Ethylene-co-vinylacetate

El-R. Kenawy, G. L. Bowlin, K. Mansfield, J. Layman, D. G. Simpsonc, E. H. Sanders., G. E. Wnek. 2002. Release of tetracycline hydrochloride from elecfrospun poly(ethylene-co-vinylacetate), poly(lactic acid), and a blend. Journal of Controlled Release, 81. pp. 57-64. 

Li M et al (2006) Co-electrospun poly(lactide-co-glycolide), gelatin, and elastin blends for tissue engineering scaffolds. J Biomed Mater Res A 79A(4) 963-973 Kenawy el R et al (2002) Release of leliacycline hydrochloride from electrospun poly (ethylene-co-vinylacetate), poly(lactic acid), and a blend. J Control Release 81(l-2) 57-64... 

Magnetic filed Ethylene -co-vinylacetate (EVAc) Insulin... 

Poly(maleic anhydride-alt-2-methoxyethylvinylether) Poly(lactide-glycolide), PLGA Poly(ethylene-co-vinylacetate)... 

Poly[ethylene-co-vinylacetate] PEVA M = 60.4 kDa 14 wt.% Drug delivery system... 

ASTM American Standard Test Method BS British Standard CAB Cellulose acetate butyrate DGEBA Diglycidyl ether of bisphenol A DSC Differential scanning calorimetry ENR Epoxidized natural rubber EVA Ethylene-co-vinylacetate EPDM Ethylene propylene diene monomer ESC Environmental stress cracking HDT Heat deflection/distortion temperature HDPE High-density polyethylene HIPS High -impact polystyrene... 

Poly(ethylene-co-vinylacetate) EVA, Polyethylene ionomer EIM, Cycloolefine copolymer COC [Poly(ethylene-co-norbornene)], Poly(ethylene-co-acrylic acid) EAA Polyolefines III... 

Fig. 3.3-10 Poly(ethylene-co-vinylacetate), EVA stress Fig. 3.3-11 Poly(ethylene-co-vinylacetate), EVA viscosity versus strain versus shear rate...

POLY(ETHYLENE-co-VINYLACETATE) EVAc is a random copolymer with the structure... 

Polymers in coexisting phases have different molar-mass distributions which are also different from that of the initial homogeneous system. Obviously, the influence of polydispersity on the LLE is not only of a quantitative nature but of a qualitative nature as well. This demixing behaviour is important for some practical problems, for example, in the high-pressure synthesis of low-density polyethene [polyethylene] or of poly(but-3-enoic acid ethene) [poly(ethylene-co-vinylacetate)]. The polyethene is obtained as a solute in supercritical ethene... 

The degree of blending of neutral PAT and a flexible polymer matrix, poly(ethylene-co-vinylacetate), was investigated. Phase separation is observed in blends with a copolymer with a high vinylacetate content. A homogeneous morphology is obtained at low PAT content when the blending copolymer contains 20% vinlyacetate [158]. 

The research for new materials with improved properties included novel reactive unsaturated interfacial modifiers for polyolefin-based composites. Some functional maleimides, such as 1,3-phenylene dimaleimide and different linear alkyl dima-leimides (Liauw et al. 2006), were investigated. Most of them were very effective interfacial modifiers in polypropylene and poly(ethylene-co-vinylacetate) (18% w/w vinylacetate)-based composites. 

A lightweight composite material with high electrical conductivity can be prepared by incorporation of polypyrrole in the pore of a porous divinylbenzene-crosslinked polystyrene host polymer, prepared by an emulsion polymerization method. The recorded conductivity of the composite was 0.5 S cm and the shielding effectiveness (SE) of the composite reach 26 dB at 1.0-2.0 GHz. Polypyrrole-poly(ethylene-co-vinylacetate) composites which possess good electrical and mechanical properties have been made in two steps first, a concentrated emulsion was... 

Fig. 5.29. Frequency- and temperature dependence of the dielectric loss associated with the -process in poly (ethylene-co-vinylacetate) with 17% vinylacetate units...

Fig. 8.7. Stress-extension curves measured for a sample of PE (M = 3.6 -10 ) at the indicated Hencky strain rates. Constant strain rates were realized by a registration of the strain at the location of a developing neck and a continuous readjustment of the applied tensile force, using an electronically controlled feedback circle. The broken line gives the cT22 (A)-curve measured for a poly(ethylene-co-vinylacetate)(27% vac-units, (j)c = 0.30). No strain rate dependence is observed for this rubbery material [85]...

Several authors studied the influence of the chemical composition on miscibility behavior of copolymer solutions. However, most of these studies were restricted to the measurement of cloud points which complicates theoretical treatment. One investigation [85] reports more complete phase diagrams, in terms of spinodals, cloud points, and critical points, of solutions of poly(ethylene-co-vinylacetate) (EVA) in di-phenylether. The EVA samples were commercial samples from different origins possessing broad molar mass distributions and vinyl acetate (VA) contents varying from 2.3 to 12.1 wt%. Samples with higher VA content could not be used because of the... 

Polybutyleneterephthalate (PBT) is of growing interest as a material for injection molding. In fact, its rate of crystallization is faster than that of the other widely used linear polyesters such as polyethyleneterephtha-late (PET). However, PBT shows a low impact resistance, particularly at low temperatures. For this reason the uses of PBT are limited. The usual method to overcome this limitation is to add a second elastomeric phase to the PBT matrix. Rubber modification of PBT has been realized by melt blending with preformed rubbers such as poly(ethylene-co-vinylacetate) (EVA) and poly(ethylene co-vinylalcohol) (EVOH) [71], or by adding end-capped polymers to produce a second flexible component during PBT polymerization. 

EVA Poly(ethylene-co-vinylacetate) PVC-U Poly(vinyl chloride), unplastisized... 

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