Changes in row structure of extruded polyethylene film in grafting with styrene. II. Copolymer morphology

Journal Article · Sun Jul 01 00:00:00 EDT 1979 · J. Polym. Sci., Polym. Chem. Ed.; (United States)

DOI:https://doi.org/10.1002/pol.1979.170170723· OSTI ID:6106121

Ungar, G; Dlugosz, J

The morphology of extruded high-density polyethylene film grafted with styrene was studied by transmission electron microscopy of thin stained sections. Near the film surface grafted polystyrene was confined to amorphous layers between lamellar crystals of polyethylene. In the film interior separate polystyrene domains were also formed and became predominant in grafting in diluted styrene. The deciding factor for the location of grafted polystyrene is the chain length because only long chains can coalesce in large separate zones. The polystyrene zones expand by cracking the stacks of lamellae along the lamellar normals. Straightening of the twisted crystalline lamellae of polyethylene occurred in grafting. Bubbles of styrene homopolymer were formed under conditions of high monomer concentration. The effect of staining the graft by the Kanig method was also discussed. 8 figures, 1 table.

• Research Organization: H.H. Wills Physics Lab., Bristol, England
• OSTI ID: 6106121
• Journal Information: J. Polym. Sci., Polym. Chem. Ed.; (United States), Vol. 17:7
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
POLYETHYLENES
CHEMICAL RADIATION EFFECTS
STYRENE
COPOLYMERS
ELECTRON MICROSCOPY
GRAFT POLYMERS
LAMELLAE
MORPHOLOGY
STRUCTURAL CHEMICAL ANALYSIS
AROMATICS
CHEMISTRY
HYDROCARBONS
MICROSCOPY
ORGANIC COMPOUNDS
ORGANIC POLYMERS
POLYMERS
POLYOLEFINS
RADIATION CHEMISTRY
RADIATION EFFECTS
360406* - Materials- Polymers & Plastics- Radiation Effects- (-1987)
400600 - Radiation Chemistry