Elevated ductility, optical, and air barrier properties of poly (butyleneadipate‐co‐terephthalate) bio‐based films via novel thermoplastic starch feature

Abstract

It is important to develop high performances biodegradable polymers to eliminate the “white pollution” evoked by petroleum‐based polymer. Thermoplastic starch (TPS) with nano‐ellipse configuration was fabricated to reinforce the performances of poly (butylene adipate co‐terephthalate) (PBAT) biocomposites. Effects of tartaric acid (TA) (0.5% wt) on the structure of TPS and compatibility for PBAT were evaluated by Fourier‐transform infrared spectroscopy (FTIR), viscosity and rheological measurement, dynamic mechanical analysis (DMA) and scanning electron microscope (SEM), respectively. They revealed that TA reduced the molecular weight of starch and shear viscosity of TPS were beneficial for TPS dispersing in PBAT matrix with 184‐nm averaged diameter. PBAT/TPS‐TA (70:30 wt%) biocomposite films were blew with different blow‐up ratio. The morphology of films presented that nano‐TPS‐TA wrapped in the PBAT matrix and deformed from ball to capsule feature without agglomeration. Compared with those of PBAT film, the increment in elongation at break of PBAT/TPS‐TA film was 100%. The air permeability and UV‐VIS transmittance of PBAT/TPS‐TA films decreased from 6.92 × 10−9 to 3.72 × 10−9 cm3·cm·cm−2 s−1 Pa−1 and 47.6% to 23.5%, respectively. This study proposed a facile approach to fabricate low‐cost PBAT films with significant improved mechanical, optical, and air barrier properties for commercial application. Mechanism for nanoparticles of TPS‐TA motivated the elevated performances was proposed, synchronously.

Design and mechanism of controllable respiration polyamideamine‐epichlorohydrin modied sugarcane bagasse pith hemicellulose film

“…PAE resulted in higher TS values through causing a dense network structure through its crosslinking in the blend film system, which was in agreement with Obokata et al 14,16 who studied PAE‐containing sheets and observed that addition of PAE resulted in ester bond forming between PAE molecules and between PAE molecules and cellulose fibers with carboxyl groups and, as a result, an increase in tensile strength. At the same time, this was also consistent with the view of the existing reports, good compatibility, and uniform dispersion are important reasons for improving tensile properties 20 . Obviously, as the amount of PAE increases, the TS values of blend films rises and then decreases, and the elongation of samples decreases.…”

Preparation, characterization and properties of biodegradable poly(butylene adipate‐co‐butylene terephthalate)/thermoplastic poly(propylene carbonate) polyurethane blend films

“…From Figure 5A, a peak at low temperature was observed around −32.3°C, which was the glass‐transition temperature ( T g ) of poly (butylene adipate) (PBA) in PBAT and a small high temperature peak was observed around 63.6°C, which was the glass‐transition temperature ( T g ) of poly(butylene terephthalate) (PBT) in PBAT. Zhang et al 35 had reported the similar results about the two T g s of PBAT. The T g of PPCU was 11.4°C.…”

Ecofriendly Preparation and Characterization of a Cassava Starch/Polybutylene Adipate Terephthalate Film

“…However, due to the presence of ester groups, the degradation rate of PBAT is very slow and its price is relatively high, which limits its wide application in the market [8]. At present, starch is regarded as the best additive to reduce the price of PBAT and improve its degradability [9]. Mixing starch with PBAT can not only improve the mechanical properties and reduce material cost, but also improve the degradation performance of the material and broaden the application range of PBAT, which is of great research significance [10].…”