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Plasticizer migration, poly

Plasticizers. Plasticizers are materials that soften and flexibilize inherently rigid, and even britde polymers. Organic esters are widely used as plasticizers in polymers (97,98). These esters include the benzoats, phthalates, terephthalates, and trimeUitates, and aUphatic dibasic acid esters. Eor example, triethylene glycol bis(2-ethylbutyrate) [95-08-9] is a plasticizer for poly(vinyl butyral) [63148-65-2] which is used in laminated safety glass (see Vinyl POLYMERS, poly(vinyl acetals)). Di(2-ethyUiexyl)phthalate [117-81-7] (DOP) is a preeminent plasticizer. Variation of acid and/or alcohol component(s) modifies the efficacy of the resultant ester as a plasticizer. In phthalate plasticizers, molecular sizes of the alcohol moiety can be varied from methyl to tridecyl to control permanence, compatibiUty, and efficiency branched (eg, 2-ethylhexyl, isodecyl) for rapid absorption and fusion linear (C6—Cll) for low temperature flexibiUty and low volatility and aromatic (benzyl) for solvating. Terephthalates are recognized for their migration resistance, and trimeUitates for their low volatility in plasticizer appHcations. [Pg.396]

Castle L, Gilbert J, Eklund T (1990) Migration of plasticizer from poly(vinyl chloride) milk tubing. Food Addit Contam 7 591-596... [Pg.334]

Polymer Science Series B 44, Nos. 1-2, Jan./Feb.2002, p.45-9 IR SPECTROSCOPY STUDY OF PLASTICIZER MIGRATION FROM POLY(VINYL CHLORIDE)-BASED COMPOSITIONS... [Pg.81]

Cell morphology of foamed PVC depends on concentration of a plasticizer, surface treatment of filler and foaming time and temperature. High concentrations of plasticizers produced poly disperse cell structure. Polyester plasticizer blends are useful for production of heat-shrinkable film. Plasticizer migration from geomembranes causes membrane shrinkage. ... [Pg.265]

Other Addition Polymers. There are few studies on other reported polymer and plastic components of landfills. Poly(vinyl chloride) seems to be inert in landfill showing no degradation in real-world tests (23,24) and laboratory simulations (25). In the latter study, plasticizer migration occinred with its subsequent biodegradation. [Pg.2090]

The photo-dechlorination of poly(vinyl chloride) in the presence of plasticizers is accompanied by chain scission and crosslinking. Photocrosslinking of poly(vinyl chloride) decreases plasticizers migration in flexible films, to only limited extent [606, 1693]. [Pg.180]

CPA. Copolymer alloy membranes (CPAs) are made by alloying high molecular weight polymeries, plasticizers, special stabilizers, biocides, and antioxidants with poly(vinyl chloride) (PVC). The membrane is typically reinforced with polyester and comes in finished thicknesses of 0.75—1.5 mm and widths of 1.5—1.8 m. The primary installation method is mechanically fastened, but some fully adhered systems are also possible. The CPA membranes can exhibit long-term flexibiHty by alleviating migration of the polymeric plasticizers, and are chemically resistant and compatible with many oils and greases, animal fats, asphalt, and coal-tar pitch. The physical characteristics of a CPA membrane have been described (15). [Pg.213]

ISO 105-X10 Textiles - Tests for colour fastness - Part XIO Assessment of migration of textile colours into polyvinyl chloride coatings ISO 264 1976 Unplasticized polyvinyl chloride (PVC) fittings with plain sockets for pipes under pressure - Laying lengths - Metric series ISO 265-1 1988 Pipes and fittings of plastics materials - Fittings for domestic and industrial waste pipes - Basic dimensions Metric series - Part 1 Unplasticized poly(vinyl chloride) (PVC-U)... [Pg.322]

Polyacrylonitrile plastic bottles for soft drinks and beer were taken off the market as possible carcinogens because of migration of acrylonitrile into the drink. Now most plastic food containers of this type are poly(ethylene terephthalate). [Pg.485]

Di(2-ethylhexyl) adipate is a liquid of low volatility, widely used as a plasticizer in flexible poly(vinyl chloride) products, notably food films, as well as in other plastics and in a number of other minor applications, such as lubricants and cosmetics. Occupational exposure may occur by inhalation of di(2-ethylhexyl) adipate as an aerosol during its manufacture and its use. Meat-wrapping workers may be exposed while cutting poly(vinyl chloride) film across a heated cutter. Food is the major source of exposure of the general population to di(2-ethylhexyl) adipate because of migration from poly(vinyl chloride) packaging, particularly into fatty foods such as cheese and meat. [Pg.168]

Migration of ions through the plasticizer is frequently considered to be a function of the mobility of the plasticizer itself (2,5). In many electrical applications, where fugitive monomeric plasticizers like DOP can cause damage, they can be replaced by non-fugitive polymeric plasticizers such as viscous liquid polyesters. Comparison of DOP vs. a typical polymeric plasticizer, Rohm Haas Paraplex 0-25 poly (propylene sebacate), showed no significant improvement in volume resistivity (Table VI), particularly when its lower plasticizing efficiency was considered. Thus plasticizer mobilitv alone does not help us explain volume resistivity (5). [Pg.151]

Ethanol and aqueous ethanol mixtures play important roles as food simulants for the determination of migration of substances from packaging into foods. Depending on the polarity of the plastic one can use pure ethanol (for nonpolar plastics) or aqueous ethanol mixtures up to 50/50 % (for polar plastics) as alternative simulants to edible oils (see Chapters 9,10 and 11). The estimation of partition coefficients in poly-mer/simulant systems is consequently of practical importance. It is possible to do this for polyolefins in contact with alcohol and aqueous alcohol mixtures with the help of an equation analogous to Eq. (4-100) (Piringer, 1993) ... [Pg.115]

Castle, L., Mayo, A., Crews, C., Gilbert, J., 1989, Migration of poly(ethylene terephthalate) (PET) oligomers from PET plastics into foods during microwave and conventional cooking and into bottled beverages. Journal of Food Protection 52 (5) 337-342.15. [Pg.390]

THERMAL DEGRADATION OF POLY(VINYL CHLORIDE) PLASTISOLS BASED ON LOW-MIGRATION POLYMERIC PLASTICIZERS... [Pg.85]

See other pages where Plasticizer migration, poly is mentioned: [Pg.378]    [Pg.127]    [Pg.274]    [Pg.41]    [Pg.396]    [Pg.517]    [Pg.4]    [Pg.301]    [Pg.123]    [Pg.287]    [Pg.483]    [Pg.421]    [Pg.200]    [Pg.128]    [Pg.364]    [Pg.40]    [Pg.51]    [Pg.282]    [Pg.2655]    [Pg.43]    [Pg.162]    [Pg.166]    [Pg.170]    [Pg.175]    [Pg.626]    [Pg.120]    [Pg.433]    [Pg.861]   
See also in sourсe #XX -- [ Pg.167 ]

See also in sourсe #XX -- [ Pg.167 ]



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