Untersuchungen zum Abbau von PVC‐Folien durch Wärme und Licht

Braun, Dietrich; Wolf, M.

doi:10.1002/apmc.1978.050700107

Cited by 24 publications

(5 citation statements)

References 10 publications

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“…13 C{ 1 H} NMR (CD2-Cl2): δ 163. 7,163.6,157.3,153.4,148.8,148.6,124.0,123.9,119.6,118.3,35.8 (CMe3),35.7 (CMe3),30.5 (CMe3),30.4 (CMe3),53.65;H,6.40;N,6.59. Found: C,53.56;H,6.58;N,6.20.…”

Section: Generation Of [{L 2 Pdme} 2 (µ-Cl)][b(c 6 F 5 ) 4 ] (2ad)mentioning

confidence: 99%

Reaction of Vinyl Chloride with Cationic Palladium Acyl Complexes

and

Jordan

2003

Organometallics

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Vinyl chloride (VC) reacts with the cationic Pd complexes [L2Pd(Me)(CO)][B(C6F5)4] (3a−d; L2 = Me2bipy, tBu2bipy, dppp, dmpe) and [L2Pd{C(O)Me}(CO)][B(C6F5)4] (4a−d) by 2,1-insertion of L2Pd{C(O)Me}(VC)+ intermediates to yield the O-chelated products [L2Pd{CHClCH2C(O)Me}][B(C6F5)4] (5a−d). 5a−d were characterized by NMR spectroscopy, and the molecular structures of 5a and 5b·CH2Cl2 were determined by X-ray crystallography. The VC 2,1-insertion regiochemistry is favored in part because the alternative L2Pd{CH2CHClC(O)Me}+ 1,2-insertion products would be destabilized by placement of the electron-withdrawing Cl and acyl substituents on the same carbon. In contrast to analogous nonhalogenated L2Pd{CHRCHR‘C(O)Me}+ species, 5a,c do not further react with CO, due to the stability of the chelate ring and the low migratory aptitude of the −CHClCH2C(O)Me group.

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Section: Generation Of [{L 2 Pdme} 2 (µ-Cl)][b(c 6 F 5 ) 4 ] (2ad)mentioning

confidence: 99%

Reaction of Vinyl Chloride with Cationic Palladium Acyl Complexes

and

Jordan

2003

Organometallics

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“…The evolved hydrochloric acid (HCl) was measured through the most sensitive method by continuous recording of the electrical conductivity. This method was described by Braun and Wolf . The amount of HCl evolved during the UV irradiation of PVC film was determined by applying the equation derived by Braun and Thallmaier .…”

Section: Methodsmentioning

confidence: 99%

Synthesis and evaluation of homopolymer and terpolymer based on phenyl salicylate as photostabilizers for rigid polyvinylchloride

Rabie

Nazer

Nada

2015

J Vinyl Addit Technol

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Terpolymer based on polymerizable derivative of phenyl 5-methacryloxy methyl salicylate (PMMS) methyl methacrylate (MMA)/2-hydroxyethyl methacrylate (HEMA)/ PMMS was synthesized and evaluated as a photostabilizer for rigid polyvinylchloride (PVC). Evaluation of stabilizing efficiency was carried out by measuring the induction period and the rate of dehydrochlorination by the continuous conductometric determination of the hydrochloric acid (HCl) evolved at 25 C under nitrogen in addition to the extent of discoloration. The results indicated that the stabilizing effect of this terpolymer increased upon increasing the stabilizer concentration and the content of the UV absorber units in the terpolymer. The prepared terpolymer showed higher stabilizing efficiency when compared to the homopolymer of the phenyl salicylate-based monomer and the commercial UV absorber, phenyl salicylate. Structural morphology of PVC/terpolymer blend was investigated using a scanning electron microscopy (SEM) and thermal properties of the blends were also studied using differential scanning calorimetry (DSC). J. VINYL ADDIT. TECHNOL., 23:70-77,

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“…The evolved HCl was measured through the most sensitive method by continuous recording of the electrical conductivity. This method was described by Braun and Wolf [11]. The amount of HCl evolved during the UV irradiation of PVC film was determined by applying the equation derived by Braun and Thallmaier [12].…”

Section: Methodsmentioning

confidence: 99%

Preparation and evaluation of some benzophenone terpolymers as photostabilizers for rigid PVC

Braun

Rabie

Khaireldin

et al. 2011

Vinyl Additive Technology

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Some terpolymeric stabilizers based on polymerizable derivatives of 2,4‐dihydroxy‐benzophenone were prepared and evaluated as photostabilizers for rigid poly(vinyl chloride) (PVC). The prepared terpolymers, namely, (methyl methacrylate)/(2‐hydroxyethyl methacrylate)/2‐hydroxy‐4‐methacryloxybenzophenone (MMA/HEMA/HBMA) and (methyl methacrylate)/(2‐hydroxyethyl methacrylate)/2‐hydroxy‐4‐(3‐methacryloxy‐2‐hydroxypropoxy)benzophenone (MMA/HEMA/PBMA), were characterized, and their structures were confirmed by GPC, thermogravimetric analysis, FTIR, and ultraviolet‐visible (UV–vis) spectroscopy. The results revealed that the stabilizing effect of these terpolymers increased upon increasing the stabilizer concentration and the content of UV absorber units in the terpolymers. Promising results were achieved, and the prepared terpolymers showed higher stabilizing efficiency than the corresponding monomeric UV absorbers of low molecular weight. J. VINYL ADDIT. TECHNOL., 2011.© 2011 Society of Plastics Engineers

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Untersuchungen zum Abbau von PVC‐Folien durch Wärme und Licht

Cited by 24 publications

References 10 publications

Reaction of Vinyl Chloride with Cationic Palladium Acyl Complexes

Reaction of Vinyl Chloride with Cationic Palladium Acyl Complexes

Synthesis and evaluation of homopolymer and terpolymer based on phenyl salicylate as photostabilizers for rigid polyvinylchloride

Preparation and evaluation of some benzophenone terpolymers as photostabilizers for rigid PVC

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