Vinyl acetate

Abstract: Nonlinear viscoelastic properties are reported for composites of fumed silica with various surface treatments and matrices of poly(vinyl acetate) of different molecular weights as well as a copolymer matrix of vinyl acetate and vinyl alcohol. Data above the glass transition temperature are reported here. The increase in the composite storage and loss moduli measured at low strains, and their relative rates of decrease with strain, are found to depend on filler surface treatment. The nonlinear behavior of the loss factor with strain is dramatically altered by filler treatment and quite revealing as to the likely mechanism causing the nonlinearity. In addition, the relative reinforcement and the degree of nonlinearity are found to be the highest for the lowest molecular weight matrices. The effect of copolymer substitution for the homopolymer matrix is equivalent to an increase in molecular weight. The primary underlying mechanism for reinforcement and nonlinear behavior appears to be the filler−matrix inte...

Abstract: A description is given of an analytical temperature-rising elution fractionation (TREF) system for the purpose of determining short-chain branching (SCB) or copolymer distributions in poly-ethylenes and ethylene copolymers. The system achieves fractionation on the basis of crystallizability and is shown to be very little influenced by molecular weight in the normal high polymer range. Sample preparation by slow cooling from relatively dilute solution followed by continuous elution with a simultaneous and fairly rapid rate of temperature rise proves to be an efficient fractionation process. An on-line detector and data system allows application of a calibration curve to give realistic SCB distribution data in a convenient manner. The potential value of the TREF technique for providing structural information is illustrated by examples which include low-density high-pressure resins made by both tubular and autoclave reactors, high- and low-density resins made by low-pressure processes, and copolymers of ethylene with vinyl acetate and ethyl acrylate.

Abstract: Cloud-point data to temperatures of 270 °C and 3000 bar are presented for CO2 with the family of poly(acrylates) including methyl, ethyl, propyl, butyl, ethylhexyl, and octadecyl, with poly(butyl methacrylate), with poly(vinyl acetate), with statistically random copolymers of poly(ethylene-co-methyl acrylate) with 41, 31, and 18 mol % acrylate, with poly(tetrafluoroethylene-co-hexafluoropropylene) and poly(vinylidene-co-hexafluoropropylene) copolymers, each with ∼20 mol % hexafluoropropylene, and with Teflon AF. Over the same range of conditions, CO2 cannot dissolve polyethylene, poly(acrylic acid), poly(methyl methacrylate), poly(ethyl methacrylate), polystyrene, poly(vinyl fluoride), or poly(vinylidene fluoride). CO2 is a weak solvent that exhibits the temperature-sensitive characteristics observed with polar solvents. The solubility of a nonpolar hydrocarbon polymer or a copolymer in CO2 can be increased by at least partially fluorinating the polymer or by incorporating some polar groups into the backb...

