The effect of maleic anhydride (MAH) and maleic anhydride grafted polypropylene (PP-2) on the structure and performance of biodegradable non-woven fabric slices of poly(propylene carbonate) (PPC)/ polypropylene (PP) was investigated by melt blending process.FTIR spectra showed that ring-opening reaction happened between the anhydride functional groups of MAH and PP-2 and PPC.The tensile strength of the slices were increased by 116% and 101% respectively with adding 1% MAH or 2% PP-2.This indicates that the tensile strength of the slices can be significantly increased by adding MAH or PP-2.The adding of MAH or PP-2 decreased the melt flow rate

increased the intrinsic viscosity

glass transition and thermal decomposition temperatures and also expanded the temperature ranges for using and processing the slices.The glass transition temperature (Tg) of the slices was increased 4 K by adding 1% MAH.The 5% weight loss temperatures (T_5%) of the slices were increased 40 ℃and 20 ℃

respectively by adding 1% MAH or 2% PP-2.The SEM results of the slices showed that internal depressions and cavities were decreased by adding MAH or PP-2.The adding of PP-2 can improve the compatibility of the slices more significantly than MAH.The 30 days degradation rates of PPC and PP were 4.30% and 0%

PP was not degraded in phosphate buffer solution.The 30 days degradation rate of the slices with additives was higher than 3.80%

this indicated that the non-woven fabric slices of PPC/PP prepared by melt blending process were biodegradable and environment-friendly.Ring-opening reaction

increasing interface adhesion force and reducing interfacial tension maybe the mechanisms of the additives.