The thermal degradation of polysiloxanes—Part 4: Poly(dimethyl/diphenyl siloxane)

Grassië, N.; Francey, K.F.; Macfarlane, I.G.

doi:10.1016/0141-3910(80)90016-6

Cited by 108 publications

(60 citation statements)

References 20 publications

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“…This has been attributed to the increasing amount of combustible hydrocarbon in the sample with increasing chain length (Connell et al 2000). Similar to other ceramic coating materials, the weight of residue at the end of a burn is proportional to the polymer molecular weight (Grassie et al 1980). Glassel and Mellema (2006) revealed a formulation comprising a siloxane copolymer that reduced the amount of free water bound to the lignocellulosic structures of the treated wood.…”

Section: Silicon Based Compoundsmentioning

confidence: 71%

Flammability behaviour of wood and a review of the methods for its reduction

2013

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Wood is one of the most sustainable, aesthetically pleasing and environmentally benign materials. Not only is wood often an integral part of structures, it is also the main source of furnishings found in homes, schools, and offices around the world. The often inevitable hazards of fire make wood a very desirable material for further investigation. As well as ignition resistance and a low heat release rate, timber products have long been required to resist burnthrough and maintain structural integrity whilst continuing to provide protection when exposed to fire or heat. Various industry standard tests are thus required to ensure adequate protection from fire is provided. When heated, wood undergoes thermal degradation and combustion to produce gases, vapours, tars and char. In order to understand and alter the fire behaviour of wood, it is necessary to know in as much detail as possible about its processes of decomposition. Various thermal analysis and flammability assessment techniques are utilised for this purpose, including thermogravimetric analysis, cone calorimetry and the single burning item test. The results of such tests are often highly dependent on various parameters including changes to the gas composition, temperature, heating rate, and sample shape size. Potential approaches for fire retarding timber are reviewed, identifying two main approaches: char formation and isolating layers. Other potential approaches are recognised, including the use of inorganic minerals, such as sericrite, and metal foils in combination with intumescent products. Formulations containing silicon, nitrogen and phosphorus have been reported, and efforts to retain silicon in the wood have been successful using micro-layers of silicon dioxide. Nano-scale fire retardants, such as nanocomposite coatings, are considered to provide a new generation of fire retardants, and may have potential for wood. Expandable graphite is identified for use in polymers and has potential for wood provided coating applications are preferred.

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Section: Silicon Based Compoundsmentioning

confidence: 71%

Flammability behaviour of wood and a review of the methods for its reduction

2013

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“…The first degradation stage of the PC-silicone blends occurred before the major degradation step is due to decomposition of silicone. Since, the end groups of the silicone to be used contain a few hydroxyls, and these hydroxyl end groups in polymer chain induce depolymerization from chain ends, which is a low activation energy process [18][19][20]. This process is shown in Fig.…”

Section: Thermogravimetric Analysismentioning

confidence: 98%

The thermal degradation of bisphenol

Zhou

Yang

Zhou

2007

Journal of Analytical and Applied Pyrolysis

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“…During the heat treatment, the index for biphenyl was decreased by 14 units, which indicates that immobilization in this case proceeds via scission of phenyl groups. According to Grassie et al [15], scission of phenyl groups is catalyzed by silanol groups. These silanol groups occur as terminal groups in the polymer and on the h e d silica surface.…”

Section: Resultsmentioning

confidence: 99%

Examination of the properties of different 20% phenyl‐substituted polymethylsiloxane stationary phases for capillary chromatography

Hägglund

Blomberg

Janák

et al. 1991

J Microcolumn Separations

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Abstract. Three polysiloxanes, each having 20% phenyl substitution, have been evaluated for use as stationary phases in fused silica open tubular columns for gas and supercritical fluid chromatography. The columns were coated with PS-090 which had been treated in an aluminum pan in order to improve immobilization properties, OV-7, and a newly synthesized phase, Polymer S.Excellent columns were prepared with PS-090; however, treatment in the aluminum pan was an uncontrolled process, and the reproducibility of polarity may be questioned. For comparison, OV-7 could not be immobilized, but columns coated with this phase showed good thermal stability. The silanol terminated Polymer S was immobilized via a mechanism involving scission of phenyl groups; thus polarity was decreased after immobilization. However, columns for which Polymer S was immobilized in the presence of a cross-linking reagent maintained their polarity. Such columns showed very good chromatographic performance. These columns were applied to the separation of polynuclear aromatic compounds by GC and to the analysis of extracts from a thermomechanical pulping white water and lichen by SFC.

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The thermal degradation of polysiloxanes—Part 4: Poly(dimethyl/diphenyl siloxane)

Cited by 108 publications

References 20 publications

Flammability behaviour of wood and a review of the methods for its reduction

Flammability behaviour of wood and a review of the methods for its reduction

The thermal degradation of bisphenol

Examination of the properties of different 20% phenyl‐substituted polymethylsiloxane stationary phases for capillary chromatography

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