YANG Fengxia, DU Rongni, LI Bo, CHEN Long, YANG Jinghui, FU Qiang, ZHANG Qin. PROPERTIES OF PA1010/PP BLENDS MODIFIED BY REACTIVE COMPATIBILIZATION WITH POE-g-PMAH[J]. Acta Polymerica Sinica, 2010,(3):366-371.
YANG Fengxia, DU Rongni, LI Bo, CHEN Long, YANG Jinghui, FU Qiang, ZHANG Qin. PROPERTIES OF PA1010/PP BLENDS MODIFIED BY REACTIVE COMPATIBILIZATION WITH POE-g-PMAH[J]. Acta Polymerica Sinica, 2010,(3):366-371. DOI: 10.3724/SP.J.1105.2010.00366.
Polyamide/polypropylene (PA1010/PP) blends were prepared by melt mixing using maleic anhydride-grafted ethylene-octene copolymer (POE-g-PMAH) as a reactive compatibilizer.The compatibilizing effects of POE-g-PMAH on PA1010/PP blends were investigated by means of scaning electron microscopy (SEM)
mechanical testing
Fourier transform infrared spectroscopy (FTIR) and differential scaning calorimetry (DSC)
respectively. It was found that the addition of POE-g-PMAH could decrease the size of the dispersed PP particles
when the mass ratio of PA1010/PP/POE-g-PMAH = 70/30/15
the domains showed a fine and uniform dispersion in the matrix. FTIR results showed that the anhydride carbonyl groups of POE-g-PMAH reacted with the end groups of PA1010 in the blending process. DSC results showed that addition of POE-g-PMAH decreased the crystallization temperature and crystallinity of PA1010 and PP in the blends
indicating that POE-g-PMAH had an inhibition effect on the crystallization of PA1010 and PP. Mechanical testing indicated that with increasing the POE-g-PMAH content
the Izod impact strength of dried samples increased gradually
when the content of POE-g-PMAH was 15%
the Izod impact strength of dried samples was 21.13 kJ/m2
which is 3.1 times that for the binary PA1010/PP blend. Meanwhile
the flexural strength
tensile strength and modulus can be maintained at a relatively high level.The compatibilization mechanism of POE-g-PMAH lied in the chemical interactions occuring between the terminal amino groups of PA1010 and anhydride of MAH in POE-g-PMAH during the melt mixing
and the compatibility between PP and ethyleneoctene of POE in POE-g-PMAH. Hense the addition of POE-g-PMAH decreased the interfacial tension and the domain size dramatically