INFLUENCE OF RESIDUAL LIGNIN CONTENT ON THE THERMAL AND MORPHOLOGICAL BEHAVIOR OF POLYPROPYLENE-KRAFT PULP COMPOSITES

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KIAEI M.; KORD B.

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Journal: Journal of Wood and Forest Science and Technology Year:2016 | Volume:23 | Issue:1 Page(s): 77-90

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Title

INFLUENCE OF RESIDUAL LIGNIN CONTENT ON THE THERMAL AND MORPHOLOGICAL BEHAVIOR OF POLYPROPYLENE-KRAFT PULP COMPOSITES

Author(s)

KIAEI M. | KORD B. | Issue Writer Certificate

Keywords

COMPOSITEQ2

KRAFT PULPINGQ2

DIFFERENTIAL SCANNING CALORIMETRYQ1

THERMOGRAVIMETRIC ANALYSISQ2

SCANNING ELECTRON MICROSCOPEQ2

Abstract

Background and objectives: Thermal degradation is therefore, one major limitation frequently encountered when using natural fibers as reinforcement in a polymeric matrix. Natural fibers are mainly composed of cellulose, hemicelluloses, and lignin which exhibit different degradation behaviors. In this study, the effect of residual lignin content on the thermal and morphological behavior of polypropylene-kraft pulp COMPOSITEs was investigated.Materials and methods: Hornbeam wood (Carpinusbetulus) chips converted to KRAFT PULPING in different effective alkali (15, 20 and 25%) and fixed levels of cooking time (120 min), temperature 170 C and sulfidity 25%. Then residual lignin content of these pulping was determined according to the TAPPI standard. For manufacturing the COMPOSITEs, kraft puplp and polypropylene at mixing ratio of 50% with 4 phc MAPP were mixed at 180 °C, 60 rpm in a co-rotate extruder. Finally, the samples were made by injection molding. Then, the thermal properties of COMPOSITEs such as weight loss, melting temperature and degree of crystalinity was studied by THERMOGRAVIMETRIC ANALYSIS (TGA) and DIFFERENTIAL SCANNING CALORIMETRY (DSC). Also, the morphological experimental were examined by scaning electron microscopy (SEM).Results: Results indicated that with increasing of effective alkali (from 15 to 25%), the values of wight loss, melting enthalpy and degree of crystalinity were increased, however, the melting temperature were decreased. Results of SEM indicated that the interface quality decreased by increasing of effective alkali and decreasing of residual lignin.Conclusion: Based on the results, it can be said that lignin extraction improves the thermal stability of polypropylene-kraft pulp COMPOSITEs due to the crystalline formation and increasing thepolymer chains mobility.

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APA: Copy

KIAEI, M., & KORD, B.. (2016). INFLUENCE OF RESIDUAL LIGNIN CONTENT ON THE THERMAL AND MORPHOLOGICAL BEHAVIOR OF POLYPROPYLENE-KRAFT PULP COMPOSITES. JOURNAL OF WOOD AND FOREST SCIENCE AND TECHNOLOGY, 23(1), 77-90. SID. https://sid.ir/paper/156662/en

Vancouver: Copy

KIAEI M., KORD B.. INFLUENCE OF RESIDUAL LIGNIN CONTENT ON THE THERMAL AND MORPHOLOGICAL BEHAVIOR OF POLYPROPYLENE-KRAFT PULP COMPOSITES. JOURNAL OF WOOD AND FOREST SCIENCE AND TECHNOLOGY[Internet]. 2016;23(1):77-90. Available from: https://sid.ir/paper/156662/en

IEEE: Copy

M. KIAEI, and B. KORD, “INFLUENCE OF RESIDUAL LIGNIN CONTENT ON THE THERMAL AND MORPHOLOGICAL BEHAVIOR OF POLYPROPYLENE-KRAFT PULP COMPOSITES,” JOURNAL OF WOOD AND FOREST SCIENCE AND TECHNOLOGY, vol. 23, no. 1, pp. 77–90, 2016, [Online]. Available: https://sid.ir/paper/156662/en

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