Investigating the Effect of Crystallinity on PVDF-PMMA Polymer Blend and Analyzing its Dielectric and Piezoelectric Performance

Pabitro Prosad Mondal; Abdullah Bin Asif; Rounak Jarin Turna; Adiba Tarannum; Md. Emdadul Hoque

doi:10.38032/scse.2026.4.211

Authors

Pabitro Prosad Mondal Department of Materials Science & Engineering, Rajshahi University of Engineering & Technology, Rajshahi-6204, Bangladesh
Abdullah Bin Asif Department of Materials Science & Engineering, Rajshahi University of Engineering & Technology, Rajshahi-6204, Bangladesh
Rounak Jarin Turna Department of Materials Science & Engineering, Rajshahi University of Engineering & Technology, Rajshahi-6204, Bangladesh
Adiba Tarannum Department of Materials Science & Engineering, Rajshahi University of Engineering & Technology, Rajshahi-6204, Bangladesh
Md. Emdadul Hoque Department of Mechanical Engineering, Rajshahi University of Engineering & Technology, Rajshahi-6204, Bangladesh

DOI:

https://doi.org/10.38032/scse.2026.4.211

Keywords:

PVDF, PMMA, Blend, Crystallinity, Dielectric

Abstract

In this study, a binary polymer blend using Polyvinylidene fluoride (PVDF) and Polymethyl methacrylate (PMMA) were prepared by simple solution casting method. PVDF having good dielectric and piezoelectric properties are in huge demand for applications like energy storage, sensors, actuators. To examine the changes in PVDF’s properties resulting from polymer blending, three different blends were prepared using 20%, 30% and 40% PMMA. Using XRD and FTIR the changes in alpha(α) and beta(β) phases of PVDF for different PMMA percentages were analyzed. It was seen that, β-phase of the blend increases up to 30% PMMA and starts to decrease after that and for 30% PMMA the β-phase content was higher than other samples. From FTIR spectrum, the calculated highest and lowest β-phase content was 63.6% and 53.3% for 30% and 20% PMMA respectively. The piezoelectric coefficient (d₃₃ value) was higher for high PVDF content and decreased as the PMMA content increased. With 20% PMMA, the d₃₃ value was 14.8 pC/N. Maximum dielectric constant was observed for 30% PMMA sample and with the PMMA percentage increment, lower dielectric loss was observed.

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