000			02660nam a2200241Ia 4500
003			MX-MdCICY
005			20250625122510.0
040			_cCICY
090			_aB-6066
245	1	0	_aEcofriendly behavior of host matrix in composites prepared from agro-waste and polypropylene
490	0		_vJournal of Applied Polymer Science, 90(4), p.1009-1017, 2003
520	3		_aComposites were prepared by two methods: (1)graft copolymerization (GFC)of isotactic polypropylene (PP)with coupling agent maleic anhydride (MAH), followed by esterification with coir fiber; (2)by direct reactive mixing (DFC)of PP, MAH, and peroxide with coir fiber in a minimax molder. These composites, after molding in films (5 × 5 cm, 100 m thickness)were examined for susceptibility to biological attack by measuring the percentage weight loss in compost up to 6 months, periodically, and fungal colonization on surface of the samples, when kept as sole carbon source for the growth of Aspergillus niger in culture medium up to 40 days. Photodegradation was evaluated by monitoring the variations in a Fourier transform infrared spectrum and crack formation after successive treatment with ultraviolet (UV)light (290 nm)for 0, 20, 50, and 100 h at 60°C in the presence of air. Specimens of virgin PP were taken as a reference during all periods of photo- and biodegradations. Significant consequences of the manner of composite preparation on photo/biodegradation were observed during the whole study. DFC samples degraded faster than GFC during the composting whereas, in culture, GFC was covered by fungi in a highly well-uniform way. It is shown that photo-oxidative aging directly enhanced the biodegradability of composites, as an increase in fungal growth rate and decrease in weight during composting was found. It was concluded that extent of compatibilization has a profound effect on photo/biodegradation of composite material; consequently, ester bonds were the main units during fungal consumption. Surface erosion was maximum in the case of 100 h UV-treated GFC and minimum for unirradiated PP after culture exposure, as shown by scanning electron microscopy, which is due to the use of composite films as energy source by microbes.
650	1	4	_aCOMPATIBILIZATION
650	1	4	_aCOMPOSITES
650	1	4	_aBIODEGRADATION
650	1	4	_aPHOTODEGRADATION
700	1	2	_aPandey, J.K.
700	1	2	_aAhmad, A.
700	1	2	_aSingh, R.P.
856	4	0	_uhttps://drive.google.com/file/d/1udQN7SdwOOEI1_qP1JedFlvNuo0jQYEL/view?usp=drivesdk _zPara ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx
942			_2Loc _cREF1
008			250602s9999 xx |||||s2 |||| ||und|d
999			_c40411 _d40411