DISSOLVED STATE OF CELLULOSE DIACETATE IN TETRAHYDROFURAN

DISSOLVED STATE AND VISCOSITY PROPERTIES OF CELLULOSE IN A NaOH COMPLEX SOLVENT

Cellulose may be quickly dissolved in a NaOH complex solvent (NaOH/urea/thiourea/H2O). A detailed investigation on the effects of solvent composition and temperature on cellulose solubility has been presented. Optical microscopy and wide-angle X-ray diffraction (WAXD) were used to study the process of dissolution. The highest solubility of cellulose was recorded in NaOH/urea/thiourea/H2O with a...

Blends of dissolved cellulose with acrylic acid copolymers or microfibrillated cellulose

Aalto University, P.O. Box 11000, FI-00076 Aalto www.aalto.fi Author Eve Saarikoski Name of the doctoral dissertation Blends of dissolved cellulose with acrylic acid copolymers or microfibrillated cellulose Publisher School of Chemical Technology Unit Department of Biotechnology and Chemical Technology Series Aalto University publication series DOCTORAL DISSERTATIONS 10/2015 Field of research P...

critical period effects in foreign language learning:the influence of maturational state on the acquisition of reading,writing, and grammar in english as a foreign language

since the 1960s the age effects on learning both first and second language have been explored by many linguists and applied linguists (e.g lennerberg, 1967; schachter, 1996; long, 1990) and the existence of critical period for language acquisition was found to be a common ground of all these studies. in spite of some common findings, some issues about the impacts of age on acquiring a second or...

Nanoindentation of Biodegradable Cellulose Diacetate-graft-Poly(L-lactide) Copolymers: Effect of Molecular Composition and Thermal Aging on Mechanical Properties

Nanoindentation of cellulose diacetate-graft-poly(lactide)s (CDA-g-PLLAs) synthesized by ring opening graft copolymerization of L-lactide in bulk onto the residual hydroxyl positions on CDA were conducted to investigate the effect of the molecular composition and thermal aging on mechanical properties and creep behavior. Continuous stiffness measurement (CSM) technique was used to obtained hard...

Biosynthesis of tetrahydrofuran lignans in Virola surinamensis