Technical Paper Archive

This site contains all papers presented at Rubber Division, ACS Technical Meetings from 2000-2018. Meetings prior to 2000 are incomplete and papers are added as they are digitized.

For older papers not listed here, please send your request, including Meeting Year, Title, Author, and Paper # to:

View Your Rubber Division Account

Understanding Polyvinylidene Fluoride based Thermoplastic Elastomeric Blends: A Combined Simulation and Experimental Study

D18 saha bhowmick

Event: 200th Technical Meeting - Fall 2021
Location: Pittsburgh, PA
Date: October 05, 2021
Author: Subhabrata Saha
Paper Number: D18

Price: $20.00

  • The choice of constituent polymers depending on their compatibility is crucial in developing a thermoplastic elastomeric blend (TPE). Computer-aided simulation could be an attractive tool for the initial screening of the components, as the method can compensate both time and cost. However, such studies are scarce for TPEs. In this thought, we have considered two different TPEs composed of polyvinylidene fluoride (PVDF)/fluoroelastomer (FKM) and PVDF/acrylate rubber (ACM), both having 30:70 (wt./wt.) plastic:rubber ratio, for theoretical understanding by using computer simulation. Two glass transition temperatures (Tgs) were predicted from the molecular dynamics (MD) simulation, which defined immiscibility of the components in both the TPEs. However, thermodynamic energy of mixing and intermolecular radial distribution function suggested higher compatibility between PVDF/ACM as compared to the PVDF/FKM. Dissipative particle dynamics (DPD) simulation delineated the thicker interphase region for PVDF/ACM TPE due to higher interaction between the components. The above interpretation about these TPEs showed a good agreement with the experimental analysis obtained from the dynamic mechanical (DMA), thermal and microscopic studies. For example, after the blending, the Tg of ACM phase (-11 °C obtained from DMA) in the PVDF/ACM TPE shifted 5 °C towards the Tg of the PVDF phase, whereas no shift was observed for the FKM phase in PVDF/FKM TPE. Further, the PVDF/ACM TPE exhibited a distinctly higher elongation at break (~250 %) compared to PVDF/FKM (~100%). These experimental results illustrated better compatibility between PVDF/ACM in comparison to PVDF/FKM, as predicted by the simulation method acquired in this work.

    Papers from 200th Technical Meeting - Fall 2021

    Items from 200th Technical Meeting - Fall 2021