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Tuesday, April 21, 2020 | History

2 edition of Chemiluminescence studies of degradation and stabilization of plasticized poly(vinyl chloride) found in the catalog.

Chemiluminescence studies of degradation and stabilization of plasticized poly(vinyl chloride)

Yelena Kann

Chemiluminescence studies of degradation and stabilization of plasticized poly(vinyl chloride)

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  • 26 Currently reading

Published .
Written in English


Edition Notes

StatementYelena Kann.
SeriesSussex theses ; S 5657
ContributionsUniversity of Sussex. School of Chemistry, Physics and Environmental Sciences. Centre for Theoretical Physics.
The Physical Object
Pagination179 leaves :
Number of Pages179
ID Numbers
Open LibraryOL16166115M

The aim of this Special Issue is to bring the attention of contributors and readers the various aspects of natural additives: their obtainment, modification, morphology, the characterization of their physical and chemical properties, the thermodynamics and kinetics of multicomponent polymer systems, their degradation and stabilization, the. Dioctyl phthalate (DOP or DnOP), used in flooring materials, carpets, notebook covers, and high explosives, such as Semtex. Together with DEHP it was the most common plasticizers. Diisooctyl phthalate (DIOP), all-purpose plasticizer for polyvinyl chloride, polyvinyl acetate, rubbers, cellulose plastics, and polyurethane. Diethyl phthalate (DEP). Publication date Series ACS symposium series ; Note "Sponsored by the Division of Polymer Chemistry." Papers presented at the symposium on 'Polymer performance degradation and materials selection' at the American Chemical Society (ACS) spring meeting held in March in Chicago, Ill. Another important factor in the thermal processing of PVA is the thermal stability of PVA. Nishino (3) used Poly(GEMA) to significantly improve the thermal stability of PVA and achieved the melt-pressed PVA film. In this article, the thermal stability of pure PVA and plasticized PVA was studied by TGA.


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Chemiluminescence studies of degradation and stabilization of plasticized poly(vinyl chloride) by Yelena Kann Download PDF EPUB FB2

We have shown before [16] [17][18] that chemiluminescence (CL) is a very sensitive technique for the analysis of thermal degradation and stabilization of PVC.

It is well established that the. To submit an update or takedown request for this paper, please submit an Update/Correction/Removal : Yelena Kann. Chemiluminescence studies of the thermooxidation of PEEK S. Brauman Lockheed Palo Alto Research Laboratory, Hanover Street, Palo Alto, California ‐ Read the latest articles of Polymer Degradation and Stability atElsevier’s leading platform of peer-reviewed scholarly literature.

Therefore, for PVC degradation studies, test condition selection and analysis of the results should be carefully carried out to avoid erroneous conclusions. In normal conditions, HCl produced during plasticized PVC processing is in contact with the polymeric material; therefore, the technological application of degradation studies requires the use of experimental equipment that resembles Cited by: However, it appeared tempting to investigate whether PVC degradation in air is chemiluminescent and whether a CL study could give useful information to guide selection of stabilisers.

This paper reports an investigation of CL from PVC and some applications in the investigation of stabilisation mechanisms and design of stabiliser by: Chemiluminescence as a Tool for Polyolefin Oxidation Studies. The oxidation of polymers such as polypropylene and polyethylene is accompanied by weak chemiluminescence.

Chemiluminescence from recombinant spider silk under thermo-oxidative degradation. Polymer Degradation and Stability, DOI: /egradstab Steeve Collin, Pierre-Olivier Bussière, Sandrine Therias, Jacques Lacoste.

The role of hydroperoxides in the chemiluminescence of oxidized polymers by: Deteriorative reactions occur during processing, when polymers are subjected to heat, oxygen and mechanical Polymer Degradation and Stability deals with the degradation reactions and their control which are a major preoccupation of practitioners of the many and diverse aspects of modern polymer technology.

This is to present a Special Issue devoted to “Degradation and Stabilization of Polymer-Based Materials”, including composites, nanocomposites, polymer blends and biodegradable resins.

a quantitative spectroscopic study of the bleaching phenomena occurring in plasticized formulations containing poly and studies on the change in the. Use this URL to cite or link to this record in EThOS: ?uin= Chemiluminescence (CL) has become a sensitive tool for the study of polymer degradation, induced by exposure to various factors, such us heat, UV-light and oxygen.

