Study of the influence of plasticizers on the thermal and mechanical properties of poly(3‐hydroxybutyrate) compounds

Abstract

The influence of four types of plasticizers, dioctyl phthalate (DOP), dioctyl adipate (DOA), triacetyl glycerol (TAG) and polyadipate (PA), in the thermal and mechanical properties of Poly(3‐hydroxybutyrate) (PHB), a highly crystalline biodegradable polyester, was evaluated in this work. The plasticizers were introduced alone or mixtures of them, using concentrations that varied from 5 to 30% wt. Their influence in some important polymer parameters as Tg, Tm and degree of crystallinity, and on its mechanical behavior, elongation and tensile strain were investigated. The best results were obtained for the sample with 30% TAG and that one using a binary mixture of plasticizers PA 20% and TAG 10%.

Production and characterization of poly-3-hydroxybutyrate from crude glycerol by Bacillus sphaericus NII 0838 and improving its thermal properties by blending with other polymers

“…This ecological awareness impelled development of new, eco-friendly materials, especially for single-use plastic items. Polyhydroxybutyrate (PHB) is an alternative because it has similar biodegradability characteristics to those of conventional thermoplastics (Baltieri et al, 2003). However, use of PHB is limited because of its thermal instability, excessive brittleness, and high production cost compared with synthetic plastics (El-Hadi et al, 2002).…”

Sorbitol-plasticized chitosan/zeolite hybrid membrane for direct methanol fuel cell

“…DSC is the commonly used method for determination of chitosan's T g [49][50][51]. Herein, T g was determined by DSC in the second heating run to eliminate the influences of water and membrane processing [52,53]. The DSC trace of CS-25 membrane is presented in Fig.…”

Effect of plasticizers on thermal and physical properties of compression-moulded poly[(3-hydroxybutyrate)-co-(3-hydroxyvalerate)] films

“…Poly-hydroxybutyrate (PHB) is one the most widely studied PHAs [8,9]. The physical properties of PHB are often compared to those of isotactic polypropylene because they have similar melting points, degrees of crystallinity and glass transition temperatures [10,11].…”