VISUAL AND PHOTOGRAPHIC ON-SITE INSPECTION
Abstract
Rock I land Ar enal Lab., Ill. POL MERIZATION WITHIN CELLULOSE MATRICES. PART I: THE EXCHANGE REACTION BETWEEN CALCIUM AND CARBOXYL GROUPS IN CELLULOSE. PART II: NATURE OF THE STRENGTH REINFORCEMENT, by E. S. P UTNAM. ! Feb 62, 36p. incl. illus. tables, 82 refs. (R EPT. NO. ><-%%$) (DA Proj. no. 599-25-001) Uncla sified report DE CRIPTORS: *Cellulose, *Polymerization, 8exchange reactions *Calcium, *Ion exchange, *Cellulose acetates, *Wood pulp, C ARBOXYLIC ACIDS, Calcium compounds, Acetates, Tritiated c mpounds, Food pulp ibers, Free radicals. The exchange reaction between calcium ions and the carboxy groups n international Com ittee for Cellulose Analysis pulps, was inve tigated, using tritiated calcium acetate. Acetate ion a retaine in varying amounts by all pulps indicating that monovalent as well a divalent exchange reaction ta e place hen the alts of weak acids are passe through cellulo e pulps. two relati ns ips were establishe : (1) a direct relationship between the number xidized 9carb x l and aldehyde) groups and the number of acid luble pent se unit in each pulp ( <) AN INVERSE RELATION IP ETWEEN THE UM OF THE NUMBER O ACID SOLUBLE PENTO E AND ALKALI SOLUBLE GLUCO E UNITS PER OXIDIZED GROUP AND THE DEGREE OF POLY ERIZATION EACH PULP. It was found that the strength reinforcement resulting from polymerization of mono ers in non swelling solvents in the presence of a cell l e matrix wa l st with the extractable polymer. The rheological e avi r o the treated material indicates that the strength reinforcement is due to a diti nal hydr gen b nds r e between the pol er and the cell l se fiber matrix. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1962
- Accession Number
- AD0291857
Entities
People
- R.b. Hoy
- R.m. Foose
Organizations
- SRI International