An Investigation of the Effect of Chitosan on Isothermal Crystallization, Thermal Decomposition, and Melt Index of Biodegradable Poly(L-lactic acid)

摘要: Biodegradable chitosan (CS) was introduced into another biodegradable poly(L-lactic acid) (PLLA) to prepare the PLLA/CS composites, and effect of CS on thermal behavior melt index PLLA investigated using modern testing technologies including optical depolarizer, thermogravimetric analysis instrument, instrument. The relevant results showed that both crystallization temperature concentration affected isothermal PLLA. Compared neat PLLA, t1/2 PLLA/5% decreased from 2991.54 s minimum value 208.76 s at 105°C. However, composites in high zone different low zone. increase heating rate made decomposition shift higher temperature. indicated 3% fluidity become better.