Effect of Post-processing Annealing on Crystallinity Development and Mechanical Properties of Polyphenylene Sulfide Composites Printed on Large-format Extrusion Deposition System

Conference · Wed May 01 00:00:00 EDT 2019

DOI:https://doi.org/10.33599/nasampe/s.19.1589· OSTI ID:1559682

Kishore, Vidya  ^[1]; Chen, Xun ^[1]; Hassen, Ahmed  ^[1]; Lindahl, John  ^[1]; Kunc, Vlastimil  ^[1]; Duty, Chad ^[1]

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1. ORNL

This work investigates the effect of annealing on structure development and mechanical properties of parts printed on a large-format extrusion additive manufacturing system using short carbon fiber reinforced polyphenylene sulfide (PPS). PPS, being a semi-crystalline polymer, offers the potential to alter the mechanical properties of parts with changes in crystallinity. Annealing PPS at temperatures above the glass transition and below the melting point for long hours can enhance crystallinity in the material, thereby improving the mechanical properties. However, high temperature polymers such as PPS can also undergo reactions (branching and/or crosslinking) when annealed in an oxidative environment, which further influence crystallization. This work reports the effect of annealing on the changes in crystallinity, possibility of chemical reactions taking place, melt rheological properties and thermo-mechanical properties of the chosen PPS grades.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1559682
• Resource Relation: Conference: SAMPE 2019 Conference and Exhibition - Charlotte, North Carolina, United States of America - 5/20/2019 4:00:00 AM-5/23/2019 4:00:00 AM
• Country of Publication: United States
• Language: English