Effect of epoxy resin on the thermal behaviors and viscoelastic properties of poly(phenylene sulfide)

PCL‐based nanoclay (layered silicate) nanocomposites are prepared using a small scale intermeshing co‐rotating twin‐screw extruder. Improving the level of nanoclay dispersion in PCL nanocomposites is obtained by changing the extrusion parameters. Increasing the screw speed and decreasing the throughput leads to an improved dispersion quality, as observed from the improved mechanical properties of the nanocomposites as well as from their clearly affected rheological and crystallization behavior. Furthermore, a commercially available software that simulates the twin‐screw extrusion process (LUDOVIC) is used to asses the processing parameters applied for making the nanocomposites.

Section: Resultsmentioning

confidence: 99%

Optimization of Extrusion Parameters for Preparing PCL‐Layered Silicate Nanocomposites Supported by Modeling of Twin‐Screw Extrusion

Watzeels

Durme

Miltner

et al. 2012

“…The startup of steady shear flow experiments are conducted at two shear rate levels of

\overset{γ}{true}

= 0.001 (1/s) and 1 (1/s) (see Figure ). Wu et al carried out transient stress experiments on (polyphenylene sulfide/low melting point metal) composite and observed magnification in stress overshoot level by increasing the filler content 48. They ascribed this behavior to deformation of molten filler after imposed shear.…”

Section: Resultsmentioning

confidence: 99%

An Insight into Phenomenology of Polytrimethylene Terephthalate Fibrillation

Hajiraissi

2020

The objective of this work is to analyze the effect of the processing temperature on fibrillation of the dispersed phase and to correlate melt viscoelastic responses to formed morphologies. A blend system of polypropylene (PP)/polytrimethylene terephthalate (PTT) with varying ratios (PP/PTT: 99/1, 94/6, 90/10, and 80/20) is prepared on a co‐rotating twin screw extruder, and then pelletized blend samples are fed into a laboratory mixing extruder to spin monofilaments at three different orifice temperatures of 180, 195, and 240 °C. As revealed by scanning electron microscopy, a nano‐fibrillar morphology forms after employing spinning. Rheological approach performed in the linear region shows a transition from terminal trend into non‐terminal trend in the low‐frequency region when the fibrillar morphology forms, the magnitude and width of which are reflective of the fibril growth. Transient stress measurements prove its capability to enable the blend system to show potentials of morphology development during dynamic tests. Startup of steady shear flow shows that after reaching the percolation concentration of dispersed phase, fibril–fibril coalescence leads to the formation of long fibrils whose contribution to the blend system increases the elasticity of the blend fibers.

“…That is, viscoelastic materials have both elements of elastic and viscous materials. The viscoelastic response of PPS or PPS‐based materials has been studied over the past several decades . In this section, the principle purpose is focused on overviewing viscoelastic properties of PPS polymer materials.…”

Section: Pps—high‐performance Polymer/properties Of Ppsmentioning

confidence: 99%

“…Annealing of injection molded Izod bars was performed in a vacuum oven at temperatures of 160, 180, 200, and 220 °C with a constant annealing time at 4 h. The authors found an area of the increased endotherm with the increase in the annealing temperature. Similarly, thermal behaviors and viscoelastic properties of PPS/epoxy resin were studied, and the results showed that the epoxy resin can promote degradation and branching of PPS during melting mixing due to its poor thermal stability.…”

Section: Pps—high‐performance Polymer/properties Of Ppsmentioning

confidence: 99%

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

Zuo

Tcharkhtchi

Shirinbayan

et al. 2019

106

Poly (phenylene sulfide) (PPS) is one kind of high‐performance polymer with high thermal stability that can be used widely in different industrial domains. However, according to an investigation of the literature, few reviews have comprehensively focused on the continuous development of PPS applications in the past decade. To meet this demand, this paper provides an overall investigation of PPS polymer and PPS‐based composites from synthesis and process to applications. Briefly, this paper introduces PPS materials according to the following topics. First, the molecular weight distribution and morphology of PPS, as well as their reinforced parts, are introduced. Afterward, the topic is focused on the synthesis, process, and blending of PPS. In the next part, this paper investigates the key points regarding PPS as a high‐performance polymer, focusing on the aspect of thermal behavior and mechanical properties. Finally, PPS composite applications are emphasized and overviewed from a wide range of aspects.