High-density polyethylene Marlex

Fig. 2.7. Drop off of doubled extinction angle 2"/ during stress-relaxation after cessation of steady shear flow according to Wales (59). Measurements on the melt of a high-density polyethylene (Marlex 6002) at a measurement temperature of 147° C. Shear rate of the steady shear flow q = 0.06 sec-1...

TABLE 13 Refractive index (w) and specific molar refrac-tivity of high-density polyethylene (Marlex 50)... 

Normal stress differences for a high density polyethylene (Marlex 6050) at 190°C. Total thrust between parallel disks (solid line)... 

Materials. Low density polyethylene (LDPE) was obtained from Dow Chemical Co., PE 510. High density polyethylene (HDPE) was obtained from Phillips Chemical, Marlex 6001. Polypropylene (PP) was obtained from Exxon Corp., Exxon PP 8216. Di-t.-butylperoxide, 99%, (DtBP) was obtained from Polysciences. Gaseous hexafluoroacetone vras obtained from Nippon Mektron Ltd., Japan. 

Phillips Marlex 6003, a high density polyethylene (Mw = 53,000 Mp = 18,000) possessing predominantly saturated end groups was irradiated to 4.0 Mrad in vacuum in pellet form as supplied. NBS 1475 is a commercial polyethylene containing 111 ppm of Irganox 1010. Other experiments involved heating in vacuum to 500 K for 24 h prior to irradiation to 3.0 Mrad at 500 K. The NBS 1475 sample required a greater amount of irradiation to reach the gel dose than did Marlex 6003. 

Irradiation of Marlex 6003 Polyethylene. Results of 13c NMR measurements on Phillips Marlex 6003 polyethylene both prior to and just following a 2.0 Mrad irradiation in vacuum and 298 K are presented in Table IV. The spectra from which these data were obtained are shown in Figures 4 and 5. These results indicate that irradiation of high density polyethylene in vacuum in the solid state reduces the concentration of terminal vinyl unsaturations and increases the concentrations of long chain Y branches, saturated end groups and trans double bonds. The H-link could not be detected following an irradiation of Marlex 6003 in the solid state. 

Materials. High density polyethylene (HDPE) having different molecular weights, and specific gravity of 0.951 (Marlex 5202, HXM 50100, made by Phillips 66 Co), were used for extrusion applications. Polyamides used were a semicrystalline copolyamide of adipic acid, hexamethylene diamine and caprolactam, and a copolyamide containing isophthalic acid as well. An anhydride modified polyethylene (3-5) as an interlaminar adhesive/compatibilizer was also used. The combinations are generally included in "Selar" barrier materials supplied by E. I. du Pont de Nemours Co. 

Ethylene CH2=CH2 Polyethylene (PE) High density polyethylene (HOPE) and low densit) polyethylene (LDPE) molded objects, tubing, film, electrical insulation, used for household products, insulators, pipes, toys, bottles, e.g., Alkathene, Lupolan, Hostalen, Marlex. 

FIG. 24 Extensional viscosity growth function vs time for Phillips Marlex 5502, high-density polyethylene. Strain rate, s 1, 0.0022 2, 0.005 3, 0.055 4, 1.10. (Data from Ref 61.)... 

High-density polyethylene HOPE Alathon, Eltex. Forar, Fortiflex, Hostalen, Marlex... 

High-density (linear) polyethylene marlex 50 loses both strength and ductility at relatively low doses. In general, rubber will harden upon being irradiated. However, butyl or Thiokol rubber will soften or become liquid with high radiation doses. 

High-density (linear) polyethylene marlex 50 loses both strength and ductility at relatively low doses. 

Marlex HHM 4903, Marlex HHM 5202. See Polyethylene, high-density Marlex HHM 5502. See Polyethylene Marlex HHM 5502-01 ST, Marlex HHM 5502 BN. See Polyethylene, high-density Marlex HHM TR-130, Marlex HHM TR-140. 

Marlex HLN-020-01. See Polypropylene Marlex HMN455a, Marlex HMN 55180. See Polyethylene, high-density Marlex HNS-080. See Polypropylene Marlex HXM 50100. See Polyethylene, high-density... 

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