose melt crystallization temperature decreases drastically upon the addition of PVP accompanied by a delayed onset of crystallization and a decreased crystallization rate. Monitoring spherulite growth during isothermal annealing revealed that in blends with less than 5 wt% of PVP the diminution of the crystallization rate of PPS is due to a decrease in both the nucleation rate and the spherulite growth rate, whereas in blends with higher PVP content the falloff in rate is mainly caused by slow nucleation. A change was observed in the glass transition temperature and melting temperature of PPS upon blending, suggesting that the blends are partially miscible. The delay in crystallization is likely due to the partial miscibility disturbing exclusion of PVP from the crystalline growth front.

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Section: Introductionmentioning

confidence: 99%