'New tailor-made biopolymers produced from lignocellulosic sugars waste for highly demanding fire-resistant applications'

Strategies to improve processability and mechanical properties of pure poly (3-hydroxybutyrate) (PHB)

Bacteria synthesized biopolyesters poly (3-hydroxybutyrate) P(3HB) homopolymer and the poly (hydroxybutyrate-co-valerate) (PHBV) copolymer have arisen on the last two decades as candidate materials for various applications. However, a wide introduction of PHB into different markets of application is not feasible due to various limitation of this material:
- Poor mechanical properties, which limit its use especially in applications that re-quire an improved impact behavior.
- Poor processability, due to a narrow processing window and tendency to degrade by hydrolytic chain scission when subjected to shear and high temperatures. [1]
- Particular crystallization behavior, very dependent on processing conditions and with a dramatic effect on the final properties.[2]
In order to achieve greater market penetrations of PHB it is of key importance to max-imize the properties of the material by means of effective and economically feasible strategies that generate an added-value. In this paper, different intrinsic characteristics of PHB have been optimized mainly by two different mechanisms of action:
- A suitable formulation has proved to efficiently improve PHB properties.
- Particular processing conditions contribute to the formation of distinct microscopic structures that determine macroscopic properties.

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» Author: Espert-Bernia, A. (AIMPLAS).

» Reference: 2nd International Conference on bio-based polymers and composites (BiPoCo). (2.2014.Barcelona).

» Publication Date: 25/08/2014

» Source: Espert-Bernia, A. (AIMPLAS).

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This project has received funding from the European Unionís Seventh Framework Programme for research, technological development and demonstration