Degradation of poly(methyl methacrylate) by deep uv (ultraviolet), x-ray, e-beam, and proton irradiations. Technical report
Technical Report
·
OSTI ID:5728736
The chemical changes in poly (methylmethacrylate) (PMMA) caused by irradiation with deep ultraviolet (UV), x-ray, electron, and proton beams were studied by gel permeation chromatography, Fourier-transform infrared, and UV spectroscopy. The quantitative analysis of spectroscopic changes (Beer's law) demonstrated a 1:1 correspondence between the disappearance of ester groups and the generation of double bonds in the polymer chain by all types of radiation. The ratio of main chain scission to changes in the number of ester groups and unsaturated bonds was compared to determine the characteristics of degradation of PMMA by the different types of radiation. This ratio for deep UV data was very close to the quantum yield of main chain scission of PMMA as reported in the literature. High-energy radiation was approx. 10 X more efficient than deep UV in a causing main chain scission with removal of fewer ester groups. Protons induced more main-chain scission the electrons. X-ray irradiation was the most efficient at causing main-chain scission of the four different types of radiation.
- Research Organization:
- Rensselaer Polytechnic Inst., Troy, NY (USA). Dept. of Chemistry
- OSTI ID:
- 5728736
- Report Number(s):
- AD-A-208517/3/XAB; TR--10
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360605 -- Materials-- Radiation Effects
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
BEAMS
CHEMICAL BONDS
CHEMICAL RADIATION EFFECTS
CHEMISTRY
CHROMATOGRAPHY
DOCUMENT TYPES
ELECTROMAGNETIC RADIATION
ELECTRONS
ELEMENTARY PARTICLES
ESTERS
FERMIONS
FOURIER TRANSFORMATION
GEL PERMEATION CHROMATOGRAPHY
INFRARED RADIATION
INTEGRAL TRANSFORMATIONS
IONIZING RADIATIONS
LEPTONS
NUCLEON BEAMS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PARTICLE BEAMS
PMMA
POLYACRYLATES
POLYMERS
POLYVINYLS
PROGRESS REPORT
PROTON BEAMS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
SEPARATION PROCESSES
SPECTROSCOPY
TRANSFORMATIONS
ULTRAVIOLET RADIATION
X RADIATION
360605 -- Materials-- Radiation Effects
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
BEAMS
CHEMICAL BONDS
CHEMICAL RADIATION EFFECTS
CHEMISTRY
CHROMATOGRAPHY
DOCUMENT TYPES
ELECTROMAGNETIC RADIATION
ELECTRONS
ELEMENTARY PARTICLES
ESTERS
FERMIONS
FOURIER TRANSFORMATION
GEL PERMEATION CHROMATOGRAPHY
INFRARED RADIATION
INTEGRAL TRANSFORMATIONS
IONIZING RADIATIONS
LEPTONS
NUCLEON BEAMS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PARTICLE BEAMS
PMMA
POLYACRYLATES
POLYMERS
POLYVINYLS
PROGRESS REPORT
PROTON BEAMS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
SEPARATION PROCESSES
SPECTROSCOPY
TRANSFORMATIONS
ULTRAVIOLET RADIATION
X RADIATION