Cross-Linking Effect of Polyethylene-Polypropylene Blend Films Prepared by Gelation/Crystallization from Solution

Cross-linking of polyethylene-polypropylene blend films, prepared by gelation/crystallization from solutions, was done according to the following two methods. One was carried out under elongation of the blend gel films containing dicumyl-peroxide. The other was with electron-beam irradiation of the undrawn specimens and subsequently the specimens were elongated. The mechanical properties of the resultant specimens in undrawn and drawn states were found to become much weaker with increasing polypropylene content. This phenomenon was attributed to the considerable scission of main-chains of polypropylene. Consequently it turned out that both methods are appropriate for producing a net cross-linking effect of polyethylene occurring preferentially in the amorphous regions.

[1]  M. Matsuo,et al.  Morphological properties of ultrahigh molecular weight polyethylene−polypropylene blend films produced by gelation/crystallization from solutions , 1987 .

[2]  M. Matsuo,et al.  Development of high-modulus polyethylene with heat-resistant properties , 1987 .

[3]  Masaru Matsuo,et al.  Elastic modulus of isotactic polypropylene in the crystal chain direction as measured by x-ray diffraction , 1986 .

[4]  M. Matsuo,et al.  Crosslinking of ultrahigh-molecular weight polyethylene films produced by gelation/crystallization from solution under elongation process , 1986 .

[5]  M. Matsuo,et al.  Elastic modulus of polyethylene in the crystal chain direction as measured by X-ray diffraction , 1986 .

[6]  M. Matsuo,et al.  Dynamic mechanical behavior of ultradrawn polyethylene films produced by gelation/crystallization from solution , 1985 .

[7]  M. Matsuo,et al.  DEFORMATION MECHANISM OF DRY GEL POLYETHYLENE UP TO A DRAW RATIO OF 300 , 1984 .

[8]  A. Pennings,et al.  Crosslinking of ultra-high molecular weight polyethylene in the oriented state with dicumylperoxide , 1984 .

[9]  K. Miyasaka,et al.  Drawing of ultrahigh‐molecular‐weight polyethylene single‐crystal mats , 1984 .

[10]  T. Kanamoto,et al.  On Ultra-High Tensile Modulus by Drawing Single Crystal Mats of High Molecular Weight Polyethylene , 1983 .

[11]  A. Pennings,et al.  CROSSLINKING OF ULTRAHIGH STRENGTH POLYETHYLENE FIBERS BY MEANS OF GAMMA-RADIATION .2. ENTANGLEMENTS IN ULTRAHIGH STRENGTH POLYETHYLENE FIBERS , 1982 .

[12]  A. J. Pennings,et al.  Crosslinking of ultra-high strength polyethylene fibers by means of γ-radiation , 1981 .

[13]  Pj Piet Lemstra,et al.  Ultradrawing of high-molecular-weight polyethylene cast from solution. II.Influence of initial polymer concentration , 1981 .

[14]  P. Barham,et al.  Some observations on the production of polyethylene fibres by the surface growth method , 1980 .

[15]  A. Pennings,et al.  Ultra-high strength polyethylene by hot drawing of surface growth fibers , 1980 .

[16]  R. Porter,et al.  Extrusion of Polyethylene Single Crystals , 1979 .

[17]  H. Kawai,et al.  Rheo-optical studies on the deformation mechanism of semicrystalline polymers. IV. On the nature of alpha mechanical dispersion of low density polyethylene in relation to the mechanism of spherulite deformation†‡ , 1979 .

[18]  I. Ward,et al.  Melting behavior of ultrahigh modulus linear polyethylene , 1979 .

[19]  A. Pennings,et al.  Longitudinal growth of polymer crystals from flowing solutions II. Polyethylene crystals in Poiseuille flow , 1975 .

[20]  P. Flory,et al.  Melting Points of Linear-Chain Homologs. The Normal Paraffin Hydrocarbons , 1963 .