Crystallization Behavior and Morphology of Hexadecylamine-Modified Layered Zinc Phenylphosphonate and Poly(Butylene Succinate-co-Adipate) Composites with Controllable Biodegradation Rates
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Hexadecylamine-modified zinc phenylphosphonate (m-PPZn) and biodegradable poly(butylene succinate-co-adipate) (PBSA) were melt mixed using a single-screw extruder. Experimental results of wide-angle X-ray diffraction (WAXD) and transmission electron microscopy revealed that the stacking layers of the m-PPZn were partially intercalated and partially exfoliated into the PBSA polymer matrix. The biodegradation rates of PBSA using lipase from Pseudomonas sp. increase as the contents of m-PPZn increase. The degree of crystallinity the lamellar thickness determined using WAXD and small-angle X-ray scattering data decrease as the loadings of m-PPZn increase. It is necessary to point out that the changes of degradation rate, the degree of crystallinity, and the lamellar thickness are almost linearly proportional to the loading of m-PPZn. This finding of composite materials with controllable degradation rate would provide an important information for the manufacturing PBSA nanocomposites used in biodegradable mulching films for agricultures.
KeywordsBiocomposites Degradation rate Crystallization Morphology
The work was supported by the Ministry of Science and Technology (MOST) under Grant MOST 104-2212-E-005-089-MY2 and the Ministry of Education under the project of Innovation and Development Center of Sustainable Agriculture (IDCSA).
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