Poly PVOH

Water-Soluble Films. Water-soluble films can be produced from such polymers as poly(vinyl alcohol) (PVOH), methylceUulose, poly(ethylene oxide), or starch (qv) (see Cellulose ethers Polyethers Vinyl polymers). Water-soluble films are used for packaging and dispensing portions of detergents, bleaches, and dyes. A principal market is disposable laundry bags for hospital use. Disposal packaging for herbicides and insecticides is an emerging use. [Pg.378]

Poly(vinyl chloride) (PVC) Poly(vinylidene chloride) (PVDC) Poly (vinyl alcohol) (PVOH) Poly(vinyl acetal)... [Pg.147]

PS PSF PSU PTFE PU PUR PVA PVAL PVB PVC PVCA PVDA PVDC PVDF PVF PVOH SAN SB SBC SBR SMA SMC TA TDI TEFE TPA UF ULDPE UP UR VLDPE ZNC Polystyrene Polysulfone (also PSU) Polysulfone (also PSF) Polytetrafluoroethylene Polyurethane Polyurethane Poly(vinyl acetate) Poly(vinyl alcohol) poly(vinyl butyrate) Poly(vinyl chloride) Poly(vinyl chloride-acetate) Poly(vinylidene acetate) Poly(vinylidene chloride) Poly(vinylidene fluoride) Poly(vinyl fluoride) Poly(vinyl alcohol) Styrene-acrylonitrile copolymer Styrene-butadiene copolymer Styrene block copolymer Styrene butadiene rubber Styrene-maleic anhydride (also SMC) Styrene-maleic anhydride (also SMA) Terephthalic acid (also TPA) Toluene diisocyanate Ethylene-tetrafluoroethylene copolymer Terephthalic acid (also TA) Urea formaldehyde Ultralow-density polyethylene Unsaturated polyester resin Urethane Very low-density polyethylene Ziegler-Natta catalyst... [Pg.960]

For example, poly(vinyl alcohol) (PVOH) finds application as an effective adhesive for paper products such as the old-fashioned postage stamps or envelopes. Licking the stamp or envelope flap causes the adhesive to become sticky because water plasticizes the PVOH and lowers the Tg below room temperature. On pressing the stamp to a piece of paper, the polymer chains can entangle and hydrogen bond with the cellulose in the paper. As the water... [Pg.174]

In the second major use of VAM, PVA is converted to poly(vinyl alcohol) (PVOH) by a transesterification reaction with methanol, giving methyl acetate as coproduct. PVOH finds its major end use in textile sizing and adhesives. Further reaction of PVOH with butyraldehyde or formaldehyde gives polyvinyl butyral (PVB) or polyvinyl formal, which together constitute the third largest consumption of VAM. PVB is used almost exclusively in the adhesive laminating inner layer in safety glass. [Pg.367]

PVAl poly(vinyl alcohol) also PVOH is sometimes used... [Pg.717]

As host polymer matrices we used poly(alkyl methacrylate)s with various ester groups (methyl PMMA, ethyl PEMA, isopropyl PiPMA, normalpropyl PnPMA, isobutyl PiBMi normjdbutyl PnBMA), poly(methyl acrylate), polyethylene (PE), poly(vinyl chloride) (PVQ, poly(vinylidene chloride) (PVDQ, j lyfvinyl alcohol) (PVOH), polystyrene (PS), polycarbonate (PQ, phenolphthalein polyedier-ketone (PEK-Q, and phenolphthalein polyether-sulfone (PES-C). [Pg.174]

The poly(vinyl alcohol) (PVOH) used in this study is Elvanol grade HV from DuPont chemicals. The material is derived from poly(vinyl acetate) (PVAc) by hydrolysis and is in powder form as received. The degree of hydrolysis for Elvanol HV is 99.8% (0.2% residual acetate groups). The molecular of the material used in this investigation is Mw =105,600 - 110,000. PVOH films were produced as described elsewhere 14). Samples were drawn in tension at a strain rate of 1.4 x 10 sec to a maximum draw ratio = 3.08 at 22 C. As-cast material has an equilibrium water content of 5.3 wt% at 22 C and 50% relative humidity (RH) giving a Tg value of 3rc. The HOPE is Hoechst unfractionated Hostalen GF 7660, Mw = 1.06x10 M = 1.01x10. Hydrostatic extrudon, with extrusion temperatures from 60-100 C and strain rates from 2.5 x 10 sec tol.4 x 10 sec" was us to vary draw ratio (die size was varied) with a maximum draw ratio Xm = 16. The maximum draw ratios were limited by fracture. [Pg.288]

In practice, the techniques of blending, compositing and nano-reinforcement are often used together. Thermoplastic starch/poly(vinyl alcohol) (PVOH)/clay nanocomposites exhibited the intercalated and exfoliated structures [260]. Mont-morillonite (MMT) with three types of cation or modifier (Na", alkyl ammonium ion, and citric acid) was examined. The prepared nanocomposites with modified montmorillonite indicated a mechanical improvement in the properties, in comparison with pristine MMT. [Pg.147]

Procedures. The first step in indicator immobilization is to react poly(vinyl alcohol) (PVOH) with cyanuric chloride in acetone/water as described earlier (1). The PVOH/cyanuric chloride conjugate is then reacted with 10 mLs of a solution of indicator in acetone. For pH sensing, the indicator solution contained 100 mg of fluoresceinamine. For Mg(II) sensing, the indicator solution typically contained 100 mg... [Pg.274]

Tensile Mechanical Properties of poly(vinyl alcohol) (PVOH) and PAM Homopolymers and Their Blends at Equal Contents before and after Gamma Irradiation at a Dose of 100 kGy (Standard Deviations Are Omitted)... [Pg.269]

In practice, dewatering is a complex process. Sandas and Salminen (43) have evaluated different co-binders and their effects on dewatering and suspension viscosity and attempted to correlate to runnability. These authors noted that starch, with good water retention, has excellent runnability, even with relatively high viscosity. On the other hand, poly (vinyl alcohol) (PVOH) performed poorly because of high viscosity, whereas some synthetic thickeners also did so because of poor water retention. [Pg.152]

PVAL Poly (vinyl alcohol) (also PVOH)... [Pg.370]

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