Abstract
Microcrystalline cellulose (MCC) offers great potential to improve the mechanical and crystallization properties of isotactic polybutene-1 (iPB) because of its low cost, biodegradability, renewability and excellent mechanical properties. However, the compatibility of polar MCC and non-polar iPB is poor. In this study, maleic anhydride grafted polybutene (MAPB) was prepared by the solution method and was used as a compatibilizer in the fabrication of iPB/MCC composites by using a twin screw extruder. The ultimate tensile strength, tensile modulus, flexural strength, flexural modulus of the iPB/MCC composites increased by 3.1%, 16.5%, 10.7%, 6.5%, respectively, compared with that of pure iPB. With MAPB addition, these values increased by 17.2%, 31%, 17.5% and 10%, respectively, compared with that of pure iPB. The heat-distortion temperature and thermal-decomposition temperature of all composites increased with an increased MCC content. The non-isothermal crystallization of the iPB/MCC composites shows that MCC addition can promote iPB crystallization, because the non-isothermal crystallization curve of the composites moves toward a higher temperature, especially after MAPB addition. Scanning electron micrographs indicate that the compatibility of the iPB/MCC has been enhanced significantly.
Highlights
Isotactic polybutene-1 is a semi-crystalline polymer, which has been used extensively in hot-water systems, heating systems, wires, cables and other industries. iPB has many excellent properties, such as an excellent heat, creep, pressure resistance [1,2]
maleic anhydride grafted polybutene (MAPB) was prepared by the solution method and its structure and properties were characterized by Fourier-transform infrared spectroscopy (FTIR) and elemental analysis. iPB/Microcrystalline cellulose (MCC)
The FTIR and elemental analysis results indicate that the Maleic anhydride (MAH) group was grafted onto the iPB molecular chain
Summary
Isotactic polybutene-1 (iPB) is a semi-crystalline polymer, which has been used extensively in hot-water systems, heating systems, wires, cables and other industries. iPB has many excellent properties, such as an excellent heat, creep, pressure resistance [1,2]. IPB has many excellent properties, such as an excellent heat, creep, pressure resistance [1,2]. Its high cost and slow crystallization rate limit its extensive use. The current filler that is used for iPB blending modification contains the inorganic and organic polymer filler. Iervolino et al [8] studied the crystallization behavior of Polymers 2018, 10, 393; doi:10.3390/polym10040393 www.mdpi.com/journal/polymers iPB/multi-walled carbon nanotube (MWNT) composites. The tensile strength and elongation at break of the blends decreased, but the impact and flexural properties were improved by PP addition. This technology resolves the problem of the iPB expense, but the crystallization properties of the iPB remain unchanged. The sourcing of a cheap and biodegradable fiber could theoretically reduce the price and improve the iPB performance
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