Poly(methyl methacrylate)-cellulose nitrate copolymers. II. Physical and mechanical properties
Poly(methyl methacrylate)-cellulose nitrate copolymers were prepared by bulk polymerization using benzoyl peroxide as initiator. Cellulose nitrates of two different nitrogen contents (11.4 and 12.2%) were used. The prepared copolymers were ..gamma..-irradiated for specified periods of up to 11.83 Mrad. Their physical and mechanical properties were measured before and after irradiation. The title copolymers showed lower modulus, tensile strength, and elongation at break than poly(methyl methacrylate) itself, but they showed better hardness and abrasian. Irradiation of up to 6.57 Mrad improved the modulus of the copolymers. Hardness and abrasion were improved by increasing cellulose nitrate content. The prepared copolymers that contained cellulose nitrate of 11.4% nitrogen showed secondary transition points. The increase of cellulose nitrate concentration shifted both first and second transition points to relatively higher values.
- Research Organization:
- National Research Centre, Cairo, Egypt
- OSTI ID:
- 6586729
- Journal Information:
- J. Appl. Polym. Sci.; (United States), Vol. 26:3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
CELLULOSE ESTERS
CHEMICAL RADIATION EFFECTS
HARDNESS
IMPACT STRENGTH
TENSILE PROPERTIES
THERMAL EXPANSION
PMMA
BENZOYL PEROXIDE
COMPARATIVE EVALUATIONS
COPOLYMERIZATION
COPOLYMERS
GAMMA RADIATION
NITRATES
CHEMICAL REACTIONS
CHEMISTRY
ELECTROMAGNETIC RADIATION
ESTERS
EXPANSION
IONIZING RADIATIONS
MECHANICAL PROPERTIES
NITROGEN COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
PEROXIDES
POLYACRYLATES
POLYMERIZATION
POLYMERS
POLYVINYLS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
360406* - Materials- Polymers & Plastics- Radiation Effects- (-1987)
400600 - Radiation Chemistry