ISSN:
1435-1536
Keywords:
Cellulose acetate
;
hydroxypropylcellulose
;
cross-linking
;
liquid-crystalline state
;
anisotropic state
;
novel orientation technique
;
oriented films
;
mechanical properties
;
maximum extensibility
;
tensile modulus
;
tensile strength
;
birefringence
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract The networks of cellulose acetate and hydroxypropylcellulose prepared in the first part of this investigation were studied with regard to their mechanical properties. The quantities of particular interest were increases in tensile modulus and tensile strength obtained by drying the swollen films under strain, both uniaxial and equi-biaxial. These increases or improvements in mechanical properties were determined as a function of polymer concentration during cross-linking, polymer molecular weight, degree of cross-linking, and elongation during drying. In all cases, the improvements increased with increase in elongation during drying, and the largest increases were obtained in the case of the highest molecular weight polymer which had been lightly cross-linked in dilute (isotropic) solutions. The extent of ordering in these systems was gauged approximately by measurements of birefringence, which were correlated with their tensile moduli and tensile strengths.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00659450
