scispace - formally typeset
Search or ask a question
Author

S.G. Joshi

Bio: S.G. Joshi is an academic researcher from National Chemical Laboratory. The author has contributed to research in topics: Curing (chemistry). The author has an hindex of 1, co-authored 1 publications receiving 6 citations.

Papers
More filters
Journal ArticleDOI
TL;DR: In this article, internal structural changes in polyphenylene sulphide coatings have been investigated as a function of curing temperature by means of scanning electron microscopy, X-ray diffraction and IR spectroscopy.

6 citations


Cited by
More filters
Journal ArticleDOI
TL;DR: The first known report of its synthesis was by Grenvesse in 1898 [1] and interest in the synthesis of PPS only began in 1948 when Macallum 121 described the preparation of phenylene sulfide polymers by the melt reaction of p-dichlorobenzene with sodium carbonate and sulfur as mentioned in this paper.
Abstract: Among the various high temperature polymers, those based on aromatic units, such as poly(2, 6-dimethylphenylene oxide) (PPO), poly(pheny1ene sulfide) (PPS), poly(ether ether ketone) (PEEK), and poly(ether sulfone) (PES), have attracted much attention in the last few years due to their good thermal and chemical resistance. One of these polymers, PPS, is also an important high strength/high temperature engineering thermoplastic that is finding increasing use in technological applications such as molding resins, fibers, and matrices for thermoplastic composites. PPS consists of para-phenylene units alternating with sulfide linkages. The first known report of its synthesis was by Grenvesse in 1898 [1]. However, interest in the synthesis of PPS only began in 1948 when Macallum 121 described the preparation of phenylene sulfide polymers by the melt reaction of p-dichlorobenzene with sodium carbonate and sulfur. Further investigation on the synthesis of PPS by Lenz and coworkers [3–5], and later by Edmo...

89 citations

Journal ArticleDOI
TL;DR: In this paper, Fourier transform infrared (FTIR) spectroscopy was employed to examine poly(p-phenylene sulfide) (PPS) and the fundamental vibrations of PPS were assigned based on those of known para-substituted benzene modes.

43 citations

Book ChapterDOI
TL;DR: Poly(phenylene sulfide), PPS, has a long history in the chemical literature and commercial development activities began approximately 40 years ago, ultimately leading to the first commercial production of PPS in 1973.
Abstract: Poly(phenylene sulfide), PPS, has a long history in the chemical literature. Reported syntheses of PPS or PPS-related resins date back almost 100 years. Commercial development activities began approximately 40 years ago, ultimately leading to the first commercial production of PPS in 1973.

9 citations

Journal ArticleDOI
TL;DR: Differential scanning calorimetry (DSC) was used to investigate the solid-state cure process of poly(phenylene sulfide)(PPS) resin in this article, where either air or oxygen was used as a curing atmosphere.
Abstract: Differential scanning calorimetry (DSC) was used to investigate the solid-state cure process of poly(phenylene sulfide)(PPS) resin. Virgin PPS resin in an open sample pan was cured in DSC cell. Either air or oxygen was used as a curing atmosphere. Cure temperatures were in the range of 200 and 250 °C, which are below the melting point of PPS resin. Cure temperature as well as atmospheric condition influenced the cure behavior of PPS in the solid state. Both the rate and the amount of cure increased with increasing cure temperature. On the other hand, the time to reach the maximum cure rate was independent of cure temperature. Changing the atmosphere from air to oxygen increased both the cure rate and the amount of cure. The size effect of PPS particles on the cure reaction was also discussed.

8 citations

Reference EntryDOI
04 Dec 2000
TL;DR: In this article, the history, syntheses, and properties of poly(p-phenylene sulfide) (PPS) resins are reviewed. And significant areas where PPS resins were used are presented.
Abstract: Poly(p-phenylene sulfide) (PPS) is an important industrial thermoplastic material. This article reviews the history, syntheses (both laboratory and commercial), and properties of PPS. Characteristics such as thermal transition, thermal stability, rheology, solution viscometry, size-exclusion chromatography, UL temperature indexes, mechanical properties, chemical resistance, and electrical properties of neat PPS resin and reinforced PPS compounds, are all discussed. Significant areas where PPS resins are used are presented. Keywords: Poly(phenylene sulfide); Polymerization; Neat resins; Injection molding compounds; Electrical insulation; Thermal stability; Injection molding; Coatings; Compounds; Fiber; Composites; Films; Blends

5 citations