Composites made of polypropylene, a mixture of polypropylene and poly(lactic acid) and spruce wood fibres both non-modified and modified with toluene 2,4-diisocyanate – were prepared by melt blending. The chemical modifications of wood fibres with toluene 2,4-diisocyanate were evidenced by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. Wood fibre reinforced polypropylene/poly(lactic acid) composites prepared with addition of maleic anhydride polypropylene as coupling agent were further investigated for structural and morphology properties before and under controlled accelerated weathering conditions by attenuated total reflectance Fourier transform infrared spectroscopy, mechanical testing and scanning electron microscopy analysis. Some specific indexes (carbonyl and vinyl) were also calculated.
YuLDeanKLiL. Polymer blends and composites from renewable resources. Prog Polym Sci2006; 31: 576–602.
2.
LuJZWuQMcNabbHSJr. Chemical coupling in wood fiber and polymer composites: a review of coupling agents and treatments. Wood Fiber Sci2000; 32(1): 88–104.
3.
OksmanKLindbergH. Influence of thermoplastics elastomers on adhesion in polyethylene-wood flour composites. J Appl Polym Sci1998; 68: 1845–1855.
QuinneyRFBanksWB. The activation of wood fibre for thermoplastic coupling, the reaction of wood with a potential coupling agent. J Wood Chem Technol1995; 15(4): 529–544.
6.
GauthierRJolyCCoupasAC. Interfaces in polyolefin/cellulosic fiber composites: chemical coupling, morphology, correlation with adhesion and aging in moisture. Polym Compos1998; 19(3): 287–300.
7.
MaldasDKoktaBV. Surface modification of wood fibers using maleic anhydride and isocyanate as coating components and their performance in polystyrene composites. J Adhes Sci Technol1991; 5(9): 727–774.
8.
PapadopoulosANHillCASTraboulayE. Isocyanate resins for particleboard: PMDI vs EMDI. Holz Roh Werkst2002; 60: 81–83.
9.
FrihartCRWood adhesion and adhesive. In: RowellRM (eds). Handbook of wood chemistry and wood composites, Boca Raton, FL: CRC Press, 2005, pp. 257–260.
10.
FornasieriMWeiller AlvesJMunizEC. Synthesis and characterization of polyurethane composites of wood waste and polyols from chemically recycled PET. Composites Part A2011; 42(2): 189–195.
11.
KarianHG. Handbook of polypropylene and polypropylene composites, 2nd ed. Whitmore Lake, MI: Marcel Dekker Inc, 2003, pp. 741–741.
12.
WoodhamsRTThomasGRogersDK. Wood fibers as reinforcing fillers for polyolefins. Polym Eng Sci1984; 24: 1166–1171.
13.
SainMMKoktaBV. Effect of reactive additives on the performance of cellulose fiber-filled polypropylene composites. J Adhes Sci Technol1993; 7(1): 49–61.
ZhangFEndoTQiuW. Preparation and mechanical properties of composite of fibrous cellulose and maleated polyethylene. J Appl Polym Sci2002; 84: 1971–1980.
16.
KimT-WLeeS-YChunS-J. Effect of silane coupling on the fundamental properties of wood flour reinforced polypropylene composites. J Compos Mater2011; 45(15): 1595–1605.
17.
RanaAKMandalAMitraBC. Short jute fiber-reinforced polypropylene composites: effect of compatibilizer. J Appl Polym Sci1998; 69: 329–338.
18.
KazayawokoMBalatineczJJMatuanaLM. Surface modification and adhesion mechanisms in wood fiber-polypropylene composites. J Mater Sci1999; 34: 6189–6199.
19.
BogaertJCCoszachP. Poly(lactic acids): a potential solution to plastic waste dilemma. Macromol Symp2000; 153: 287–303.
20.
GarlottaD. A literature review of poly(lactic acid). J Polym Environ2001; 9: 63–84.
BenjaminBSsigJM. Impact and tensile properties of PLA/cordenka and PLA/flax composites. Compos Sci Technol2008; 68: 1601–1607.
25.
StarkNMMatuanaLMClemonsCM. Effect of processing method on the surface and weathering characteristics of wood-flour/HDPE composites. J Appl Polym Sci2004; 93: 1021–1030.
26.
StarkNMMatuanaLM. Influence of photostabilizers on wood flour–HDPE composites exposed to xenon-arc radiation with and without water spray. Polym Degrad Stab2006; 91: 3048–3056.
27.
ColomXCarrilloFNoguesF. Structural analysis of photodegraded wood by means of FTIR spectroscopy. Polym Degrad Stab2003; 80: 543–549.
28.
PandeyKK. A study of chemical structure of soft and hardwood and wood polymers by FTIR spectroscopy. J Appl Polym Sci1999; 71: 1969–1975.
29.
ColomXCanavateJPagesP. Changes in crystallinity of the HDPE matrix in composites with cellulosic fiber using DSC and FTIR. J Reinf Plast Compos2000; 19: 818–830.
30.
NzokouPKamdemDP. X-ray photoelectron spectroscopy study of red oak (Quercus rubra), black cherry (Prunus serotina) and red pine (Pinus resinosa) extracted wood surfaces. Surf Interface Anal2005; 37: 689–694.
31.
MatuanaLMKamdemDP. Accelerated ultraviolet weathering of PVC/wood-flour composites. Polym Eng Sci2002; 42: 1657–1666.
32.
DorrisGMGrayDG. The surface analysis of paper and wood fibres by ESCA (electron spectroscopy for chemical analysis). I: application to cellulose and lignin. Cellul Chem Technol1978; 12: 721–734.
33.
GrigsbyWMcDonaldAGThummA. X-ray photoelectron spectroscopy determination of urea formaldehyde resin coverage on MDF fibre. Holz Roh Werkst2004; 62: 358–364.
34.
GeorgeJSreekalaMSThomasS. A review on interface modification and characterization of natural fiber reinforced plastic composites. Polym Eng Sci2001; 41: 1471–1485.
35.
JosephKThomasSPavithranC. Effect of chemical treatment on the tensile properties of short sisal fibre-reinforced polyethylene composites. Polymer1996; 37: 5139–5149.
36.
NygårdPTanemBSKarlsenT. Extrusion-based wood fibre–PP composites: wood powder and pelletized wood fibres – a comparative study. Compos Sci Technol2008; 68: 3418–3424.
37.
SombatsompopNYotinwattanakumtornCThongpinC. Influence of type and concentration of maleic anhydride grafted polypropylene and impact modifiers on mechanical properties of PP/wood sawdust composites. J Appl Polym Sci2005; 97: 475–484.
38.
DavisASimsD. Weathering of plastics, Essex: Applied Science Publishers, 1983, pp. 294–294.
