PREPARATION OF MALEATED POLYBUTYLENE ADIPATE-co-TEREPHTALATE AS A COMPATIBILIZER FOR POLYBUTYLENE ADIPATE-co-TEREPHTALATE /THERMOPLASTIC STARCH BLENDS

Nguyễn Châu Giang; Vũ Minh Đức

doi:10.34238/tnu-jst.12913

PREPARATION OF MALEATED POLYBUTYLENE ADIPATE-co-TEREPHTALATE AS A COMPATIBILIZER FOR POLYBUTYLENE ADIPATE-co-TEREPHTALATE /THERMOPLASTIC STARCH BLENDS

About this article

Received: 29/05/25 Revised: 28/06/25 Published: 28/06/25

Authors

1. Nguyen Chau Giang , School of Material Science and Engineering - Hanoi University of Science and Technology
2. Vu Minh Duc, School of Material Science and Engineering - Hanoi University of Science and Technology

Abstract

Maleated poly(butylene adipate-co-terephthalate) could be utilized as a compatibiliser for a blend of poly (butylene adipate-co-terephthalate) and thermoplastic starch as the maleic anhydride units grafted on the poly (butylene adipate-co-terephthalate) chain can form a strong chemical bond with the hydroxyl group of thermoplastic starch, resulting in a reduction of interfacial tension between these two immiscible phases. This work focuses on investigating the simultaneous impacts of maleated poly(butylene adipate-co-terephthalate) synthesis conditions on grafting reaction efficiency. The grafting reactions were performed with dicumyl peroxide as an initiator with concentration varied from 0.25 to 0.75 wt% at each given maleic anhydride content of 3.0, 5.0 and 6.0 wt%. The molecular structure of the maleated poly(butylene adipate-co-terephthalate) was confirmed using Proton Nuclear Magnetic Resonance, water contact angle measurements and the degree of grafting was assessed using titration. Increasing dicumyl peroxide and maleic anhydride content leads to rising in degree of grafting, but side reactions may occur, which results in branching or chain scission of the poly(butylene adipate-co-terephthalate) chain. The produced maleated poly(butylene adipate-co-terephthalate) was found to be highly effective in improving interfacial adhesion of the poly(butylene adipate-co-terephthalate)/ thermoplastic starch (60/40 wt%) blend.

Keywords

Poly (butylene adipate-co-terephthalate); Maleated poly(butylene adipate-co-terephthalate); Thermoplastic starch; Cassava starch; Biodegradable polymer blend

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DOI: https://doi.org/10.34238/tnu-jst.12913

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