9002-85-1 Usage
Chemical Properties
Different sources of media describe the Chemical Properties of 9002-85-1 differently. You can refer to the following data:
1. solid
2. Poly(vinylidene chloride) has a very regular structure:It is therefore a highly crystalline material and has a crystalline melting point
of about 200°e. At this temperature the polymer has a high rate of decomposition. Copolymerization reduces the molecular regularity and thus lowers
the softening point, which for 85% vinylidene chloride-15% vinyl chloride copolymer is about 140°C. Since crystallization is thermodynamically
favoured even in the presence of liquids of similar solubility parameter and
since there is little interaction between the polymer and any liquid, there are
no effective solvents at room temperature for the homopolymer. The copolymers, however, are soluble in ethers and ketones and the solutions may be
used for coating applications. The copolymers are resistant to most other
organic solvents and to acids; there is some attack by alkalis.Even in the copolymers there is extensive crystallization and so the
materials have high specific gravity (1.7 for 85% vinylidene chloride-15%
vinyl chloride copolymer) and low permeability to moisture vapour and
gases. The copolymers also have high tensile strengths, namely about 70 MPa
(10000 Ib/in2 ) for unoriented material and up to 290 MPa (40000 Ib/in2 ) for
oriented filament. It may be noted that the copolymers are not readily
plasticized as all but small amounts of plasticizer exude from the finished
product.The main application of the vinylidene chloride - vinyl chloride copolymers is for packaging film, which is made by extrusion and biaxial stretching.
The film has very good clarity, toughness and moisture and gas impermeability. The copolymers are also used for filaments, which are made by
melt extrusion and drawing. The filaments are used for such applications as
car upholstery, garden chair fabrics and filter cloths where toughness, durability and chemical resistance are required.The main use of the vinylidene chloride - acrylonitrile copolymers is as
coatings for materials such as cellophane, paper and polyethylene. The
coatings confer moisture and gas impermeability and they are heat-sealable.
Uses
PVDC has a number of
applications, including molding resins, extrusion resins,
multilayer film, rigid barriers, containers, lacquer resin,
vinylidene chloride copolymer latex and foams, resins for
solvent coating, lattices for coating, and pipes for chemical
processing.
Production Methods
PVDC polymerizes by both ionic and free-radical reactions.
Free-radical polymerization of PVDC may be by solution,
slurry, suspension, and emulsion methods. In copolymerization,
usually one component is introduced to improve the
processability or solubility of the polymer; others are added
to modify specific properties. Properties modified by copolymerization
depend on the content of components (structure,
amounts, and types).
Industrial uses
Because of its relatively low solubility anddecomposition temperature, Vinylidene Chloride Latex is widely used in the form of copolymerswith other vinyl monomers, such as vinyl chloride.The copolymers are employed as packagingfilm, rigid pipe, and as filaments for upholsteryand window screens.
Check Digit Verification of cas no
The CAS Registry Mumber 9002-85-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 9,0,0 and 2 respectively; the second part has 2 digits, 8 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 9002-85:
(6*9)+(5*0)+(4*0)+(3*2)+(2*8)+(1*5)=81
81 % 10 = 1
So 9002-85-1 is a valid CAS Registry Number.
InChI:InChI=1/C2H2Cl2/c1-2(3)4/h1H2
9002-85-1Relevant articles and documents
A Method for the Rapid Dechlorination of Low Molecular Weight Chlorinated Hydrocarbons in Water
Muftikian, Rosy,Fernando, Quintus,Korte, Nic
, p. 2434 - 2439 (1995)
1,1,2-Trichloroethylene (TCE), 1,1-dichloroethylene, cis and trans-1,2-dichloroethylene and tetrachloroethylene (PCE), at concentrations of 20 ppm in aqueous solutions were rapidly hydrodechlorinated to ethane (in a few minutes), on the surface of palladized iron in batch experiments that were performed in closed vials. No intermediate reaction products such as 1,1-dichloroethylene, 1,2-dichloroethylenes and vinyl chloride were detected at concentrations > 1 ppm either in the headspace or in solution. The chloromethanes, CCl4, CHCl3 and CH2Cl2 were also dechlorinated to methane on palladized iron; the CCl4 was dechlorinated in a few minutes, the CHCl3, in less than an hour and the CH2Cl2, in 4-5 h. These results indicate that an above-ground treatment method can be designed for the treatment of groundwater contaminated with low molecular weight chlorinated hydrocarbons.
Nitrogen-Doped Carbon-Assisted One-pot Tandem Reaction for Vinyl Chloride Production via Ethylene Oxychlorination
Chen, De,Chen, Qingjun,Fuglerud, Terje,Ma, Guoyan,Ma, Hongfei,Qi, Yanying,Rout, Kumar R.,Wang, Yalan
supporting information, p. 22080 - 22085 (2020/10/02)
A bifunctional catalyst comprising CuCl2/Al2O3 and nitrogen-doped carbon was developed for an efficient one-pot ethylene oxychlorination process to produce vinyl chloride monomer (VCM) up to 76 % yield at 250 °C and under ambient pressure, which is higher than the conventional industrial two-step process (≈50 %) in a single pass. In the second bed, active sites containing N-functional groups on the metal-free N-doped carbon catalyzed both ethylene oxychlorination and ethylene dichloride (EDC) dehydrochlorination under the mild conditions. Benefitting from the bifunctionality of the N-doped carbon, VCM formation was intensified by the surface Cl*-looping of EDC dehydrochlorination and ethylene oxychlorination. Both reactions were enhanced by in situ consumption of surface Cl* by oxychlorination, in which Cl* was generated by EDC dehydrochlorination. This work offers a promising alternative pathway to VCM production via ethylene oxychlorination at mild conditions through a single pass reactor.
Efficient Electrocatalysis for the Preparation of (Hetero)aryl Chlorides and Vinyl Chloride with 1,2-Dichloroethane
Liang, Yujie,Lin, Fengguirong,Adeli, Yeerlan,Jin, Rui,Jiao, Ning
supporting information, p. 4566 - 4570 (2019/02/14)
Although the application of 1,2-dichloroethane (DCE) as a chlorinating reagent in organic synthesis with the concomitant release of vinyl chloride as a useful byproduct is a fantastic idea, it still presents a tremendous challenge and has not yet been achieved because of the harsh dehydrochlorination conditions and the sluggish C?H chlorination process. Here we report a bifunctional electrocatalysis strategy for the catalytic dehydrochlorination of DCE at the cathode simultaneously with anodic oxidative aromatic chlorination using the released HCl as the chloride source for the efficient synthesis of value-added (hetero)aryl chlorides. The mildness and practicality of the protocol was further demonstrated by the efficient late-stage chlorination of bioactive molecules.
