Reactive Blending of Modified Thermoplastic Starch Chlorhexidine Gluconate and Poly(butylene Succinate) Blending with Epoxy Compatibilizer

Overview

Journal Polymers (Basel)

Publisher MDPI

Date 2023 Aug 26

PMID 37631544

Authors

Nanthicha Thajai

Pornchai Rachtanapun

Sarinthip Thanakkasaranee

Winita Punyodom

Patnarin Worajittiphon

Yuthana Phimolsiripol

Noppol Leksawasdi

Sukunya Ross

Pensak Jantrawut

Kittisak Jantanasakulwong

Affiliations

Soon will be listed here.

Abstract

Biodegradable starch-based polymers were developed by melt-blending modified thermoplastic starch (MTPS) with poly(butylene succinate) (PBS) blended with epoxy resin (Er). A modified thermoplastic starch blend with chlorhexidine gluconate (MTPSCh) was prepared by melt-blending cassava starch with glycerol and chlorhexidine gluconate (CHG) 1.0% wt. The Er was melt-blended with PBS (PBSE) at concentrations of 0.50%, 1.0%, 2.5%, and 5.0% (wt%/wt%). The mechanical properties, water resistance, and morphology of the MTPSCh/PBSE blends were investigated. The MTPSCh/PBSE2.5% blend showed an improvement in tensile strength (8.1 MPa) and elongation at break (86%) compared to the TPSCh/PBS blend (2.6 MPa and 53%, respectively). In addition, water contact angle measurements indicated an increase in the hydrophobicity of the MTPSCh/PBSE blends. Thermogravimetric analysis showed an improvement in thermal stability when PBS was added to the MTPSCh blends. Fourier transform infrared spectroscopy data confirmed a new reaction between the amino groups of CHG in MTPSCh and the epoxy groups of Er in PBSE, which improved the interfacial adhesion of the MTPSCh/PBSE blends. This reaction improved the mechanical properties, water resistance, morphology, and thermal stability of the TPSCh/PBSE blends.

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