Polyhydroxybutyrate matrix

It is known that PLA forms miscible blends with polymers such as PEG [53]. PLA and PEG are miscible with each other when the PLA fraction is below 50 per cent [53]. The PLA/PEG blend consists of two semi-miscible crystalline phases dispersed in an amorphous PLA matrix. PHB/PLA blends are miscible over the whole range of composition. The elastic modulus, stress at yield, and stress at break decrease, whereas the elongation at break increases, with increasing polyhydroxybutyrate (PHB) content [54]. Both PLA/PGA and PLA/PCL blends give immiscible components [55], the latter being susceptible to compatibilization with P(LA-co-CL) copolymers or other coupling agents. 

D.W. (2005) Novel and economical purification of recombinant proteins Intein-mediated protein purification using in vivo polyhydroxybutyrate (PHB) matrix association. Protein Sci., 14, 1387-1395. 

As a polymeric matrix in work used polyhydroxybutyrate (PHB) bio decomposed polymer. Thanking these properties PHB it is applied as packing, to the biomedical appointment, self-resolving fibers and films, etc. 

Natural biological composites, with cellulose as reinforcement and bacteria-produced polyhydroxybutyrate (PHB) as a matrix, were manufactured by compounding and injection molding. Such materials are totally biodegradable. 

Figure 6 shows an SEM micrograph of the tensile fracture surface of a composite containing 40% cellulose and polyhydroxybutyrate as a matrix. Among the observations are good adhesion, no debonding and fractured fibers. 

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