Journal ArticleDOI
The crystallinity of poly(phenylene sulfide) and its effect on polymer properties
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TLDR
In this paper, an approximate degree of crystallinity, termed crystallinity index (Ci), could be readily assigned based on x-ray measurements, based on which a poly(phenylene sulfide) molding with very low surface crystallinity was obtained.Abstract:
The crystallinity and crystallizability of poly(phenylene sulfide) have been examined by a number of common techniques. Several provided qualitative information, but only one, x-ray diffraction, was considered sufficiently reliable and reproducible to allow quantitative comparisons. Based on x-ray measurements, an approximate degree of crystallinity, termed crystallinity index (Ci), could be readily assigned. According to this method, virgin polymer possesses significant crystallinity (Ci ≈ 65%). Curing (crosslinking) the resin below its melting point did not change the crystallinity but did affect the crystallizability. Lightly cured resin suitable for molding and film extrusion was easily quenched from the melt to give amorphous polymer. The amorphous samples crystallized rapidly when heated to temperatures > 121°C (250°F). At mold temperatures below 93°C (200°F), moldings with very low surface crystallinity were produced. Annealing (204°C, 400°F) caused rapid crystallization of such moldings, and changes in crystallinity were correlated with observed changes in physical properties. The resin crystallizes so rapidly that these quenched moldings possessed a crystallinity gradient, the internal crystallinity being substantially greater. At high mold temperatures (121–204°C, 250–400°F), moldings very similar to fully annealed specimens were obtained.read more
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Journal ArticleDOI
Nondestructive determination of crystallinity by diffuse reflectance FT-IR in composites made from polyphenylene sulphide and carbon fibres
TL;DR: In this paper, a non-destructive determination of the degree of crystallinity at the surface of composite materials made from polyphenylene sulphide reinforced with carbon fibres was performed using Diffuse reflection Fourier transform infrared spectroscopy.
Journal ArticleDOI
Curing Behaviour of Poly-(1,4-phenylene sulphide) with Quinones
TL;DR: In this article, the curing reaction of poly-(1,4-phenylene sulphide) (pps) with tetrachlorobenzoquinone (chloranile), quinhydrone and antraquinone are studied by X-ray diffraction differential scanning calorimetry, Fourier transform infrared spectroscopy and thermo-gravimetric analysis.
Entwicklung thermoplastischer Faserkunststoffverbunde aus carbonfaserverstärkten PPS/PES-Blends
TL;DR: In this paper, the authors focus on the Herstellung thermoplastischer Blends aus Polyphenylensulfid (PPS) and Polyethersulfon (PES) in FKV-Strukturen.
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Hydrolytic Stability of Polyphenylene Sulfide/Polyarylate Blends
TL;DR: In the immiscible blends of poly(phenylene sulfide) (PPS) and polyarylate (PAR), absorbed moisture partitioned into each phase according to the equilibrium value of the homopolymers as mentioned in this paper.
Journal ArticleDOI
Effects of modified palygorskite on performance, crystallization and rheology of polyphenylene sulfide
TL;DR: In this paper , 3O4/polyphenylene sulfide (PPS) nanocomposites were used for X-ray diffraction and Fourier transform infrared spectroscopy (FTIR) analysis.