Abstract
Rice husk–Polypropylene (RH–PP) composites were prepared using four level of filler loadings (10, 20, 40 and 50%) incorporating maleic anhydride grafted Polypropylene (MAPP) and m-isopropenyl α–α-dimethylbenzyl-isocyanate grafted Polypropylene (m-TMI-g-PP) coupling agents. Mechanical properties of the composites indicated that m-TMI-g-PP coupling agent performed better than that of MAPP. Tensile and flexural properties of composites prepared with coupling agents were found to be superior to controlled samples. However, Impact strength of the composites decreased with increasing filler loadings in all the composites. Fourier transform infra red (FTIR) spectroscopy of the composites revealed effective coupling between rice husk and polypropylene. Scanning electron microscopy indicated improved adhesion between rice husk and Polypropylene in case of coupled composites. Thermal stability of pure PP was higher than that of rice husk and RH–PP composites. Use of coupling agent had no significant effect on thermal stability of the composites.
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References
Aggarwal PK, Raghu N, Karmarkar A, Chauhan S (2013) Jute polypropylene composites using m-TMI-grafted-polypropylene as a coupling agent. Mater Des 43:112–117
Ashori A, Nourbakhsh A (2009) Mechanical behavior of Agro-residue-reinforced polypropylene composites. J Appl Polym Sci 111:2616–2620
ASTM D 790-92 (1995) Standard test method for Flexural properties of unreinforced and reinforced plastics and electrical insulating materials. ASTM, Philadelphia, PA
ASTM D 256-93 (1995) Standard test method for impact resistance of plastics and electrical insulating materials. ASTM, Philadelphia, PA
ASTM D638-94b (1995) Standard test method for tensile properties of plastics. ASTM, Philadelphia, PA
Bledzki AK, Gassan J (1999) Composites reinforced with cellulose based fibers. Prog Polym Sci 24(2):221–274
Dimzoski B, Bogoeva-Gaceva G, Gentile G, Avella M, Grozdanov A (2009) Polypropylene based Eco-composites filled with agricultural rice hulls waste. Chem BiochEM Eng Q 23(2):225–230
Doan TTL, Gao SL, Mader E (2006) Jute/polypropylene composites I. Effect of matrix modification. Compos Sci Technol 66:952–963
Facca AG, Kortscht MT, Yan N (2006) Predicting the elastic modulus of natural fiber reinforced thermoplastics. Compos A 37(10):1660–1671
Felix JM, Gatenholm P (1991) The nature of adhesion in composites of modified cellulose fibers and polypropylene. J Appl Polym Sci 42:609–620
Garcia GE, Delgado SR, Vazquez RNA, Hernandez GE, Rosa RZE, Rodriguez SR (2012) Modification of rice husk to improve the interface in isotactic polypropylene composites. Lat Am Appl Res 42:83–87
Grozdanove A, Buzarovska A, Bogorea GG, Avella M, Errico ME, Gentille G (2006) Rice straw as an alternative reinforcement in polypropylene composites. Agron Sustain Dev 26:251–255
Guo C, Lipping L, Wang Q (2012) Investigation on the compatibilizing effect of m-isopropenyl- α–α-dimethylbenzyl isocyanate grafted polypropylene on polypropylene and wood flour composites. Wood Sci Technol 46:257–270
Hwang C, Hse C, Shupe TF (2008) Effects of raw materials on the properties of wood fiber-polyethylene composites part 3: effect of a compatibilizer and wood adhesive on the interfacial adhesion of wood/plastic composites. For Prod J 58:66–72
Iyer KA, Novel John MT (2013) Synergistic composites of polypropylene and rice husk ash: sustainable resource hybrids prepared by solid-state shear pulverization. Polym Compos 34:1211–1221
Jang J, Lee E (2001) Improvement of the flame retardancy of paper sludge/polypropylene composite. Polym Test 20:7–13
Karmakar AC, Youngquist JA (1996) Injection molding of polypropylene reinforced with short jute fibers. J Appl Polym Sci 62:1147–1151
