publication . Article . 2002

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

TAPIA,C.; SAPAG-HAGAR,J.; ANDRADE,C.T.; HASSÓN,J.; VALENZUELA,F.; BASUALTO,C.;
Open Access
  • Published: 01 Sep 2002 Journal: Boletín de la Sociedad Chilena de Química, volume 47 (eissn: 0366-1644, Copyright policy)
  • Publisher: SciELO Comision Nacional de Investigacion Cientifica Y Tecnologica (CONICYT)
Abstract
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 ...
Subjects
free text keywords: Reacciones de Celulosa, Propiedades de Solución, Termogravimetría, Morfología, Methycellulose, Cellulose reactions, Solution properties, Thermogravimetry, Morphology, General Chemistry, Metilcelulosa, Kraft paper, Reaction conditions, Nuclear chemistry, Pinus radiata, biology.organism_classification, biology, Chemistry, Organic chemistry, Cellulose, chemistry.chemical_compound
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publication . Article . 2002

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

TAPIA,C.; SAPAG-HAGAR,J.; ANDRADE,C.T.; HASSÓN,J.; VALENZUELA,F.; BASUALTO,C.;