Chlorinated terphenyl

When the additive consisted of an Aroclor (a chlorinated biphenyl or terphenyl), a poly(styrene glycol), or an abietic acid derivative, the tensile moduli of the films increased as the concentration of additive was increased to about 30%. In two films (from the bisphenol I and bisphenol A polymers), the modulus increased as the concentration of a chlorinated terphenyl increased even to 40%. Instead of becoming more flexible, as would be expected, the films became stiffen Most of these additives, incidentally, were viscous or very viscous oils. The effect of two Aroclors on the tensile moduli is shown in Figure 1. 

Chlorinated terphenyls are reductlvely dechIor1nated, but also undergo substantial photosubstitution In alcohol solvents ( ) In contrast to the low yield of substitution products from PCB. In the terphenyl series photosubstitution is believed to take place by attack of the nucleophile directly on the excited state with concomitant chloride ejection. Alkylated PCB molecules (chloroalkylenes), candidate PCB replacement compounds, exhibit UV electronic spectra nearly Identical to those of PCB yet photodegrade more rapidly (28). Another possible PCB substitute consists of a mixture of bis-(chlorophenyl)ethanes (Iralec) that also undergoes dechlorination and substitution reactions on Irradiation (32). 

Under Monsanto s Aroclor nomenclature system, each Aroclor is assigned a four digit number. The last two digits indicate the approximate percentage weight of chlorine in the product and the first two digits indicate the type of material as follows 12—chlorinated biphenyls 25—blend of chlorinated biphenyls and chlorinated terphenyls (75 25) 44—blend of chlorinated biphenyls and chlorinated terphenyls (60 40) and 54—chlorinated terphenyls. 

Fig. 4. Glass transition temperature dependence on the EBBA content for PC-EBBA system (curve 1). For comparison the plots Tg vs. contents of chlorinated terphenyl, chlorinated diphenyl and dibutyl phthalate in PC also are presented (curves 2, 3 and 4 respectively).

However, the change of Tg values is more pronounced than for chlorinated terphenyls. 

The Desmocoll polymers show compatibility with some or all of the following polymers to the extent that they give clear solutions and films phthalic resins, xylene-formaldehyde resin, cyclohexanone-formaldehyde resin, highly chlorinated terphenyl, terpene-phenolic resin, acetyl cellulose, nitrocellulose, nitrile rubber, chlorinated PVC, vinyl chloride-vinyl acetate copolymer, rosin esters and coumarone resin. 

Chlorinated terphenyls % Cl = 40-60) Poly(styrene glycol) Tri(ethylene glycol) ester of hydrogenated abietic acid Bisphenyl A-polysulfone ethers, polycarbonates Bisphenol A-polysulfone ethers, polycarbonates Bisphenol A-polysulfone ethers, polycarbonates... 

Trichlorobiphenyl - sunlight Chlorinated terphenyls - sunlight or black UV light in thin film... 

A typical construction sealant base composition contains 35-50% LP polymer. Chlorinated terphenyl or chlorinated paraffin were formerly included as an extender to lower cost at little sacrifice in elastomeric properties. However, for health reasons, they have been replaced by phthalate plasticizers. The plasti-... 

The Yusho rice oil which contained high levels of PCDF has recently been reported as containing significant quantities of chlorinated terphenyl, and also of chlorinated tetraphenyl [94]. 

Schnaak et al. [4] Polychlorinated terphenyls, naphthalenes, chloropesticides, halogenated hydrocarbon solvents, aromatic hydrocarbon solvents (BTEX), chlorobenzenes, poly aromatic hydrocarbons (EPA 610), phenols, chlorophenols, phthalates, petroleum hydrocarbons, LAS and nonylphenol (NP), organotin compounds and 2,4-dichloroaniline 1 pg/kg to 10 mg/kg for chlorine-contained compounds 10 pg/kg to 1 g/kg for solvent and phenols 1 mg/kg to 10 g/kg for EPA610, DEHP, LAS, and mineral oils Sewage sludge... 

Chlorinated polynuclear aromatic hydrocarbons 4.1.2.1 2,4",5-Trichloro-p-terphenyl... 

Chlorinated diphenyl oxide, 137 Hexabromobiphenyl, 591 Octabromobiphenyl, 591 Hydrogenated terphenyl, 386 Fpoxy Resins, 298 Portland cement, 594 Fuel oil 2, 352 Fuel oil 4, 352 Fuel oil 2-D, 352 Silica, amorphous-diatomaceous earth, 625... 

Goldstein JA, Safe S. 1989. Mechanism of action and structure-activity relationships for the chlorinated dibenzo-p-dioxins and related compounds. In Kimbrough, Jenson, eds. Halogenated biphenyls, terphenyls, naphthalenes, dibenzodioxins and related products Elsevier Science Publishers, 239-293. 

Quantitative Property-S T) Relationship Dickhut et al. [67] developed a QP-5VV(7 )R based on experimental mole fraction solubilities for alkylbenzenes, PAHs, PCBs, chlorinated dibenzofuranes and p-dioxins, and alkyl- and halo-substituted naphthalenes and p-terphenyls in the range 4 to 40°C ... 

Biphenyl and terphenyls may be regarded as substituted benzenes that undergo acylation, alkylation, halogenation, nitration, sulfonation, and other reactions common to benzene. The points of initial attack on chlorination, miration, and sulfonation of biphenyl occur at the 2- and 4-positions the latter group predominates. 

Zitko V, Hutzinger O, Choi PMK. 1972. Contamination of the Bay of Fundy - Gulf of Maine area with polychlorinated biphenyls, polychlorinated terphenyls, chlorinated dibenzodioxins, and dibenzofurans. Environ Health Perspect 1 47-50. 

PCTs are produced by a controlled chlorination of hydrocarbons [12]. The fully chlorinated perchloro-p-terphenyl is obtained from p-terphenyl by means... 

Plasticisers Chlorinated paraffin, hydrogenated terphenyls, phthalate esters, dipropylene glycol dibenzoate... 

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