Enhanced home compostability of Poly(L-lactic acid) through blending Amorphous Polyhydroxyalkanoate
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Although poly(L-lactic acid) (PLLA) is widely used due to its favorable properties, such as cost-effectiveness and excellent mechanical characteristics among biodegradable polymers, it possesses a drawback of being unable to decompose under typical home composting conditions. To tackle this limitation, researchers have investigated the blending of PLLA with amorphous polyhydroxyalkanoate (aPHA) to enhance the biodegradability of PLLA in home compost settings. The introduction of aPHA into the blend affects the crystallization of PLLA by inducing microphase separation, resulting in a predominantly amorphous PLLA structure. Additionally, the microphase separation of these two polymers creates microfluidic channels facilitated by aPHA, effectively increasing the surface area accessible to microorganisms during composting. Consequently, both polymers undergo biodegradation more readily. Consequently, blending PLLA with aPHA shows promise in enhancing the biodegradability of PLLA and expanding its applications.