نتایج جستجو برای: poly vinyl chloride pvc
تعداد نتایج: 173386 فیلتر نتایج به سال:
Submit Manuscript | http://medcraveonline.com Abbreviations: GPC: Gel Permeation Chromatography; FTIR: Fourier Transform Infra Red; XRD: X Ray Diffraction; HRTEM: High Resolution Transmission Electron Microscopy; TGA: Thermo Gravimetric Analysis; IEC 60520: International Electronic Commission Number 60520; BS 7655: British Standard Number 7655; PMMA: Poly Methyl Methacrylate; PC: Poly Carbonate...
Poly(vinyl chloride) (PVC) suffers from photo-oxidation and photodegradation when exposed to harsh conditions. Application of PVC thus relies on the development ever more efficient photostabilizers. The current research reports synthesis new complexes tin their assessment as poly(vinyl three were obtained in high yields reaction 4-(benzylideneamino)benzenesulfonamide chlorides. Their structures...
Phthalates pose adverse health effects due to their propensity to leach and the most common, di(2-ethylhexyl) phthalate (DEHP) and di-n-octyl phthalate (DOP), are petroleum-based. Conversely, di-esters, succinates are biobased (produced from fermentation of biomass), biodegradable, and therefore potential sustainable replacements for phthalates. A series of succinates, di-octyl succinate (DOS),...
BACKGROUND Di-2-ethylhexyl phthalate (DEHP) are added to poly(vinyl chloride)(PVC) infusion tubes as a plasticizer to ensure tube flexibility. In addition to previously reported disadvantages of DEHP, released DEHP molecules from PVC tubes can easily interact with surfactants in anticancer drug solutions (i.e., polysorbate 80 for Taxotere®-Inj) and reduce the solubility of docetaxel in aqueous ...
In this research, two systems are studied. In the first system, the ratio of poly (methyl methacrylate) (PMMA) and poly (vinyl chloride) (PVC) is varied, whereas in the second system, the composition of PMMA-PVC polymer blends is varied with dopant salt, lithium bis (trifluoromethanesulfonyl) imide (LiTFSI) with a fixed ratio of 70 wt% of PMMA to 30 wt% of PVC. Oscillation tests such as amplitu...
The improvement in exposure conditions in the Swedish vinyl chloride producing industry is reported. The article comments on the technology and control methods by which the vinyl chloride concentration has been lowered to less than 1 ppm vinyl chloride. Two epidemiological retrospective cohort studies are presently under way on workers in PVC-utilizing industries and in the rubber industry.
The preparation and potentiometric pH response properties of membranes formulated with various aminated-poly(vinyl chloride) (PVC-NH2) products are described. Products containing secondary and/or primary amino functional groups are obtained by modifying PVC with monoand/or diamines, respectively. Blank membranes prepared with either type of aminated-polymer exhibit nearly Nernstian potentiometr...
poly(vinyl chloride) (PVC) plasticized with EDHadEven thoug ther reports had implied that certain formulations of PVC medical tubings (2,3) and containers would, in fact, release plasticizers as well as additives to solutions, little concern had been expressed as to the possible health consequences to humans from leaching of these agents. Since Jaeger and Rubin's publication, however, considera...
The relaxation by creep recovery of plasticized poly lvinyl chloride) (PVC) was tested in relation to applied stresses and working temperatures. The relaxation time increased with stress but decreased with temperature. From the temperature dependence of relaxation times, an energy of 0.21 eV was found to activate the creep recovery process. It is thought that creep recovery is effected by the c...
Internal plasticization of poly(vinyl chloride) (PVC) was achieved in one-step using copper-mediated atom transfer radical polymerization to graft different ratios random n-butyl acrylate and 2–2-(2-ethoxyethoxy)ethyl copolymers from defect sites on the PVC chain. Five polymers were made with poly(butyl acrylate) (PBA) poly(2–2-(2-ethoxyethoxy)ethyl (P2EEA); glass transition temperatures (Tg) f...
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