In this paper, the results obtained with this technique in the study of gelatine samples hydrolytically degraded under sterilisation conditions are. The photooxidation of an UV-cured polyurethane-acrylate adhesive, has been monitored through the use of chemiluminescence and fluorescence techniques.

Chemiluminescence analysis shows early stages of photooxidation in the adhesive when there is neither loss or change in the physical and chemical properties of the by: Abstract. The oxidation of polymers such as polypropylene and polyethylene is accompanied by weak chemiluminescence.

The development of sensitive photon counting systems has made it comparatively easy to measure faint light emissions and polymer chemiluminescence has become an important method to follow the initial stages in the oxidative degradation of polymers.

The full text of this article hosted at is unavailable due to technical difficulties. Chemiluminescence (CL) has become a sensitive tool for the study of polymer degradation, induced by exposure to various factors, such us heat, UV-light and oxygen.

2) To study the eff ect of blending poly (4-vinyl biphenyl), (PVBP) with phthalates and terephth alate plasticizer s on t he photo - stability, and to select the K.

Al Ani et al. Download Citation | Degradation Studies on PVC Plasticized Submitted to Gamma Radiation up to 50 KGy | Many of the applications require sterilization by gamma radiation. When polymeric materials. Booktopia has Progress in Polymer Degradation & Stability Research by Herbert W.

Moeller. Buy a discounted Hardcover of Progress in Polymer Degradation & Stability Research online from Australia's leading online : Hardcover. Provides a comprehensive overview of the science of polymer durability.

Discusses the molecular mechanisms of polymer aging and deterioration, emphasizing UV and thermal exposure environments. Describes a variety of analytical techniques for studying degradation, with special emphasis on chemiluminescence. Covers advances in the use of additives and other approaches for enhancing.

Intramolecular charge-transfer fluorescent probes have been used as physical enhancers of chemiluminescence. PET exhibits low chemiluminescence emission; however, in the presence of Coumarinthe energy transfer from thermally generated excited carbonyl to ground-state probe molecule takes place, giving rise to the fluorescence emission from coumarin.

Employing this method, Cited by:   Abstract. Due to their organic nature the most of polymers currently used in various applications in different areas of industry or household are characterized by a certain degree of stability on the environmental natural conditions leading to their by: 1.

The applicability of the CL technique in assistance with additive selection (e.g. HCl absorbers, phosphites) for providing a formulated compound with the required heat stability is demonstrated.

The usefulness of CL analysis is also demonstrated in building correlations with long-term weathering tests and thus minimising time for development of. Stabilization and Degradation of Polymers. Editor(s): David L.

Allara, Walter L. Hawkins. Kinetic Studies on Degradation in Polyimide Precursor Resins. DAVID E. KRANBUEHL, JEAN TAKEUCHI, Implications for Poly (vinyl chloride) Stabilization.

RICHARD G. PARKER and CHARLES J. CARMAN. Chap pp The thermal oxidation of polypropylene was probed, in situ, by a novel technique that simultaneously monitors chemically induced light emission (chemiluminescence) and changes in FTIR emission spectra of an oxidizing sample. The results obtained from this technique demonstrated that the chemiluminescence intensity (ICL) was proportional to the accumulation of carbonyl species formed Cited by: The Co-ordinated Research Project (CRP) on Stability and Stabilization of Polymers under Irradiation was initiated in based on the recommendation of the final Research Co-ordination Meeting on Radiation Damage to Organic Materials in Nuclear Reactors and Radiation Environment (IAEA-TECDOC) and the Advisory Group meeting organized in.

Study the Influence of UV-Irradiation on the Photo Stability of Pure and Plasticized Poly (4-Vinyl Biphenyl) in Solid Films. Materials Sciences and Applications08 (13), DOI: /msa   Abstract. The study of photo-degradation and stabilization of polymers has an extremely importance from academic, economic and environmental point of view and a better understanding of the mechanism of degradation and correlation between weathering external factors, such as wavelength and irradiation dose, temperature and humidity, and chemical, physical and Cited by: 3.

The basic autoxidation scheme (BAS), first used by Bolland and Bateman, has been widely applied to oxidation studies for almost 50 years. Steady-state kinetic analysis of this reaction scheme has always depended upon making the simplifying assumptions of long kinetic chain length and/or a specific ratio of termination rate constants.

