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Polymer LDPE

Adiabatic Compression Heating Melting of polymers by adiabatic compression has been shown to be feasible for processes such as injection molding (2). Discuss this method, in principle, in terms of an order-of-magnitude analysis of the terms of the thermal energy balance for an amorphous (PS) and a semicrystalline polymer (LDPE). Use the data in Appendix A. [Pg.233]

The polymer has a low cohesive energy density (the solubility parameter 8 is about 16.1 MPaU2) and would be expected to be resistant to solvents of solubility parameter greater than 18.5 MPa1/2 (Chapter 4). Since polyethylene is a crystalline hydrocarbon polymer incapable of specific interaction, there are no solvents at room temperature. Materials of similar solubility parameters and low molecular weight will however cause swelling, the more so in low-density polymers. LDPE has a gas permeability in the range normally expected with rubbery materials. HDPE has a permeability of about one-fifth that of LDPE. [Pg.24]

Table 9-9 Partition coefficients of organic compounds between polymers (LDPE, PVC) and several ethanol/water-mixtures at 23 °C. Table 9-9 Partition coefficients of organic compounds between polymers (LDPE, PVC) and several ethanol/water-mixtures at 23 °C.
Polymer Products, Low and Medium Density Polyethylene, Equistar. (http //www.equistarchem.com/ html/polymer/ldpe/index.htm)... [Pg.221]

Zenkiewicz et blended five common polymers LDPE, HDPE, PP,... [Pg.286]

Despite the fact that polyethylene does not possess any tacticity, ethylene can be polymerised in the presence of stereo-specific initiators. Polyethylene obtained by this method is linear and highly crystalline (HDPE), whereas polymerisation of ethylene obtained by radical polymerisation leads to a branched and thus more amorphous polymer (LDPE), as shown in Section 3.4.4. [Pg.73]

Recommended for polymers LDPE, HOPE, PP, LDPE/EVA, suitable for PS, ABS, PET, PMMA ... [Pg.119]

See Ethylene Polymers, LDPE Ethylene Polymers, HDPE Ethylene Polymers, LED PE Vinyl Alcohol Polymers Vinyl Chloride Polymers Vinylidene Chloride Polymers (PVDC) Polyamides, plastics Polyesters, thermoplastic Propylene Polymers (PP) Methacrylic Ester Polymers Acrylonitrile Polymers Styrene Polymers (PS) Ionomers. [Pg.1489]

ETHYLENE POLYMERS, HOPE. See Volume 2. ETHYLENE POLYMERS, LDPE. See Volume 2. ETHYLENE POLYMERS, LLDPE. See Volume 2. ETHYLENE-ACRYLIC ELASTOMERS. See Volume 2. [Pg.2798]

See other pages where Polymer LDPE is mentioned: [Pg.123]    [Pg.464]    [Pg.472]    [Pg.204]    [Pg.465]    [Pg.473]    [Pg.178]    [Pg.104]    [Pg.219]    [Pg.536]    [Pg.1467]    [Pg.518]    [Pg.105]    [Pg.150]    [Pg.228]    [Pg.518]    [Pg.307]    [Pg.346]    [Pg.2821]    [Pg.2872]    [Pg.2873]    [Pg.2875]    [Pg.2876]    [Pg.2877]    [Pg.2878]    [Pg.2879]    [Pg.2880]    [Pg.2881]    [Pg.2882]    [Pg.2883]    [Pg.2884]    [Pg.2885]    [Pg.2886]    [Pg.2887]    [Pg.2888]    [Pg.2889]    [Pg.2890]    [Pg.2891]    [Pg.2892]    [Pg.2893]   


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