Journal ArticleDOI
Recent work on the thermal degradation of acrylate and methacrylate homopolymers and copolymers
TLDR
In this paper, an integrated mechanism for the thermal degradation of homopolymers and copolymers of acrylates and methacryls is presented, based on an accumulation of experimental results.Abstract:
The principal degradation reactions which occur in polymethacrylates are depolymerization to monomer and ester decomposition yielding methacrylic acid units in the polymer and liberating the corresponding olefin. The greater the number of β hydrogen atoms in the ester group the greater the tendency towards ester decomposition. There is also a strong tendency to ester decomposition in polyacrylates incorporating large numbers of β hydrogen atoms but the degradation processes which occur in primary esters are much more complex. The mechanisms of all these reactions are discussed. The behaviour of acrylate-methacrylate copolymers throws further light on these basic processes. In the light of an accumulation of experimental results an integrated mechanism for the thermal degradation of homopolymers and copolymers of acrylates and methacrylates is presented.read more
Citations
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Journal ArticleDOI
Crosslink density dependence of polymer degradation kinetics: Photocrosslinked acrylates
TL;DR: A series of crosslinked polyurethane acrylate films with glass transition temperatures ranging from −49°C to +65°C was prepared by photopolymerization of solvent-free resins as mentioned in this paper.
Journal ArticleDOI
Glass‐Transition‐, Melting‐, and Decomposition Temperatures of Tailored Polyacrylates and Polymethacrylates: General Trends and Structure–Property Relationships
Friederike Fleischhaker,Alexander P. Haehnel,Andrea Misske,Mathieu Blanchot,Sylke Haremza,Christopher Barner-Kowollik +5 more
TL;DR: In this article, the glass transition-, melting, and onset decomposition temperatures of a series of tailored polymethacrylates and polyacryls are systematically investigated.
Journal ArticleDOI
Characterization of Acrylic Resins
Oscar Chiantore,Massimo Lazzari +1 more
TL;DR: In this article, the chemical structures and compositions of commercial acrylic resins used for protection and consolidation of different substrates have been determined from analysis of the products obtained under controlled thermal decomposition of the samples, whereas the amounts of different components were established by NMR spectroscopy.
Journal ArticleDOI
The influence of comonomers on the degradation and flammability of polyacrylonitrile: Design input for a new generation of flame retardants
TL;DR: In this article, a series of homo-and copolymers of acrylonitrile was prepared under radical initiation in DMF solutions, and the thermal and flammability characteristics of these polymers were evaluated through thermogravimetric analyses (TGA), differential scanning calorimetry (DSC), and by limiting oxygen index (LOI) measurements.
Journal ArticleDOI
Thermal degradation of bromine-containing polymers—I: Poly(2-bromoethyl methacrylate)
TL;DR: In this article, a 50/50 copolymer of 2-bromoethyl methacrylate and methyl methacylate yields only a mixture of the two monomers.
References
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Journal ArticleDOI
The thermal decomposition of poly(t-butyl methacrylate)
D.H. Grant,N. Grassie +1 more
TL;DR: In this paper, the authors proposed a mechanism for the depropagation of poly(t-butyl methacrylate) using anhydric acid units in the ester decomposition phase.
Journal ArticleDOI
The photooxidation of polymers. IV. A note on the coloration of polystyrene
N. Grassie,N. A. Weir +1 more
TL;DR: In this article, it is suggested that the color in polystyrene is due to conjugated carbon-carbon unsaturation in the polystructure, but that the lack of mobility of the molecules within the rigid polymer films prevents long sequences of double bonds becoming coplanar and color consequently moving through the spectrum.
Journal ArticleDOI
Thermal degradation of poly(alkyl acrylates). I. Preliminary investigations
N. Grassie,J. G. Speakman +1 more
TL;DR: A qualitative survey of the thermal degradation reactions which occur in poly(ethyl acrylate), poly(n-propyl acryl) and poly(isopropyl acylate) has been made by using three thermal analytical methods: thermogravimetric analysis (TGA), thermal volatilization analysis (TVA), and the dynamic molecular still (DMS), all combined with infrared and mass spectrometry as mentioned in this paper.
Journal ArticleDOI
The thermal degradation of poly(methyl acrylate). Part II. The mechanism of chain breaking
G. G. Cameron,D. R. Kane +1 more
TL;DR: In this paper, a reaction mechanism involving initiation by random homolytic back-bone bond scission followed by a chain of free radical transfer reactions, inter-and intramolecular, is proposed.
Journal ArticleDOI
Observations on the thermolytic decomposition of poly(tert‐butyl acrylate)
TL;DR: In this article, the thermolytic decomposition of amorphous poly(tert-butyl acrylate) was investigated and the rate and activation energy for isobutylene evolution in both sections of the weightloss curve were not very different for tactic and atactic polymer modifications.