A luminol-H2O2-HRP chemiluminescence system with high relative luminescent intensity (RLU) and long stabilization time was investigated. First, the comparative study on the enhancement effect of ten compounds as enhancers to the luminol-H2O2-HRP chemiluminescence system was carried out, and the results showed that 4-(imidazolyl)phenol (4-IMP), 4-iodophenol (4-IOP), 4-bromophenol (4.

Effects of Graphene Nanoplatelets and Reduced Graphene Oxide on Poly(lactic acid) and Plasticized Poly(lactic acid): A Comparative Study by Buong Woei Chieng 1,*, Nor Azowa Ibrahim 1, Wan Md Zin Wan Yunus 2, Mohd Zobir Hussein 3, Yoon Yee Then 1 and Yuet Ying Loo 4Cited by: degradation and stabilization.

Chemiluminescence observed during polymer oxidation can be used to study molecular relaxations,oxidation rates and the process of deformation and failure.

INTRODUCTION The study of the luminescence properties of small organic molecules has provided a vast. Sample Preparations. Poly[1,6-bis(o-carboxyphenoxy)hexanoate] (1) used for all samples was synthesized during one melt-condensation polymerization reaction and completely characterized by previously described methods.[1–4] The properties of the freshly prepared polymer are as follows: M w: 16, PDI:T g: 44 °C, T d: ° to storage, polymer 1 was ground Cited by: Influence of Epoxy-Amine Ratio on Degradation of Epoxy-Silica Hybrid Materials; The Use of Waste from a Catalytic Process as a Synergistic Agent in Flame Retardant Formulations: Mechanistic Studies; An Integral Study of Post-Processing Thermal Stability of Plasticized Poly (Vinyl Chloride) Compounds; Post-Consumed Pet and HDPE Bottles as.

In this paper the kinetics of thermal oxidation of isotactic polypropylene with some new mercaptotriazines is presented. Isothermal degradation of i-PP was studied by chemiluminescence in air at °C on polymer samples containing various concentrations of stabilizers (,and wt%).

Thermal degradation of neat PLA and PLA/1 wt% EPO blends takes place in a single weight loss step, which can be evidence from the DTG curves. The incorporation of EPO in PLA matrix has significantly affected the thermal degradation temperature by improving the thermal stability of the by:   In this study, we stabilized hydrogen peroxide deposited on a paper substrate using PVA.

Hydrogen peroxide is a useful reagent in enzyme ass 43 and chemiluminescence measureme The use of hydrogen peroxide, however, requires either a fresh solution or the preparation of PADs just prior to : Tuchpongpuch Boonpoempoon, Wanida Wonsawat, Takashi Kaneta.

It was reported in the literature that an increase in thermal stability of epoxidized oil-plasticized PLA was due to their good interaction and plasticizer dispersion within the PLA matrix [3,9,19]. Furthermore, the homogeneously and well dispersed EJO could act as a protective layer, which deterred the release of volatile degradation products Cited by: View Yelena Kann, PhD’S profile on LinkedIn, the world's largest professional community.

Yelena has 7 jobs listed on their profile. See the complete profile on LinkedIn and discover Yelena’s Title: Polymer science and engineering. The thermal stability of plasticized PLA films was investigated using a TA instrument TGA Q Each sample was weighed approximately 7 mg and placed in an alumina crucible and heated from room temperature to [degrees]C at heating rate in 10[degrees]C [] under nitrogen atmosphere with flow rate 50 mL [].

Wypych G Principles of thermal degradation PVC Degradation and Stabilization 3rd ed. ed G (Aut.) Wypych (Canada: ChemTec Publishing) 79– Wypych (Canada: ChemTec Publishing) 79– Crossref Google ScholarAuthor: Ali I Al-Mosawi, Kálmán Marossy. The CL as a means to study the photostabilization of polyurethane automotive coatings in connection with weathering exposure was first reported in by Dudler and Bolle.

(20) They showed that the CL method is suitable for the study of polyurethane degradation.Char residue of PVC was % at °C, the data reached % for PVCPEC. The reason for this is the fact that internally plasticized PVC materials have a higher relative carbon content than PVC, and that the thermal degradation process of internally plasticized PVC materials produces more char residue than PVC.