Polybutyrate

Abstract: The aim of this work was to develop new biodegradable polymeric materials with high loadings of chicken feather (CF). In this study, the effect of CF concentration and the type of biodegradable matrix on the physical, mechanical and thermal properties of the biocomposites was investigated. The selected biopolymers were polylactic acid (PLA), polybutyrate adipate terephthalate (PBAT) and a PLA/thermoplastic copolyester blend. The studied biocomposites were manufactured with a torque rheometer having a CF content of 50 and 60 wt %. Due to the low tensile strength of CFs, the resulting materials were penalized in terms of mechanical properties. However, high-loading CF biocomposites resulted in lightweight and thermal-insulating materials when compared with neat bioplastics. Additionally, the adhesion between CFs and the PLA matrix was also investigated and a significant improvement of the wettability of the feathers was obtained with the alkali treatment of the CFs and the addition of a plasticizer like polyethylene glycol (PEG). Considering all the properties, these 100% fully biodegradable biocomposites could be adequate for panel components, flooring or building materials as an alternative to wood–plastic composites, contributing to the valorisation of chicken feather waste as a renewable material.

Abstract: Fused deposition modelling is a common 3D printing technique used for the freeform fabrication of complex shapes based on polymers. Acrylonitrile butadiene styrene (ABS) is the common material option, though polylactide (PLA) has also proved to be a successful candidate. There is an ever increasing demand to harness new materials as possible candidates for fused deposition. The current research is focused on evaluating polybutyrate-adipate-terephthalate–polymer (PBAT) for fused deposition modelling. Both neat and composite PBAT filled with varying wood flour fillers were experimentally analyzed for 3D printing by extrusion from the pellet forms. The results are positive and the addition of small quantities of the wood flour filler material was found to improve the thixotropic nature of the polymer composite and consequently the inter-strand and inter-layer coalescence.

Abstract: The invention discloses a PBAT (polybutyrate adipate terephthalate) fully-biodegradable film composition and a preparation method thereof; film of the composition is not greater than 6 mm in thickness, greater than 40 MPa in transverse rupture strength, greater than 800% in elongation at transverse rupture, greater than 30 MPa in longitudinal rupture strength, and greater than 300% in elongation at longitudinal rupture; the magnitude of the rupture strength is not directional, and all transverse and longitudinal rupture strengths and elongations at transverse and longitudinal rupture are directional. The film acquired herein is fully biodegradable, has suitable service life, and is widely applicable to daily product packaging, express bags, heat-shrinking film, adhesive tapes, agricultural mulch and other aspects.

Abstract: The invention discloses a composition containing PBAT (polybutyrate adipate terephthalate) and a preparation method thereof as well as a PBAT preservative film. The composition containing PBAT comprises the following components by weight percent: 73-95 percent of the PBAT, 0.1-22 percent of modified nano calcium carbonate, 2-3 percent of a compatilizer, 0.1-2 percent of antioxygen and 0.1-2 percent of a lubricating agent. Through adding the modified nano calcium carbonate in the PBAT, the strength of the prepared material after forming a film through blowing molding is greatly improved; due to the adoption of the modified nano calcium carbonate, the cost is reduced, the cost performance is increased; a material containing the PBAT, which is high in cost performance, good in processing performance and better in opening property and a preservative film produced on the basis of the material are prepared.