Impact behavior of short and continuous fiber-reinforced polyester composites

Abstract

In this study, the impact strengths of E-glass, coir, oil palm as well as E-glass/coir and E-glass/oil palm hybrid polyester composites were studied. All types of composites were reinforced with fiber volume fractions of 30%, 40%, and 50% and fiber lengths 3, 7, and 10 mm. Composite laminates reinforced with longitudinal and transverse coir fiber mats were also studied. The number of fiber mats varied from 1, 2, 3, and 4 layers for non-spaced fiber mats and 2, 3, and 4 layers for 1.5 mm spaced fiber mats. Besides, coir—polyester composite with addition of sand filler was studied as well, with 40%, 50%, and 60% of volume fractions and fiber lengths of 3, 7, and 10 mm. Results show that impact strength improves with fiber content and fiber length. In addition, longitudinal fiber mats always exhibit better impact toughness compared to transverse fiber mats. Impact strength is improved with the number of fiber layers but worsened by the fiber spacing. As for coir/polyester concrete, low fiber content and fiber length improve the impact strength. The fractured surfaces were inspected under scanning electron microscope to investigate the fracture mechanisms in each type of composites.

Keywords

Coir fiber composites E-glass fiber impact strength oil palm fiber polyester

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References

Kaufmann M. Giant molecules. London: Aldus Books , 1967.

Phillips LN Design with advanced composites materials. New York: Springer-Verlag, 1989.

Hull D. , Clyne TW An introduction to composite materials, 2nd ed. New York : Cambridge University Press, 1996.

Ochi S. Mechanical properties of kenaf fibres and kenaf/ PLA composites. Mech Mater 2008; 40: 446-452.

Corbiere-Nicollier T , Gfeller laban B. , Lundquist L. , Leterrier Y. , Manson JAE and Jolliet O. Life cycle assesment of biofibers replacing glass fibers as reinforcement in plastics. Resour Conserv Recycl 2001; 33: 267-287.

Wambua P. , Ivens J. and Verpoest I.

Natural fibers: can they replace glass in fiber reinforced plastics?

Compos Sci Technol 2003; 63: 1259-1264.

Joshi SV , Drzal LT , Mohanty AK and Arora S.

Are natural fiber composites environmentally superior to glass fibre reinforced composites?

Composites Part A 2004 ; 35: 371-376.

Nishino T. , Hirao K. , Kotera M. , Nakamae K. and Inagaki H. Kenaf reinforced biodegradable composite. Compos Sci Technol 2003; 63: 1281-1286.

Lai WL and Mariatti M. The properties of woven betel palm (Areca catechu) reinforced polyester composites . J Reinf Plast Compos 2008; 27: 925-935.

10.

Baiardo M. , Elisa Z. and Mariastella S. Flax fibre- polyester composites. Composites Part A 2004; 35: 703-710.

11.

Gowda TM , Naidu ACB and Rajput C. Some mechanical properties of untreated jute fabric-reinforced polyester composite . Compos Part A: Appl Sci Manuf 1999; 30: 277-284.

12.

Saleem Z. , Rennebaum H. , Pudel F. and Grimm E. Treating bast fibres with pectinase improves mechanical characteristic of reinforced thermoplastic composites. Compos Sci Technol 2008; 68: 471-476.

13.

Mohanty AK , Misra M. and Hinrichsen G. Biofibers, biodegradable polymers and biocomposites: an overview. Macromol Mater Eng 2000; 276/277: 1-24.

14.

Mohanty AK , Misra M. and Drzal LT Sustainable bio-composites from renewable resources: opportunities and challenges in the green materials world. J Polym Environ 2002; 10: 19-26.

15.

Doan TTL , Gao SL and Mäder E. Jute/polypropylene composites I. Effect of matrix modification. Compos Sci Technol 2006; 66: 952-963.

16.

Huda MS , Drzal LT , Mohanty AK and Misra M. Chopped glass and recycled newspaper as reinforcement fibers in injection molded poly (lactic acid) (PLA) composites: a comparative study. Compos Sci Technol 2006; 66: 1813-1824.

17.

Fu SY , Lauke B. , Mäder E. , Hu X. and Yue CY Fracture resistance of short-glass-fiber-reinforced and short-carbon-fiber-reinforced polypropylene under Charpy impact load and its dependence on processing. J Mater Process Technol 1999; 89-90: 501-507.

