Structure and dose effects on ion beam modification of polymers

Conference · Tue Jan 01 04:00:00 EST 1991

OSTI ID:5913420

Rao, G R; Lee, E H; Mansur, L K

Polyethylene (PE), polypropylene (PP), polystyrene (PS) and polyethersulfone (PES) were implanted with 200 keV boron ions at three different doses. PS was also implanted with 100 keV boron. A nanoindentation technique and reciprocating sliding wear tests were used to characterize mechanical properties of the implanted polymers. The results showed that hardness increased with increasing dose as well as increasing energy. The relative increase in hardness was reduced with increasing complexity of the side groups of the polymer chains although absolute hardness values were higher. With increasing complexity of the main backbone polymer chain, the relative increase in hardness as well as numerical hardness values were lower. These effects were attributed to the relative contributions of cross-linking and chain scission, which were viewed as competing processes. Wear tests showed that in general, a low or intermediate implant dose yielded the best improvement in wear resistance. No specific trends were observed relating friction coefficient values and improved wear resistance.

• Research Organization: Oak Ridge National Lab., TN (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5913420
• Report Number(s): CONF-911202-43; ON: DE92006860
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360601 -- Other Materials-- Preparation & Manufacture
360603 -- Materials-- Properties
360605* -- Materials-- Radiation Effects
BORON IONS
CHARGED PARTICLES
FRICTION
HARDNESS
ION IMPLANTATION
IONS
MATERIALS
MECHANICAL PROPERTIES
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PHYSICAL RADIATION EFFECTS
PLASTICS
POLYETHYLENES
POLYMERS
POLYOLEFINS
POLYPROPYLENE
POLYSTYRENE
POLYVINYLS
RADIATION EFFECTS
SYNTHETIC MATERIALS
WEAR