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Abstract  

In this study, the thermal stability of sisal in cycle process was investigated between room temperatures and 600°C in various conditions (in air, in composites, in argon) by thermogravimetry and mechanical testing measurement. The results indicated that the thermal stability of sisal was worse in air before five times of thermal cycles, but after the five times thermal stability of sisal in composites was better. In different conditions of same cycles process, the thermal stability of sisal was different. With increasing of thermal cycles times, the max. load (is the maximum strength in stress-strain curve) of sisal fiber showed downtendency in different conditions and decreased most obviously in composites.

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Abstract  

Pyrolytic process has a promising potential for the environmentally friendly upgrading of lignocellulosic and plastic waste. Thermogravimetry and pyrolysis-gas chromatography-mass spectrometry (Py-GC/MS) were used to get information about the reactive decomposition of PCL in binary mixtures with microcrystalline cellulose (MC) or sisal fibres (SF). Preliminary thermogravimetric investigation showed that biomass is thermally degraded at lower temperatures than PCL and this process has a predominant influence on the thermal behaviour of the mixtures. Discrepancies between the experimental and predicted TG/DTG profiles were considered as a measurement of the extent of interactions occurring on co-pyrolysis. It was found that reactivity of PCL was slightly increased in PCL-SF binary mixtures. Evolution of acidic products from cellulose and hemicelluloses decomposition may promote PCL degradation in binary mixtures with SF. It seems that the co-pyrolysis process could have potential for the environmentally friendly transformation of biocomposites.

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-3538(03)00100-3 . 3. Fung , KL , Xing , XS , Li , RKY , Tjong , SC , Mai , YW 2003 An investigation on the processing of sisal fibre reinforced polypropylene composites . Compos Sci Technol 63 9 1255 – 1258 10.1016/S0266

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. 6. Joseph , PV , Joseph , K , Thomas , S , Pillai , CKS , Prasad , VS , Groeninckx , G , Sarkissova , M . The thermal and crystallization studies of short sisal fibre reinforced polypropylene composites

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] Idicula et al. [ 23 ] reported that user-friendly and cost-effective composite materials possessing appropriate stiffness and damping behavior can be obtained by hybridising banana and sisal fibers. The role of fiber/matrix interactions of chemically

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mechanical analysis of polystyrene composites reinforced with short sisal fibres . Comp Sci Technol 2001 61 16 2519 – 2529 10.1016/S0266-3538(01)00170-1 . 12. Ray , D , Sarkar , BK , Bose

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. Joseph , PV , Joseph , K , Thomas , S , Pillai , CKS , Prasad , VS , Groeninckx , G , Sarkissova , M 2003 The thermal and crystallization studies of short sisal fibre reinforced polypropylene composites . Compos Part A 34 : 253 – 266 10

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be used in these experiments. Other studies discuss nucleation influence of other lignocellulosic materials, primarily, natural fibres. For example, by using short sisal fibres, an increase in the crystallisation temperature and crystallinity

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