18.

Mohanty S. , Nayak SK , Verma SK and Tripathy SS Effect of MAPP as coupling agent on the performance of sisal-PP composites . J Reinf Plast Compos 2004; 23: 2047-2063.

19.

Sanadi AR , Prasad SV and Rohatgi PK Sunhemp fibre-reinforced polyester, Part 1: analysis of tensile and impact properties. J Mater Sci 1986; 21: 4299-4304.

20.

Öztürk S. The effect of fibre content on the mechanical properties of hemp and basalt fibre reinforced phenol formaldehyde composites . J Mater Sci 2005; 40: 4585-4592.

21.

Nayak SK and Mohanty S. Sisal glass fiber reinforced PP hybrid composites: evaluation of dynamic mechanical and thermal properties. J Reinf Plast Compos 2009.

22.

Razi PS and Raman A. Studies on impact fracture properties of wood-polymer composites. J Compos Mater 2000; 34: 980-997.

23.

Rajalu AV , Rao GB , Devi LG , Ramaiah S. , Prada DS , Bhat KS , et al. Mechanical properties of short, natural fiber Hildegardia populifolia-reinforced styrenated polyester composites. J Reinf Plast Compos 2005; 24: 423-428.

24.

Cui YH , Tao J. , Noruziaan B. , Cheung M. and Lee S. DSC analysis and mechanical properties of wood-plastic composites . J Reinf Plast Compos 2008.

25.

Kim JK and Mai YW High strength, high fracture toughness fiber composites with interface control-a review. Compos Sci Technol 1991; 41: 333-378.

26.

Reis JML. Fracture and flexural characterization of natural fiber-reinforced polymer concrete. Constr Build Mater 2006; 20: 673-678.

27.

Mishra S. , Mohanty AK , Drzal LT , Misra M. , Parija S. , Nayak SK , et al. Studies on mechanical performance of biofibre/glass reinforced polyester hybrid composites. Compos Sci Technol 2003; 63: 1377-1385.

28.

Reddy GV , Naidu SV and Rani TS Impact properties of kapok based unsaturated polyester hybrid composites . J Reinf Plast Compos 2008; 27: 1789-1804.

29.

ASTM-D256. Standard test methods for determining the Izod pendulum impact resistance of plastics . West Conshohocken, Pennsylvania: ASTM International , 1997.

30.

Agarwal BD , Broutman LJ and Chandrashekhara K. Analysis and performance of fiber composites, 3rd edn. New York: Wiley Interscience Publications, 2006.

31.

Brahmakumar M. , Pavithran C. and Pillai RM Coconut fibre reinforced polyethylene composites: effect of natural waxy surface layer of the fibre on fibre/matrix interfacial bonding and strength of composites. Compos Sci Technol 2005; 65: 563-569.

32.

Abdul Khalil HPS , Hanida S. , Kang CW and Nikfuaad NA Agro-hybrid composite: the effects on mechanical and physical properties of oil palm fiber (EFB)/glass hybrid reinforced polyester composites. J Reinf Plast Compos 2007; 26: 203-218.

33.

Hariharan ABA and Abdul Khalil HPS. Lignocellulose-based hybrid bilayer laminate composite: Part I - studies on tensile and impact behavior of oil palm fiber-glass fiber-reinforced epoxy resin. J Compos Mater 2005; 39: 663-684.

34.

Sreekala MS , George J. , Kumaran MG and Thomas S. The mechanical performance of hybrid phenol-formaldehyde based composites reinforced with glass and oil palm fibres. Compos Sci Technol 2002; 62: 339-353.

35.

Kelly A. and Tyson W. Tensile properties of fibre-reinforced metals: copper/tungsten and copper molybdenum. J Mech Phys Solids 1965 ; 13: 329-350.

36.

Prasad SV , Pavithran C. and Rohatgi PK Alkali treatment of coir fibres for coir-polyester composites. J Mater Sci 1983; 18: 1443-1454.

37.

Chand N. , Rohatgi PK and Satyanarayana KG In: Lac Stuard M (ed.), International encylopedia of composites. Vol. 4, Germany: VCH Publishers, 1991, p.9.

38.

Ahmed KS , Vijayarangan S. and Rajput C. Mechanical behavior of isothalic polyester-based untreated woven jute and glass fabric hybrid composites. J Reinf Plast Compos 2006; 25: 1549-1569.

