Effect of Compatibilizer on Morphology and Performance of PP/PA6 Microfibrillar Composites

doi:10.19491/j.issn.1001-9278.2021.05.001

Abstract

Abstract:

Polypropylene （PP）/Polyamide 6 （PA6） microfibrillar composites were prepared by melt extrusion-hot stretching with maleic anhydride-grafted PP （PP-g-MAH） as a compatibilizer， and their phase morphology and crystallization， rheological and tensile properties were investigated. The results indicated that the addition of 0.5 % PP-g-MAH （mass fraction） was beneficial to the formation of PA6 microfibrils with a high aspect ratio. A further increase in the content of PP-g-MAH improved the interfacial compatibility but hindered the formation of the microfibrils. The PP/PA6 microfibrillar composites containing 0.5 % PP?g?MAH presented a strong elastic response in terms of the dynamic rheological properties， leading to an obvious improvement in the crystallization and tensile properties of microfibrillar composites.

Key words: polypropylene, polyamide 6, in-situ microfibrilar composite, maleic-anhydride-grafted polypropylene, melt extrusion-hot stretching

CLC Number:

TQ325.1⁺4

WANG Yu, SUN Wenjie, MA Yulu, XIE Linsheng, JI Huajian. Effect of Compatibilizer on Morphology and Performance of PP/PA6 Microfibrillar Composites[J]. China Plastics, 2021, 35(5): 1-5.

Figures/Tables 5

Fig.1. SEM of PP/PA6/PP?g?MAH microfibrillan composites

Fig.2. Dynamic frequency sweeps of PP/PA6/PP?g?MAH microfibrillar composites

Fig.3. DSC curves of PP/PA6/PP?g?MAH microfibrillar composites

PP/PA6/PP?g?MAH 的质量比	T₀/℃	T_p/℃	X_c/ %	T_m/℃
100/0/0	126.51	117.94	38.56	163.35
85/15/0	127.62	123.39	48.04	165.13
84.5/15/0.5	135.23	127.62	52.32	166.60
83.5/15/1.5	134.77	127.16	50.33	166.23
82/15/3	131.75	125.44	48.26	165.76

Tab.1. Non?isothermal crystallization and melting parameters of PP/PA6/PP?g?MAH microfibrillar composites

Fig.4. Tensile strength of PP/PA6/PP?g?MAH microfibrillar composites

References 11

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