Modification of Poly lactic acid by free radical reaction: crystallization behavior

Polylactic acid (PLA) was modified using dicumyl peroxide (DCP) and triallyl isocyanurate (TAIC) by free radicals reaction. DCP was used as initiator and TAIC as co-agent for formation long chain branching (LCB) of PLA. The modified PLA samples were characterized by fourier transform infrared spectrometry (FTIR), so the thermal properties of samples was evaluated by differential scanning calorimetry (DSC). It was observed that degree of crystallinity increased for the samples content DCP and TAIC, because branched chains can act as nucleating site. The topological structures of LCB was investigated by gel fraction chromatography (GPC) and rheology. The results showed the LCB of PLA created at a very low content of either DCP or TAIC

کلیدواژه ها:

Poly(lactic acid) ، Long chain branching ، Crosslinking ، DCP ، TAIC