Properties of PP Wood-Plastic Composites with Biocompatibility Additives

Abstract:

Maleic anhydride grafted polypropylene compatibilizer (MAPP) and chitosan (CS) were mixed and used as a compound coupling agent to modify the PP matrix. 5 wt% NaOH and 10 wt% NaOH aqueous solution were used to treat corn stalk fiber (CSF), respectively. The effect of the complex coupling agent and the alkali treatment on the mechanical properties of CSF/PP composite was investigated. Morphological observation of the fracture surfaces was accepted to confirm CSF dispersion and wetting with the help of SEM. The results of the water absorption further demonstrated the binding of the interface between the CSF and the PP matrix. The wetting of the CSF in the PP was improved with the addition of the complex compatibilizer (5% MAPP + 5% CS). The formation of chemical bonding between the fiber and the matrix resulted in enhancing the interfacial compatibility between them. Compared with the pure PP, the flexural strength of 15-UT-5MAPPCS (63.14 MPa) and 15-UT-5MAPPCS (69.35 MPa) increased by 22.5% and 34.5%, respectively. The complex compatibilizer can replace alkaline treatment process to improve the mechanical properties of the composite.

• Periodical: Materials Science Forum (Volume 944)
• Pages: 509-514
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.944.509
• Online since: January 2019
• Authors: Shan Shan Liu, He Yi Ge, Yu Zou, Juan Chen*
• Keywords: Chitosan, Compatibilizer, MAPP, Polypropylene, Water Absorption

References

[1] H.Y. Cheung, K.T. Lau, T.P. Lu, D. Hui, A critical review on polymer-based bio-engineered materials for scaffold development, Compos. Part B-Eng. 38 (2007) 291-300.

DOI: 10.1016/j.compositesb.2006.06.014

[2] K.M. Xu, T.A. Chen, Z.F. Zheng, S.Y. Huang, K.F. Li, T.H. Zhong, Effects of Natural Chitosan as Biopolymer Coupling Agent on the Pyrolysis Kinetics of Wood Flour/ Polyvinyl Chloride Composites, Bioresources. 10 (2015) 4903-4912.

DOI: 10.15376/biores.10.3.4903-4912

[3] S.K. Chattopadhyay, R.K. Khandal, R. Uppaluri, A.K. Ghoshal, Bamboo fiber reinforced polypropylene composites and their mechanical, thermal, and morphological properties, J. Appl. Polym. Sci. 119 (2011) 1619-1626.

DOI: 10.1002/app.32826

[4] R.M. Silverstein, Spectrometric identification of organic compounds, John Wiley & Sons. 92 (2005) 3316.

[5] F. Hamid, S. Akhbar, K.H.K. Halim, Mechanical and Thermal Properties of Polyamide 6/HDPE-g-MAH/High Density Polyethylene, Proce. Eng. 68 (2013) 418-424.

DOI: 10.1016/j.proeng.2013.12.201

[6] E.C. Jr, U. Kopcak, M.C. Gonçalves, S.P. Nunes, In situ compatibilization of polyamide 6/natural rubber blends with maleic anhydride, Polymer. 41 (2000) 5929-5935.

DOI: 10.1016/s0032-3861(99)00800-9

[7] K. Jantanasakulwong, N. Leksawasdi, P. Seesuriyachan, S. Wongsuriyasak, C. Techapun, T. Ougizawa, Reactive blending of thermoplastic starch and polyethylene-graft-maleic anhydride with chitosan as compatibilizer, Carbohyd. Polym. 153 (2016) 89-95.

DOI: 10.1016/j.carbpol.2016.07.091