Metal-containing radiation-sensitive polymers
The copolymers of methyl methacrylate with alkali metal salts (Na, K, and Cs) of methacrylic acid have been prepared by saponification K, and Cs) of methylacrylic acid have been prepared by saponification of the homopolymer poly(methyl methacrylate), PMMA. Low degrees of hydrolysis have been achieved by a heterogeneous system, and from the infrared spectra it has been confirmed that the ester groups of the methyl methacrylates are directly converted to the metal salts of methacrylic acid. These ionomers exhibit pseudo high molecular weights in gel permeation chromatogram, but no appreciable increase in intrinsic viscosities is observed in comparison to PMMA. The coordinated inorganic polymers poly((dithio-2,2'-diacetato)bis(dimethylsulfoxide)dioxouranium(VI)) and poly()methylenebis(thio)-2,2'-bis(acetato))bis(dimethylsulfoxide)dioxouranium(VI))have been synthesized in dimethyl sulfoxide solution with about 90% yield. The degree of polymerization and the number of average molecular weights of these polymers have been assessed by high resolution nuclear magnetic resonance, with which the acetato end group to the bridging ligand group ratios have been determined. The polymers bridging ligand group ratios have been determined. The polymers have been characterized by employing various techniques: infrared spectra, thermal gravimetric analysis, /sup 13/C solid state nuclear magnetic resonance, and gel permeation chromatography. The prepared polymer samples have been subjected to various doses of /sup 137/Cs gamma radiation under which the polymers predominantly undergo chain scission. The radiation sensitivities of the polymers are assessed by G values which are obtained from gel permeation chromatograms. These uranyl polymers exhibit unusually high G values.
- Research Organization:
- Massachusetts Univ., Amherst (USA)
- OSTI ID:
- 6867334
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
ORGANOMETALLIC COMPOUNDS
RADIOSENSITIVITY
POLYMERS
CESIUM 137
CESIUM COMPOUNDS
CHEMICAL PREPARATION
G VALUE
GAMMA RADIATION
GEL PERMEATION CHROMATOGRAPHY
INFRARED SPECTRA
METHACRYLIC ACID
METHYL METHACRYLATE
MOLECULAR WEIGHT
NUCLEAR MAGNETIC RESONANCE
POLYMERIZATION
POTASSIUM COMPOUNDS
RADIOLYSIS
SAPONIFICATION
SODIUM COMPOUNDS
THERMAL GRAVIMETRIC ANALYSIS
URANIUM COMPOUNDS
ACTINIDE COMPOUNDS
ALKALI METAL COMPOUNDS
ALKALI METAL ISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CARBOXYLIC ACID ESTERS
CARBOXYLIC ACIDS
CESIUM ISOTOPES
CHEMICAL ANALYSIS
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
CHROMATOGRAPHY
DECOMPOSITION
ELECTROMAGNETIC RADIATION
ESTERS
GRAVIMETRIC ANALYSIS
HYDROLYSIS
IONIZING RADIATIONS
ISOTOPES
LYSIS
MAGNETIC RESONANCE
METHACRYLIC ACID ESTERS
MONOCARBOXYLIC ACIDS
NUCLEI
ODD-EVEN NUCLEI
ORGANIC ACIDS
ORGANIC COMPOUNDS
QUANTITATIVE CHEMICAL ANALYSIS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
RADIOISOTOPES
RESONANCE
SEPARATION PROCESSES
SOLVOLYSIS
SPECTRA
SYNTHESIS
THERMAL ANALYSIS
YEARS LIVING RADIOISOTOPES
400201* - Chemical & Physicochemical Properties
400600 - Radiation Chemistry