Stabilization of polyvinylchloride by phosphorus compounds

Verizhnikov, L. V.; Kirpichnikov, P. A.; Kolyubakina, N.S.; Mukmeneva, N. A.; Karpova, S.I.

doi:10.1016/0032-3950(71)90051-7

Cited by 4 publications

(4 citation statements)

References 2 publications

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“…The 1,1Ј-biphenyl-2,2Ј-diol, (Ϯ)-1,1Ј-binaphthyl-2,2Ј-diol, and (-)-(S)-1,1Ј-binaphthyl-2,2Ј-diol, purchased from Aldrich, were dried by azeotropic distillation with toluene. The 1,1Ј-biphenyl-2,2Ј-diyl phosphorochloridite, [41] (Ϯ)-1,1Ј-binaphthyl-2,2Ј-diyl phosphorochloridite, [42] (-)-(S)-1,1Ј-binaphthyl-2,2Ј-diyl phosphorochloridite, [43] 4-hydroxy-4Ј-nitroazobenzene (NHA), [44] PdCl 2 (MeCN) 2 [45] , and Mo-(CO) 4 (nbd) [46] were prepared according to literature methods.…”

Section: Methodsmentioning

confidence: 99%

Syntheses, Crystal Structures and Photophysical Measurements of Phosphite‐Substituted Schiff Base and Azobenzene Ligands

et al. 2010

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Organic chromophores with charge asymmetry may exhibit significant second‐order nonlinear optical (NLO) properties. Metal complexes have been used as the donor, the acceptor, or as the bridge in some of these chromophores. Metal complexes may also be useful in dipolar chromophore orientation and in the building of large molecular structures, but this approach remains largely unexplored. We herein report the syntheses and characterization of a novel class of phosphite‐containing chromophores, O2N‐1‐C6H4‐4‐CH=N‐1‐C6H4‐4‐OP(OC6H4)2 (2) and O2N‐1‐C6H4‐4‐X=N‐1‐C6H4‐4‐OP(OC10H6)2 [X = CH (3), N (4)], and their transition‐metal complexes, cis‐Mo(CO)4(2)2 (5), PdCl2(2)2 (6), and cis‐Mo(CO)4(3)2 (7). The X‐ray crystal structures of 2 and 5 show that coordination of the phosphite ligand to the metal atom does not alter the conformation of the chromophore. Hyper‐Rayleigh scattering (HRS) measurements of the compounds in 1,4‐dioxane at 1064 nm indicate that phosphite functionalization causes a small decrease in the β values of the Schiff‐base chromophores {β [esu]: 47 × 10–30 (1), 25 × 10–30 (2), 30 × 10–30 (3} and no change in the β value of the azo chromophore {β [esu]: 62 × 10–30 (4)}. The larger β values of the cis‐Mo(CO)4L2 complexes {β [esu]: 38 × 10–30 (5), 41 × 10–30 (7)} as compared to those of the ligands (2 and 3) are consistent with the 90° orientation of two chromophores in the complexes.

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Section: Methodsmentioning

confidence: 99%

Syntheses, Crystal Structures and Photophysical Measurements of Phosphite‐Substituted Schiff Base and Azobenzene Ligands

et al. 2010

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“…Organic phosphites are believed to perform the following functions: 19,[281][282][283][284][285][286][287][288][289][290][291][292][293][294][295][296][297] • HCl binding, • substitution of labile chlorine, • addition to double bonds, • metal chloride binding, • decomposition of peroxides, • improvement of transparency. If one compares these functions with, let's say, the action of tin stabilizers, it may be assumed that phosphites act in a similar fashion; the true effect is different.…”

Section: Mechanisms Of Actionmentioning

confidence: 99%

“…Addition of stabilizer, such as, for example, zinc stearate, preserves initial color for a period of time which depends on the amount of primary stabilizer in a complex way. Russian authors 23,283,284,288 proposed, based on reactions with model compounds, that the model chloroallylic group cannot react with phosphites, and only the ketochloroallyl group undergoes this reaction. This concentration depends on the entire formulation because it has to balance initial color and long-term stability.…”

Section: Mechanisms Of Actionmentioning

confidence: 99%

Principles of Stabilization

Wypych¹

2015

PVC Degradation and Stabilization

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“…Lately, Verizhnikov et al 3 have attempted a study of the reaction of tributyl phosphite and 4-chloro-2-pentene to be used as a model reaction for the phosphorylation of poly(viny1 chloride). From this study it was concluded that, except for phosphorylation, a side dehydrochlorination reaction occured also.…”

Section: Introductionmentioning

confidence: 99%

Modified chlorinated polypropylene as a polymer fire retardant additive in polyhydrocarbons

Koutinas

Kalfoglou

1983

J of Applied Polymer Sci

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SynopsisPartly modified chlorinated polypropylene (CPP) with dimethyl phosphonate side groups was prepared by reacting trimethyl phosphites and CPP a t 115°C (Arbuzov type reaction). Products having different phosphorus and chlorine content were obtained, and the reduction of numberaverage molecular weight M,, with the extent of the degree of substitution was studied. The dimethyl phosphonate groups incorporated were studied by IR spectroscopy (P-0-C a t 9.6 p and P -0 at 8 p). All products had a yellow color that may be attributed to double bond formation caused by a side dehydrochlorination reaction. Some differences of thermal stability were observed from the DSC and TGA thermograms, and no significant TK value changes between phosphorylated products and CPP were indicated in the thermomechanical spectra. The flame retardancy of the phosphorylated products and the blends obtained by the addition of partly phosphorylated CPP to polyhydrocarbons such as polyethylene (PE), polypropylene (PP), and polystyrene (PS) was studied using the oxygen index test. The flame retardancy of these blends was compared with the flammability of the same polyhydrocarbons containing CPP. From this comparison it is concluded that the partly phosphorylated CPP is more effective as a flame retardant additive for PE, PP, and PS than itself.

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Stabilization of polyvinylchloride by phosphorus compounds

Cited by 4 publications

References 2 publications

Syntheses, Crystal Structures and Photophysical Measurements of Phosphite‐Substituted Schiff Base and Azobenzene Ligands

Syntheses, Crystal Structures and Photophysical Measurements of Phosphite‐Substituted Schiff Base and Azobenzene Ligands

Principles of Stabilization

Modified chlorinated polypropylene as a polymer fire retardant additive in polyhydrocarbons

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Stabilization of polyvinylchloride by phosphorus compounds

Cited by 4 publications

References 2 publications

Syntheses, Crystal Structures and Photophysical Measurements of Phosphite‐Substituted Schiff Base and Azobenzene Li­gands

Syntheses, Crystal Structures and Photophysical Measurements of Phosphite‐Substituted Schiff Base and Azobenzene Li­gands

Principles of Stabilization

Modified chlorinated polypropylene as a polymer fire retardant additive in polyhydrocarbons

Contact Info

Product

Resources

About

Syntheses, Crystal Structures and Photophysical Measurements of Phosphite‐Substituted Schiff Base and Azobenzene Ligands

Syntheses, Crystal Structures and Photophysical Measurements of Phosphite‐Substituted Schiff Base and Azobenzene Ligands