EAA copolymer

The focus of this evaluation is on the results that were reported using four different resins [52] PC resin, LLDPE resin, EAA copolymer, and an LDPE resin. The shear viscosities for the resins at selected processing temperatures are shown in Pig. 7.17 and were modeled using the power law model provided by Eq. 7.42. The parameters for the model are given in Table 7.3. As shown in Pig. 7.17 and the n values in Table 7.3, the PC resin shear-thinned the least while the EDPE resin shear-thinned the most. The LLDPE and EAA resins have n values between those for the PC and LDPE resins. The melt density for the LDPE and LLDPE resins at 240 °C is 735 kg/mT The melt density of the EAA resin at 220 °C was 785 kg/m and the melt density of the PC resin at 280 °C was 1073 kg/mT... 

The metallic layers were examined either by conventional or cross-section TEM in a Jeol 200 Cx microscope. For the cross section preparation a sandwich of two laminates is made, glued face to face with an epoxy, cut in small pieces, mechanically polished, and then ion milled to a final TEM observation thickness. The plane section TEM sample are prepared by dissolving the PET in trifluoroacetic acid for 5 to 10 mn. The area observed, on plane section TEM, for the grain size calculation is close to 0.2 urn. For the adhesion measurements, test pieces consist of aluminum support (1 mm thick) double sided tape (Permacel P-94) PET (12pm) / evaporated aluminum/ ethylene acrylic acid (EAA) copolymer film. These laminates are prepared for the peel test by compression under 1.3 105 N.m2 at 120°C for 10 seconds. The peel test is performed by peeling the EAA copolymer sheet from the laminate in an INSTRON tensile tester at 180° peel angle and 5 cm min peel rate. 

Adhesion Dow Primacor copolymers are designed for lasting adhesion to aluminum foil and other polar substrates. Ethylene acrylic acid (EAA) copolymers also offer significant benefits as a sealants for packaging fatty and greasy products. 

Table 34-01. Physical Properties of Dow Primacor EAA Copolymer Film Compared with LLDPE, EVA, and Ionomer...

Ethylene-co-acrylicadd (EAA) copolymers represent a commercially important class of materials, due to their ease and low cost of production and multiple end-use applications [21]. By simply varying the add content in the polymer, the properties... 

A A 40 % Zn neutrahzed) (1-4) followed by blow molding with 90 % PE/DSC/SEM/rheology/permeation test/ mechanical properties/selective solvent extraction -i- FTIR for PA-EAA copolymer characterization Fan-Chiang 1997 Yeh et al. 1997... 

PC/HDPE/EAA/dibutyltin oxide catalyst Haake mixer/SEM/DSC/rheology/ formation of PC-EAA copolymer Yin et al. 2007... 

Escor Ethylene-acrylic acid, EAA, copolymers Exxon Chem... 

Otey has studied the interactions between the ethylene-acrylic acid (EAA) copolymer and gelatinised starch since 1977 [7-83]. 

The development of high strength thermoplastic adhesive copolymers of the EAA type containing reactive carboxyl groups has made it practical to bond insulation such as polyethylene to metal conductors to provide adequate bonding and long term environmental resistance. Frequently, the EAA copolymer is extruded around the cable. Peacock reports that when a layer of acrylic acid-ethylene copolymer (7 43) was extruded at 140°C over a flexible aluminum conductor followed by a layer of polyethylene insulation, the bond strength between the insulation and the conductor was 72 N/cm compared with 1.4 N/cm for a control assembly without the copolymer adhesive. There are numerous similar patent claims for insulated conductor cable. 

Ethylene Acrylic Acid (EAA) - EAA copolymers have poorer heat stability and are more expensive than EVA but have superior adhesion to metals and... 

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