Karmarkar A (2007) Wood fiber filled Polyofin. In: Ph.D. Thesis. IISc, Bangalore
Karmarkar A, Aggarwal P, Modak J, Chanda M (2003) Grafting of m-isopropenyl, α–α-dimethylbenzylisocyanate (m-TMI) onto isotactic polypropylene: synthesis and characterization. J Polym Mater 20:101–107
Karmarkar A, Chauhan SS, Modak JM, Chanda M (2007) Mechanical properties of wood-fiber reinforced polypropylene composites: effect of a novel compatibilizer with isocyanate functional group. Compos A 38:227–233
Keener TJ, Stuart RK, Brown TK (2004) Maleated coupling agent for natural fiber composites. Compos A 35:357–362
Kim HS, Yang HS, Kim HJ, Park HJ (2004) Thermogravimetric analysis of rice husk flour filled thermoplastic polymer composites. J Therm Anal Calorim 76:395–404
Kim HS, Kim S, Kim HJ, Yang HS (2006) Thermal properties of bio-flour filled polyolefin composites with different compatibilizing agents, type and content. Thermochim Acta 451:181–188
Kuo PY, Wang SY, Chen JH, Hsueh HC, Tsai MJ (2009) Effects of material compositions on the mechanical properties of wood–plastic composites manufactured by injection molding. Mater Des 30(9):3489–3496
Mukhopadhyay S, Deopura BL, Alagiruswamy RJ (2003) Interface behavior in polypropylene composites. Thermoplast Compos Mater 16:479–495
Oksman K, Clemons G (1988) Mechanical properties and morphology of impact modified polypropylene –wood flour composites. J Appl Polym Sci 67:1503–1513
Prachayawarakon J, Yaemboonying P (2004) Mechanical and morphological properties of rice husk-filled polypropylene. Chiang Mai J of Sci 31(1):35–44
Rahman R, Hasan M, Hoque MM, Islam MN (2010) Physico-mechanical properties of jute fiber reinforced polypropylene composites. J Reinf Plast Compos 29(3):445–455
Rana AK, Mandal A, Mitra BC, Jacobson R, Rowell R, Banerjee AN (1998) Short jute fiber-reinforced polypropylene composites: effect of compatibilizer. J Appl Polym Sci 6:329–338
Rosa SML, Santos EF, Ferriera CA, Neehtigall SMB (2009a) Studies on the properties of rice husk-filled composites-effect of maleated PP. Mater Res. ISSN 1980-5373
Rosa SML, Nachtigall SMB, Ferreira CA (2009b) b) Thermal and dynamic-mechanical characterization of rice-husk filled polypropylene composites. Macromol Res 17(1):8–13
Sain M, Panthapulakki S (2006) Bioprocess preparation of wheat straw fibers and their characterization. Ind Crops Prod 23(1):1–8
Sanadi, AR, Caulfield DF, Jacobson RE (1997) Paper and composites from agro-based resources. In: Agro-fiber thermoplastic composites. Lewis Publishers, CRC Press, Boca Raton, pp 139–146
Toro P, Quijada R, Murillo O, Yazadani PM (2005) Study of the morphology and mechanical properties of PP composites with silica or rice husk. Polym Int 54:730–734
Yang HS, Kim HJ, Park H-J, Lee BJ, Twang TS (2004) Rice husk flour filled polypropylene composites: mechanical and morphological study. Compos Struct 63:305–312
Yang HS, Kim HJ, Park H-J, Lee BJ, Twang TS (2007) Effect of compatibilizing agents on rice-husk flour reinforced polypropylene composites. Compos Struct 77(1):45–55
Acknowledgements
Authors are thankful to the Director and Group Coordinator (Research), Institute of Wood Science and Technology, Bengaluru for supporting the study. Thanks are also due to Mr. V. Krishna Technical Office and Mr. Anand Raj, Junior Research Fellow for their help. Financial support from Indian Council of Forestry Research and Education is highly acknowledged.
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Raghu, N., Kale, A., Chauhan, S. et al. Rice husk reinforced polypropylene composites: mechanical, morphological and thermal properties. J Indian Acad Wood Sci 15, 96–104 (2018). https://doi.org/10.1007/s13196-018-0212-7
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DOI: https://doi.org/10.1007/s13196-018-0212-7