EFFECT OF THE REACTION CONDITIONS OVER THE YIELD AND PROPERTIES OF METHYLCELLULOSE OBTAINED FROM PINUS RADIATA KRAFT BLEACHED CELLULOSE

Kraft bleached cellulose from Pinus radiata was submitted to methylation reactions in heterogeneous media. After activation with 29% (w/w) NaOH solution, methylation reactions were carried out both with dimethyl sulfate (DMS) and methyl iodide (MI). The effects of the pressing ratio, reaction time a...

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Autores principales:	TAPIA,C., SAPAG-HAGAR,J., ANDRADE,C.T., HASSÓN,J., VALENZUELA,F., BASUALTO,C.
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2002
Materias:	Methycellulose Cellulose reactions Solution properties Thermogravimetry Morphology
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0366-16442002000300013
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spelling	oai:scielo:S0366-164420020003000132014-08-20EFFECT OF THE REACTION CONDITIONS OVER THE YIELD AND PROPERTIES OF METHYLCELLULOSE OBTAINED FROM PINUS RADIATA KRAFT BLEACHED CELLULOSETAPIA,C.SAPAG-HAGAR,J.ANDRADE,C.T.HASSÓN,J.VALENZUELA,F.BASUALTO,C. Methycellulose Cellulose reactions Solution properties Thermogravimetry Morphology Kraft bleached cellulose from Pinus radiata was submitted to methylation reactions in heterogeneous media. After activation with 29% (w/w) NaOH solution, methylation reactions were carried out both with dimethyl sulfate (DMS) and methyl iodide (MI). The effects of the pressing ratio, reaction time and type of methylation agent were studied. The better yields were obtained with dimethylsulphate and the pressing ratio and reaction time were not signficant over the yield. Methylcellulose (MC) of high degree of substitution was extracted with water and the MC of low degree of substitution was extracted with 8%w/w NaOH. Some of the MCs obtained were characterized by viscosity average molecular weight, thermal behavior, degree of substitution, steady shear solution behavior. The MC water extracted obtained under certain reaction conditions showed similar behavior that commercial MCinfo:eu-repo/semantics/openAccessSociedad Chilena de QuímicaBoletín de la Sociedad Chilena de Química v.47 n.3 20022002-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0366-16442002000300013en10.4067/S0366-16442002000300013
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Methycellulose Cellulose reactions Solution properties Thermogravimetry Morphology
spellingShingle	Methycellulose Cellulose reactions Solution properties Thermogravimetry Morphology TAPIA,C. SAPAG-HAGAR,J. ANDRADE,C.T. HASSÓN,J. VALENZUELA,F. BASUALTO,C. EFFECT OF THE REACTION CONDITIONS OVER THE YIELD AND PROPERTIES OF METHYLCELLULOSE OBTAINED FROM PINUS RADIATA KRAFT BLEACHED CELLULOSE
description	Kraft bleached cellulose from Pinus radiata was submitted to methylation reactions in heterogeneous media. After activation with 29% (w/w) NaOH solution, methylation reactions were carried out both with dimethyl sulfate (DMS) and methyl iodide (MI). The effects of the pressing ratio, reaction time and type of methylation agent were studied. The better yields were obtained with dimethylsulphate and the pressing ratio and reaction time were not signficant over the yield. Methylcellulose (MC) of high degree of substitution was extracted with water and the MC of low degree of substitution was extracted with 8%w/w NaOH. Some of the MCs obtained were characterized by viscosity average molecular weight, thermal behavior, degree of substitution, steady shear solution behavior. The MC water extracted obtained under certain reaction conditions showed similar behavior that commercial MC
author	TAPIA,C. SAPAG-HAGAR,J. ANDRADE,C.T. HASSÓN,J. VALENZUELA,F. BASUALTO,C.
author_facet	TAPIA,C. SAPAG-HAGAR,J. ANDRADE,C.T. HASSÓN,J. VALENZUELA,F. BASUALTO,C.
author_sort	TAPIA,C.
title	EFFECT OF THE REACTION CONDITIONS OVER THE YIELD AND PROPERTIES OF METHYLCELLULOSE OBTAINED FROM PINUS RADIATA KRAFT BLEACHED CELLULOSE
title_short	EFFECT OF THE REACTION CONDITIONS OVER THE YIELD AND PROPERTIES OF METHYLCELLULOSE OBTAINED FROM PINUS RADIATA KRAFT BLEACHED CELLULOSE
title_full	EFFECT OF THE REACTION CONDITIONS OVER THE YIELD AND PROPERTIES OF METHYLCELLULOSE OBTAINED FROM PINUS RADIATA KRAFT BLEACHED CELLULOSE
title_fullStr	EFFECT OF THE REACTION CONDITIONS OVER THE YIELD AND PROPERTIES OF METHYLCELLULOSE OBTAINED FROM PINUS RADIATA KRAFT BLEACHED CELLULOSE
title_full_unstemmed	EFFECT OF THE REACTION CONDITIONS OVER THE YIELD AND PROPERTIES OF METHYLCELLULOSE OBTAINED FROM PINUS RADIATA KRAFT BLEACHED CELLULOSE
title_sort	effect of the reaction conditions over the yield and properties of methylcellulose obtained from pinus radiata kraft bleached cellulose
publisher	Sociedad Chilena de Química
publishDate	2002
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0366-16442002000300013
work_keys_str_mv	AT tapiac effectofthereactionconditionsovertheyieldandpropertiesofmethylcelluloseobtainedfrompinusradiatakraftbleachedcellulose AT sapaghagarj effectofthereactionconditionsovertheyieldandpropertiesofmethylcelluloseobtainedfrompinusradiatakraftbleachedcellulose AT andradect effectofthereactionconditionsovertheyieldandpropertiesofmethylcelluloseobtainedfrompinusradiatakraftbleachedcellulose AT hassonj effectofthereactionconditionsovertheyieldandpropertiesofmethylcelluloseobtainedfrompinusradiatakraftbleachedcellulose AT valenzuelaf effectofthereactionconditionsovertheyieldandpropertiesofmethylcelluloseobtainedfrompinusradiatakraftbleachedcellulose AT basualtoc effectofthereactionconditionsovertheyieldandpropertiesofmethylcelluloseobtainedfrompinusradiatakraftbleachedcellulose
_version_	1718438149206573056

EFFECT OF THE REACTION CONDITIONS OVER THE YIELD AND PROPERTIES OF METHYLCELLULOSE OBTAINED FROM PINUS RADIATA KRAFT BLEACHED CELLULOSE

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