Study on molecular movement and compatibility of polypropylene/polyester semi-interpenetrating polymer networks

The effects of reaction factors on the composition in network-modified poly propylene (PP) were studied. The chemical reaction between functionalized p olypropylene and polyester (PES) was characterized with infrared analysis. Phase separation between these two components is reduced as a result of the chemical crosslinks and physical entanglement. The mechanical properties o f the blends are improved due to the amelioration of compatibility. The res ult of ESR shows that 2A(zz) reaches its maximum value at a ratio of 87/13 for PP/PES. At the same time, the temperature at which fast movement of the molecule begins comes up to 290K.