Abstract: 1. INTRODUCTION Pressure-Volume-Temperature (PVT) Data: Equilibrium and Nonequilibrium States of Polymers Scope of This Data Collection Equipment for PVT Measurements: Piston-Die Technique Confining Fluid Technique Equipment Used for Data in This Book Experimental Procedures: Stan- dard PVT Runs Sample Preparation Determination of the Specific Volume at Ambient Conditions Data Interpretation: Tables and Graphs in This Collection Liquids Materials Undergoing a Glass Transition Materials Having a Melt Transition Filled Materials and Blends Application of PVT Data Empirical and Theoretical Fits to PVT Data References 2. HYDROCARBONS n-Undecane (C11H24) n-Tetradecane (C14H30) n-Hexadecane (C16H34) n-Tetracosane (C24H50) n-Hexatriacotane (C36H74) n-Tetratetracotane (C44H90) 3. HYDROCARBON POLYMERS Polyethylene (linear) Polyethylene (branched) Polyethylene wax (M ~2100) Polyethylene wax (M ~1000) Poly(propylene) (atactic) Polypropylene (atactic) Polypropylene (isotactic) Poly(1-butene) (atactic) Poly(1-butene) (isotactic) Poly(1-octene) Polyisobutylene (M ~ 4.2 x 105) Polyisobutylene (M ~ 300) Polyisoprene (hydrogenated) Poly(4-methyl pentene-1) Polynorbornene Hydrocarbon resin Poly(ethylene-co-propylene) (23% polypropylene) Poly(ethylene-co-propylene) (57% propylene) Poly(ethylene-co-propylene) (76% propylene) Poly(ethylene-co-propylene) (84% propylene) Polybutadiene (M ~ 2.33 x 105) Polybutadiene (cis & trans) Polybutadiene (cis) Polybutadiene (M ~ 3000) Polybutadiene (M ~ 1000) Natural rubber 4. ETHYLENE POLYMERS crylic acid) Poly(ethylene-co-methacrylic acid) (9% methacrylic acid) Poly(ethylene-co-methacrylic acid) (11.5% methacrylic acid) Poly(ethylene-co-methacrylic acid) (12% methacrylic acid) Poly(ethylene-co-methacrylic acid) (15% methacrylic acid) Poly(ethylene-co-methacrylic acid) (20% methacrylic acid) Ionomer (~ 1.5% Na) Ionomer (~ 2.2% Na) Poly(ethylene-co-acrylic acid) (9% acrylic acid) Poly(ethylene-co-acrylic acid) (10% acrylic acid) Poly(ethylene-co-acrylic acid) (20% acrylic acid) Poly(ethylene-co-vinyl alcohol) (56% vinyl alcohol) Poly(ethylene-co-vinyl alcohol) (62% vinyl alcohol) Poly(ethylene-co-vinyl alcohol) (70% vinyl alcohol) 5. STYRENICS Polystyrene (M ~ 1.1 x 105) Polystyrene (M ~ 34500) Polystyrene (M ~ 9000) Polystyrene (M ~ 910) Poly(4-chloro styrene) Poly(styrene-block-hydrogenated butadiene) 6. ACRYLICS Poly(methyl methacrylate) (M ~ 1 x 105) Poly(methyl methacrylate) (M ~ 40000) Poly(methyl methacrylate) (M ~ 25000) Poly(methyl methacrylate) (M ~ 10000) Poly(ethyl methacrylate) Poly(propyl methacrylate) Poly(n-propyl methacrylate) Poly(n-butyl methacrylate) Poly(n-hexyl methacrylate) Poly(lauryl methacrylate) Poly(isobutyl methacrylate) Poly(methyl acrylate) Poly(ethyl acrylate) Poly(n-propyl acrylate) Poly(n-butyl acrylate) Poly(acrylic acid) Poly(methacrylic acid) 7. POLYACRYLONITRILE AND COPOLYMERS Polyacrylonitrile Poly(styrene-co-acrylonitrile) (25% acrylonitrile) Poly(acrylonitrile-co-butadiene) (67% butadiene) Nitrile rubber compound 8. OTHER C-C MAIN CHAIN POLYMERS Poly(vinyl acetate) Poly(vinyl alcohol) Poly(vinyl butyral) Poly(vinyl carbazole) Poly(vinyl chloride) Poly(vinyl fluoride) Poly(vinyl formal) Poly(vinylidene fluoride) Poly(tetrafluoro ethylene) Fluoropolymer glass Fluoroelastomer compound Perfluoroelastomer compound 9. POLYETHERS Poly(methylene oxide) (homopolymer) Poly(methylene oxide) (copolymer) Poly(ethylene oxide) (M x105) Poly(ethylene oxide) (M ~ 18500) Poly(ethylene