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Besides PHB, its copolymers with diverse ratios of hydroxyvalerate (HV) which are known as polyhydroxybutyrate-valerate (PHBV) are also extensively used.
A single species of bacteria converts corn and potato feedstocks into a copolymer of polyhydroxybutyrate (PHB) and hydroxyvalerate.
Poly (3-hydroxy butyrate-co-3-hydroxy valerate) (PHBV) with 5 mol% hydroxyvalerate content (PHB5V) was used in both white powder (trade name ENMAT Y1000) and pellet (Y1000P) forms as obtained from Tianan Biologic Materials Company, Ningbo, China.
1054--Thermal And Rheological Properties Of PHB Synthesized With Various Hydroxyvalerate Content For Potential Use In Food Packaging
Poly (3-hydroxyhuiviate-co-3-hydroxyvaletate) (PHBV) with 5% hydroxyvalerate content and trade name ENMAT Y1000 was obtained from Tianan Biologic Materials Company.
It was also reported that increasing the level of hydroxyvalerate comonomer in the copolymer led to reduced thermal degradation.
Even after cooling, PHBV with higher fractions of hydroxyvalerate (HV) units will be tacky to touch and the PHBV chains still remain in the amorphous state (8).
An increase in the hydroxyvalerate (HV) content in PHBV can reduce its degree of crystallinity and [T.