_____________ is not a polyester fiber?
_____________ is not a polyester fiber?
A. Terylene
B. Dacron
C. Nylon
D. Polyacrylonitrile
A. Terylene
B. Dacron
C. Nylon
D. Polyacrylonitrile
A. Vinyl acetate
B. Vinyl chloride
C. Propylene
D. Styrene
A. Polypropylene
B. Polystyrene
C. Polyester
D. Polyurethane
A. Polyolefins
B. Polyamide
C. Polyacrylate
D. Polyurethane
A. Ductile
B. Brittle
C. Malleable
D. None of these
A. Impart flexibility
B. Improve workability during fabrication
C. Develop new improved properties not present in the original resin
D. All A., B. and C.
A. Are made by addition polymerisation reaction only
B. Contain an epoxy group (fig bellow) at the ends of the polymer
C. Are cross-linked polymers only
D. Use emulsion polymerisation methods