oxide) (M ~ 1540) Poly(ethylene oxide) (M ~ 600) Poly(ethylene oxide) (M ~ 300) Poly(ethylene oxide) mono methyl ether (M ~ 750) Poly(ethylene oxide) mono methyl ether (M ~ 350) Poly(ethylene oxide) dimethyl ether (M ~ 1000) Poly(ethylene oxide) dimethyl ether (M ~ 600) Poly(propylene oxide) (M ~ 4000) Poly(propylene oxide) (M ~ 2000) Poly(propylene oxide) (M ~ 1025) Poly(propylene oxide) (M ~ 400) Poly(propylene oxide) dimethyl ether (M ~ 2000) Poly(propylene oxide) dimethyl ether (M ~ 1025) Poly(propylene oxide) dimethyl ether (M ~ 400) Poly(hexafluoropropylene oxide) (M ~ 7000) Poly(hexafluoropropylene oxide) (M ~ 2000) Silicone fluid (commercial) Poly(dimethyl siloxane) (M ~ 1.5 x 106) Poly(dimethyl siloxane) (M ~ 2.24 x 105) Poly(dimethyl siloxane) (M ~ 17200) Poly(dimethyl siloxane) (M ~ 9670) Poly(dimethyl siloxane) (M ~ 3900) Poly(dimethyl siloxane) (M ~ 870) Poly(dimethyl siloxane) (M ~ 340) 10. POLYAMIDES Nylon 6 Nylon 7 Nylon 9 Nylon 11 Nylon 12 Nylon 4/6 Nylon 6/6 Nylon 6/6 (rubber toughened) Nylon 6/7 Nylon 6/8 Nylon 6/9 Nylon 6/10 Nylon 6/10 (pure) Nylon 6/12 Nylon 13/13 Nylon 6I/6T Aramid fiber 11. POLYESTERS Poly(ethylene adipate) Poly(ethylene succinate) Polycaprolactone Poly-L-lactide Poly(ethylene isophthalate) Poly(ethylene terephthalate) Poly(ethylene naphthenoate) Poly(butylene terephthalate) Bisphenol A isophthalate Polyarylate 12. VARIOUS MAIN CHAIN AROMATICS Polycarbonate Chloral polycarbonate Poly(2-6-dimethyl phenylene oxide) Phenoxy resin Polyetherimide Polyimide (film) Poly(ether ether ketone) Poly(ether sulphone) Polysulfone Poly(azomethine ether) (n = 4) Poly(azomethine ether) (n= 7) Poly(azomethine ether) (n= 8) Poly(azomethine ether) (n= 9) Poly(azomethine ether) (n= 10)Poly(azomethine ether) (n= 11) 13. BLENDS Polystyrenepoly(vinyl methyl ether) blend (90/10) Polystyrenepoly(vinyl methyl ether) blend (80/20) Polystyrenepoly(vinyl methyl ether) blend (70/30) Polystyrenepoly(vinyl methyl ether) blend (60/40) Poly- styrenepoly(vinyl methyl ether) blend (50/50) Polystyrenepoly(vinyl methyl ether) blend (40/60) Polystyrenepoly(vinyl methyl ether) blend (30/70) Polystyrenepoly(vinyl methyl ether) blend (20/80) Poly- styrenepoly(vinyl methyl ether) blend (10/90) Poly(2,6-dimethyl phenylene oxide)polystyrene blend (90/10) Poly(2,6-dimethyl phenylene oxide)polystyrene blend (80/20) Poly(2,6-dimethyl phenylene oxide)poly- styrene blend (70/30) Poly(2,6-dimethyl phenylene oxide)polystyrene blend (60/40) Poly(2,6-dimethyl phenylene oxide)polystyrene blend (50/50) Poly(2,6-dimethyl phenylene oxide)polystyrene blend (40/60) Poly(2,6-dimethyl phenylene oxide)polystyrene blend (30/70) Poly(2,6-dimethyl phenylene oxide)polystyrene blend (20/80) Poly(2,6-dimethyl phenylene oxide)polystyrene blend (10/90) Polyethersulphonepoly- (ethylene oxide) blend (40/60) Polyethersulphonepoly(ethylene oxide) blend (20/80) 14. MISCELLANEOUS Starch triacetate >Poly(ethylene-co-vinyl acetate) (14% vinyl acetate) Poly(ethylene-co-vinyl acetate) (18% vinyl acetate) Poly(ethylene-co-vinyl acetate) (25% vinyl acetate) Poly(ethylene-co-vinyl acetate) (28% vinyl acetate) Poly(ethylene-co-vinyl acetate) (33% vinyl acetate) Poly(ethylene-co-vinyl acetate) (40% vinyl acetate) Poly(ethylene-co-vinyl acetate) (65% vinyl acetate) Poly(ethylene-co-methacrylic acid) (4% metha