A study of chemical structure of soft and hardwood and wood polymers by FTIR spectroscopy

Pandey, Krishna K.

doi:10.1002/(sici)1097-4628(19990321)71:12<1969::aid-app6>3.0.co;2-d

Cited by 1,024 publications

(585 citation statements)

References 10 publications

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“…The increase in the intensity of the 1600 cm -1 band may indicate quinine formation by irradiation during accelerated ageing which was found at around 1650 cm -1 region by other researchers [30]. The bands at 1734 and 1600 cm -1 are characteristic absorptions of carbonyl stretching vibrations of non-conjugated (in xylan) and conjugated (in lignin) esters and carboxylic acids, and their concentration increases as carbonyl groups are liberated from lignin and/or carbohydrates due to chemical degradation [30][31][32]. Pure PLA has a C-H deformation band at 1350 to 1460 cm -1 , which was found to be at 1400 cm -1 for both control and accelerated aged samples [17].…”

Section: Fourier Transform Infrared (Ftir) Spectra Analysismentioning

confidence: 96%

Influence of accelerated ageing on the physico-mechanical properties of alkali-treated industrial hemp fibre reinforced poly(lactic acid) (PLA) composites

Islam

Pickering

Foreman³

2010

Polymer Degradation and Stability

138

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Abstract. In this study, 30 wt% aligned untreated long hemp fibre/PLA (AUL) and aligned alkali treated long hemp fibre/PLA (AAL) composites were produced by film stacking and subjected to accelerated ageing environment. Accelerated ageing was carried out with an accelerated ageing chamber using UV-irradiation and water spray at 50 °C for four different time intervals (250, 500, 750 and 1000 hrs). After accelerated ageing, tensile strength (TS), flexural strength, Young's modulus (YM), flexural modulus and mode I fracture toughness (K Ic ) were found to decrease and impact strength (IS) was found to increase for both AUL and AAL composites. AUL composites had greatest overall reduction in mechanical properties than that for AAL composites upon exposure to accelerated ageing environment. FTIR analysis and crystallinity contents of the accelerated aged composites support the results of the deterioration of mechanical properties upon exposure to accelerated ageing environment.

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Section: Fourier Transform Infrared (Ftir) Spectra Analysismentioning

confidence: 96%

Influence of accelerated ageing on the physico-mechanical properties of alkali-treated industrial hemp fibre reinforced poly(lactic acid) (PLA) composites

Islam

Pickering

Foreman³

2010

Polymer Degradation and Stability

138

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“…The development of fourier transform infrared (FTIR) microscopy, with its non-destructive and rapid technique that surpasses conventional techniques, enabled studies on wood and other lignocellulosics' surface characterisation, as well as lignin and carbohydrate content evaluation. The conventional method is laborious and destructive to natural polymer (Pandey 1999).…”

Section: Neighbourhood Of Vessels: Chemical Composition and Microfibrmentioning

confidence: 99%

Neighborhood of Vessels: Chemical Composition

Yahya¹,

Yansen²,

Sundaryono³

et al. 2017

JTFS

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“…19 -24 In addition, FTIR was employed to study functional groups in wood. [25][26][27] The results of the study reported here will aid in the development of an understanding of how processing methods affect color fade and mechanical properties of wood-flour/HDPE composites after weathering.…”

Section: Introductionmentioning

confidence: 99%

Effect of processing method on surface and weathering characteristics of wood–flour/HDPE composites

Stark

Matuana

Clemons

2004

J of Applied Polymer Sci

176

119

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Wood-plastic lumber is promoted as a lowmaintenance high-durability product. When exposed to accelerated weathering, however, wood-plastic composites may experience a color change and/or loss in mechanical properties. Different methods of manufacturing wood-plastic composites lead to different surface characteristics, which can influence weathering. In this study, 50% wood-flourfilled high-density polyethylene (HDPE) composite samples were injection molded, extruded, or extruded and then planed, to remove the manufacturing surface characteristics. Fourier transform infrared spectroscopy was used to chemically show the difference in surface components. The samples were weathered in a xenon-arc weathering apparatus for 1000, 2000, and 3000 h and analyzed for color fade and loss of flexural modulus of elasticity and strength. Final color (lightness) after weathering was not dependent on the manufacturing method. However, the manufacturing method was related to mechanical property loss caused by weathering. Composites with more wood component at the surface (i.e., planed samples) experienced a larger percentage of total loss in flexural modulus of elasticity and strength after weathering.

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A study of chemical structure of soft and hardwood and wood polymers by FTIR spectroscopy

Cited by 1,024 publications

References 10 publications

Influence of accelerated ageing on the physico-mechanical properties of alkali-treated industrial hemp fibre reinforced poly(lactic acid) (PLA) composites

Influence of accelerated ageing on the physico-mechanical properties of alkali-treated industrial hemp fibre reinforced poly(lactic acid) (PLA) composites

Neighborhood of Vessels: Chemical Composition

Effect of processing method on surface and weathering characteristics of wood–flour/HDPE composites

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