Weathering of glass

Weathering of Glass Reinforced Plastics , PLASTEC Rept 24 (1966) 10) N.E. Beach,... 

K Tanaka, Weatherability of glass fibre reinforced polyester sheets . Proceedings 42nd Annual Conference SPI, 1987, Session 10-A. 

M M Qayyum and J R White, Weathering of glass fibre reinforced polystyrene and poly(ethersulfone) , Polym Compos 1990 11(1) 24-31. 

Modes of origin of allophane have been discussed by Fieldes [1962, 1966]. The latter paper suggests that structural randomness is the principal intrinsic property of allophane. Allophane is frequently produced by weathering of glasses and other disordered aluminosilicates or by processes leading to fast precipitation or very fine subdivision (Fieldes and Furkert [1966]) which are likely to result in random structures. Allophane accumulates in soils where soil conditions favor the persistence of random structures. Effects of this nature on the formation of allophane in rocks and soils are summarized briefly below. 

Prior to 1965, single-pane (single-glazing) windows were standard in U.S. buildings. In cold weather, second panes of glass—storm windows—could be installed for added insulation. 

FIGURE 29 Crusts of weathered glass. The deterioration of glass and the formation... 

Charles also made another important observation, namely that corrosion of an expanded glass structure (i.e., that resulting from a high Active temperature) proceeds faster than corrosion of a compacted glass structure (annealed) even if conditions and glass composition are the same. Thus the weathering characteristics of a piece of glass also depend on its thermal history. 

Cox, G.A., Fleavens, O.S., Newton, R.G. and Pollard, A.M. (1979). A study of the weathering behaviour of Mediaeval glass from York Minster. Journal of Glass Studies 21, 54-75. 

Munier, I., Lefevre, R., Geotti-Bianchini, F. and Verita, M. (2002). Influence of polluted urban atmosphere on the weathering of low durability glasses. Glass Technology 43 225-237. 

The weathering of alt-PRC in a weathering chamber was the subject of a further decomposition study, and the results are very relevant for the use of PPC in outdoor applications [23]. A thin film of PPC on a glass substrate was used and subjected to a temperature of 63°C, humidity of 50%, and light of 250-800 nm with an energy of 550 W/m. It was found that the molecular weight decreased by chain scission... 

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