Mechanically Robust and Highly Elastic Thermally Induced Shape Memory Polyurethane Based Composites for Smart and Sustainable Robotic Applications | [First International Conference on Revamped Scientific Outlook of 21st Century (Abstract Book) • 2022]

Author(s):

1. Naveed Ahmed: Department of Chemistry, Hazara University,Mansehra, Khyber Pakhtunkhwa,Pakistan, School of Packaging, Michigan State University,Michigan,USA

Abstract:

In the present study, polyurethane (PU) was prepared using a pre-polymer method two-shot process with novel phloroglucinol chain extender. PU nanocomposite was prepared by incorporating acid-FMWCNTs in pristinePU. Polystyrene (PS) was functionalized with the nitro group through our previously reported method. Nitrofunctionalized polystyrene (PS-NO2) was used to induce physical interaction (crosslinked physically interpenetrating networks) between polyurethane and PS-NO2 between both polymer layers. The ternary blend composites (PU/PSNO2/FMWNTs) were also synthesized using acid functionalized multiwall carbon nanotubes (FMWCNTs). Nitrofunctionalized polystyrene/polyurethane blend/composite properties were compared with neat polyurethane and its nanocomposite. Structure of the pre-designed PU polymer and its composites were confirmed by the FTIR and degree of crystallinity and amorphous structure was determined with XRD. The TGA was performed to study thermal behaviour and thermal stabilities of synthesized blends. Excellent thermal stabilities were confirmed through TGA thermogram with increase in loading concentration of FMWCNTs. Excellent tensile strength 59.2 ± 2.6 MPa with 0.1g loading amount of FMWCNTs with enhanced flexibilities were observed, all the sample showed enhanced tensile strength with increase in loading amount and sufficient incorporation of FMWCNTs in polymer matrices. The significant change in surface morphologies and porosity suggested enhanced interaction (physical and chain entanglement) of FMWCNTs and nitrated-polystyrene with PU chain. The porous spongy cluster provides efficient shape recovery with excellent flexibility to the composite material with excellent thermal stabilities and mechanical properties with excellent repeatability. Almost 100 percent shape recovery was observed for all samples. Recovery time of polyurethane nanocomposite observed is shorter than neat polyurethane and PU/PS-NO2 blends because of better conductive nature.

Page(s): 0-0

DOI: DOI not available

Published: Journal: First International Conference on Revamped Scientific Outlook of 21st Century (Abstract Book), Volume: 0, Issue: 0, Year: 2022

Keywords:

Composite , Polyuerthane , Shapememory , Robotics

References:

References are not available for this document.

Citations

Citations are not available for this document.

Citations

Downloads

Views