39.

Fu SY and Lauke B. The fibre pull-out energy of misaligned short fibre composites. J Mater Sci 1997; 32(8): 1985-1993.

40.

Aziz SH and Ansell MP The effect of alkalization and fibre alignment on the mechanical and thermal properties of kenaf and hemp bast fibre composites: Part 2 - cashew nut shell liquid matrix. Compos Sci Technol 2004; 64: 1231-1238.

41.

Liang JZ Impact fracture toughness of hollow glass bead-filled polypropylene composites . J Mater Sci 2007; 42(3): 841-846.

42.

Oksman K. Mechanical properties of natural fibre mat reinforced thermoplastic . Appl Compos Mater 2000; 7(5-6): 403-414.

43.

Pothan LA , Potschke P. , Habler R. and Thomas S. The static and dynamic mechanical properties of banana and glass fiber woven fabric-reinforced polyester composite. J Compos Mater 2005; 39: 1007-1025.

44.

Moloney AC , Kausch HH , Kaiser T. and Beer HR Review - parameters determining the strength and toughness of particulate filled epoxide resins. J Mater Sci 1987; 22: 381-393.

45.

Mallick PK Fibre-reinforced composites: materials, manufacturing and design. New York: Marcel Dekker, 1993.

46.

Khaund AK , Krstic VD and Nicholson PS Influence of elastic and thermal mismatch on the local crack-driving force in brittle composites. J Mater Sci 1977 ; 12: 2269-2273.

47.

Goodier JN Concentration of stress around spherical and cylindrical inclusions and flaws . J Appl Mech 1933; 1: 39-44.

48.

Wong KJ , Yousif BF , Low KO , Ng Y. and Tan SL Effects of fillers on fracture behaviour of particulate polyester composites . J Strain Anal Eng Des 2010; 45: 67-78.

49.

Pavithran C. , Gopakumar K. , Prasad SV and Rohatgi PK Copper coating on coir fibres. J Mater Sci 1981; 16: 1548-1556.

50.

Sınmazçelik T. , Arıcı AA and Günay V. Impact-fatigue behaviour of unidirectional carbon fibre reinforced polyetherimide (PEI) composites . J Mater Sci 2006; 41: 6237-6244.

51.

Sreekala JS , Oommen MS , Koshy ZP and Thomas S. A comparison of the mechanical properties of phenol formaldehyde composites reinforced with banana fibers and glass fibers. Compos Sci Technol 2002; 62: 1857-1868.

52.

Oksman K. , Wallstrom L. , Berglund LA and Filho RDT. Morphology and mechanical properties of unidirectional sisal-epoxy composites . J Appl Polym Sci 2002; 84: 2358-2365.

53.

Chawla KK Composite materials (Materials research and engineering). New York: Springer-Verlag, 1942.

54.

Rout J. , Misra M. , Mohanty AK , Nayak SK and Tripathy SS SEM observations of the fractured surfaces of coir composites. J Reinf Plast Compos 2003; 22: 1083-1100.

55.

John K. and Naidu SV Sisal fiber/glass fiber hybrid composites: the impact and compressive properties . J Reinf Plast Compos 2004; 23: 1253-1258.

56.

Abdul Khalil HPS , Kang CW , Khairul A. , Ridzuan R. and Adawi TO The effect of different laminations on mechanical and physical properties of hybrid composites . J Reinf Plast Compos 2009; 28: 1123-1137.

57.

Arumugam N. , Tamareselvy K. and Venkata Rao K. Coconut fiber-reinforced rubber composites. J Appl Polym Sci 1989 ; 37: 2645-2659.

58.

Yamini S. and Young RJ The mechanical properties of epoxy resins. Part 2 Effect of plastic deformation upon crack propagation. J Mater Sci 1980; 15: 1823-1831.

59.

Kinloch AJ and Williams JG Crack blunting mechanisms in polymers. J Mater Sci 1980; 15: 987-996.

60.

Kitey R. and Tippur HV Role of particle size and filler- matrix adhesion on dynamic fracture of glass-filled epoxy. I. Macromeasurements. Acta Mater 2005 ; 53: 1153-1165.

61.

Kitey R. and Tippur HV Role of particle size and filler-matrix adhesion on dynamic fracture of glass-filled epoxy. II. Linkage between macro- andmicro-measurements. Acta Mater 2005; 53: 1167-1178.