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

Abstract

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-

Augmentation of performance properties of maleated SEBS/TPU blends through reactive blending

“…functionalized LDPE with maleic anhydride in order to reactively blend with PS functionalized with oxazoline . An attempt was made to improve the properties of poly( p ‐phenylene sulfide), a high performance polymer by incorporating EMA‐GMA or EGMA‐g‐PMMA . The favorable chemical reactions that proceeded at the interface resulted in uniform morphology, excellent mechanical characteristics as well as high thermal stability.…”

“…13 An attempt was made to improve the properties of poly(pphenylene sulfide), a high performance polymer by incorporating EMA-GMA or EGMA-g-PMMA. 14 The favorable chemical reactions that proceeded at the interface resulted in uniform morphology, excellent mechanical characteristics as well as high thermal stability. Many studies have been carried out investigating the nature of copolymers produced at the interface during reactive blending.…”

Overall Investigation of Poly (Phenylene Sulfide) from Synthesis and Process to Applications—A Review

“…These phenomena could be attributed to the structure of PPS which impedes the formation of upper melting crystals and the transformation of lower melting crystals into upper melting crystals. In addition, Oyama et al [147] studied the high-performance reactive blends containing PPS. They clarified that the reactive PPS blends showed good thermal stability up to 400 °C.…”

Microcellular foaming of poly(phenylene sulfide)/poly(ether sulfones) blends using supercritical carbon dioxide

“…However, PPS has a poor impact toughness due to the rigid backbone chain and high crystallinity, which significantly limits its uses in many applications . Blending with other toughened polymers such as poly(ether ether ketone) (PEEK), polyamide 66 (PA66), poly(ether imide) (PEI), poly(butylene terephthalate) (PBT), and ethylene copolymers is a very effective method to further improve the physical and mechanical properties, especially the impact toughness of PPS. Poly(ether sulfone) (PES) is an amorphous high‐performance engineering plastic with excellent thermal (high glass transition temperature) and mechanical (impact strength) properties.…”