Unplasticized poly vinyl chloride

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)... 

ISO 580 1990 Injection-moulded unplasticized poly(vinyl chloride) (PVC-U) fittings -Oven test - Test method and basic specifications ISO 727-1 2002 Fittings made from unplasticized poly(vinyl chloride) (PVC-U), chlorinated poly (vinyl chloride) (PVC-C) or acrylonitrile/butadiene/styrene (ABS) with plain sockets for pipes under pressure - Part 1 Metric series ISO 727-2 2002 Fittings made from unplasticized poly(vinyl chloride) (PVC-U), chlorinated poly (vinyl chloride) (PVC-C) or acrylonitrile/butadiene/styrene (ABS) with plain sockets for pipes under pressure - Part 2 Inch-based series ISO 1163-1 1995 Plastics - Unplasticized poly(vinyl chloride) (PVC-U) moulding and extrusion materials - Part 1 Designation system and basis for specifications ISO 1163-2 1995 Plastics - Unplasticized poly(vinyl chloride) (PVC-U) moulding and extrusion materials - Part 2 Preparation of test specimens and determination of properties ISO 1265 1979 Plastics - Polyvinyl chloride resins - Determination of number of impurities and foreign particles... 

ISO 3633 2002 Plastics piping systems for soil and waste discharge (low and high temperature) inside buildings - Unplasticized poly(vinyl chloride) (PVC-U)... 

ISO 4422-1 1996 Pipes and fittings made of unplasticized poly(vinyl chloride) (PVC-U) for water supply - Specifications - Part 1 General ISO 4422-2 1996 Pipes and fittings made of unplasticized poly(vinyl chloride) (PVC-U) for water supply - Specifications - Part 2 Pipes (with or without integral sockets)... 

ISO/TR 7073 1988 Recommended techniques for the installation of unplasticized poly (vinyl chloride) (PVC-U) buried drains and sewers ISO 7387-1 1983 Adhesives with solvents for assembly of PVC-U pipe elements -Characterization - Part 1 Basic test methods ISO 7508 1985 Unplasticized polyvinyl chloride (PVC-U) valves for pipes under pressure -Basic dimensions - Metric series... 

ISO 8361-2 1991 Thermoplastics pipes and fittings - Water absorption - Part 2 Test conditions for unplasticized poly(vinyl chloride) (PVC-U) pipes and fittings ISO 9393-2 1997 Thermoplastics valves - Pressure test methods and requirements - Part 2 Test conditions and basic requirements for PE, PP, PVC-U and PVDF valves ISO 9852 1995 Unplasticized poly(vinyl chloride) (PVC-U) pipes - Dichloromethane resistance at specified temperature (DCMT) - Test method ISO 9853 1991 Injection-moulded unplasticized poly(vinyl chloride) (PVC-U) fittings for pressure pipe systems - Crushing test... 

ISO 11468 1997 Plastics - Preparation of PVC pastes for test purposes - Dissolver method ISO 12092 2000 Fittings, valves and other piping system components made of unplasticized poly(vinyl chloride) (PVC-U), chlorinated poly(vinyl chloride) (PVC-C), acrylonitrile-butadiene-styrene (ABS) and acrylonitrile-styrene-acrylester (ASA) for pipes underpressure - Resistance to internal pressure - Test method... 

ISO 2507-2 1995 Thermoplastics pipes and fittings - Vicat softening temperature - Part 2 Test conditions for unplasticized poly(vinyl chloride) (PVC-U) or chlorinated poly(vinyl chloride) (PVC-C) pipes and fittings and for high impact resistance poly(vinyl chloride) (PVC-HI) pipes... 

Dispersions of vinyl acetate-ethylene copolymers have been used with success in bonding plasticized and unplasticized poly(vinyl chloride). 

Impact strength can be improved by other methods of modification—for example, by biaxial orientation of the material during or immediately after moulding. When transparent or translucent bottles are required in unplasticized poly(vinyl chloride) strength can be improved by including up to about 10% methyl-butadiene-styrene copolymers the bottles resulting retain a good finish. 

Improvements of clarity in transparent materials can be obtained in a variety of ways. If unplasticized poly(vinyl chloride) includes an impact modifier with refractive index matching that of the polymer it is possible to use thinner sections and so increase clarity, rates of output, and gloss. With polyolefins, similar results may be achieved by including a nucleating agent to accelerate crystallization even polypropylene, which normally is translucent, thus can be made in an almost clear form. 

Unplasticized poly(vinyl chloride) compositions can be extruded in transparent, translucent, or opaque forms—to give (as examples), film, flat or corrugated sheet, and profiles such as gutters, downpipes, and troughs. For uses such as pipework the extruded products may be fixed or joined with fittings injection moulded from the same or similar material. 

Extruder screws and the range of conditions available on a particular machine may be versatile enough for several materials and grades but if it is desired, say, to extrude polyamide 6.6 or an unplasticized poly(vinyl chloride) more consistent and satisfactory results can be obtained by fitting a dedicated screw designed specially for the material concerned. For polyamide 6.6, for example, the unit should be capable of generating higher temperatures than are needed for an amorphous thermoplastic. 

Inherently Stable Structure. Inherent stability of the polymer structure includes resins such as unplasticized poly (vinyl chloride) containing about 56% chlorine which is self-extinguishing and poly(vinylidene) chloride. 

Tabb, D. L. and Koenig, J. L. (1975). Fourier Transform Infrared Study of Plasticized and Unplasticized Poly(vinyl chloride). Macromolecules, 8(6), 929-934. 

Table A2.14 Characteristic peaks for unplasticized poly (vinyl chloride) ...

Following the trend of using PVC as matrix, research on the use of EFB as composite in PVC matrix was also reported. Bakar et at [37] used the EFB as filler in unplasticized poly(vinyl chloride) (PVC-U). They studied the effects of extracted EFB on the processability, impact and flexural properties of EFB/PVC-U composites. PVC-U resin, EFB and other additives were first dry-blended using a heavy-duty laboratory mixer and then milled into sheets on a two-roll mill before being hot-pressed and cut into impact and flexural test specimens. There were two kinds of EFB used in this experiment, which were extracted and xmextracted. The FTIR showed that the unextracted EFB contained oil residue, while the extracted one contained less oil residue. The results showed that both extracted and unextracted EFB decreased the fusion time and melt viscosity. However, the fusion time increased with the increase of extracted EFB content. Meanwhile, there was no significant difference in both the impact and flexural properties of extracted and xmextracted EFB. 

A. AbuBakar, A. Hassan, and A.EM. Yusof, Effect of oil palm empty fruit bunch and acrylic impact modifier on mechanical properties and processability of unplasticized poly(vinyl chloride) composites. Polym. Plast. Technol. Eng. 44,1125-1137 (2005). 

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