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Title: Polymer glazing for silver mirrors

Abstract

This paper reports on an evaluation and modification of polymeric glazings to protect silver mirrors. The mirrors were made using Corning 7809 glass as a substrate onto which a thin silver film is deposited. The modified polymeric films are then cast from solution onto the silver. The mirrors were characterized by measuring the hemispherical reflectance and the specular reflectance at 660 nm and selected acceptance angles (7.5 mrad or 3.5 mrad). The mirrors were exposed to environmental degradation using accelerated weathering devices and outdoor exposure. Empirical evidence has demonstrated that polymethylmethacrylate is a stable polymer in a terrestrial environment, but the polymer does not provide adequate protection for the silver reflector. The crucial role in degradation played by ultraviolet (uv) light is shown by several experimental results. It has been demonstrated that uv stabilizers added to the polymer improve the weatherability of mirrors. The relative effectiveness of different stabilizers will be discussed in terms of the weathering modes, retention of optical properties, and effectiveness of the additives. The process for silver deposition influences the reflectance of silver mirrors, and the optical properties depend on subtle relationships between the metallization and the dielectric (polymeric) films that are in contact with themore » silver.« less

Authors:
;
Publication Date:
Research Org.:
Solar Energy Research Inst., Golden, CO (USA)
OSTI Identifier:
5573649
Report Number(s):
SERI/TP-255-2724; CONF-850887-3
ON: DE85012140
DOE Contract Number:  
AC02-83CH10093
Resource Type:
Conference
Resource Relation:
Conference: SPIE international technical symposium on optical and electro-optical engineers, San Diego, CA, USA, 18 Aug 1985
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; POLYMERS; SPECTRAL REFLECTANCE; SOLAR REFLECTORS; SURFACE COATING; EXPERIMENTAL DATA; GLAZING MATERIALS; MIRRORS; PMMA; SILVER; STABILITY; THERMAL DEGRADATION; ULTRAVIOLET RADIATION; WEATHERING; DATA; DEPOSITION; ELECTROMAGNETIC RADIATION; ELEMENTS; EQUIPMENT; ESTERS; INFORMATION; MATERIALS; METALS; NUMERICAL DATA; OPTICAL PROPERTIES; ORGANIC COMPOUNDS; ORGANIC POLYMERS; PHYSICAL PROPERTIES; POLYACRYLATES; POLYVINYLS; RADIATIONS; SOLAR CONCENTRATORS; SOLAR EQUIPMENT; TRANSITION ELEMENTS; POLYMER GLAZING; SILVER MIRRORS; UV STABILIZERS; SILVER DEPOSITION; REFLECTANCE; 141000* - Solar Collectors & Concentrators

Citation Formats

Neidlinger, H H, and Schissel, P. Polymer glazing for silver mirrors. United States: N. p., 1985. Web.
Neidlinger, H H, & Schissel, P. Polymer glazing for silver mirrors. United States.
Neidlinger, H H, and Schissel, P. 1985. "Polymer glazing for silver mirrors". United States. https://www.osti.gov/servlets/purl/5573649.
@article{osti_5573649,
title = {Polymer glazing for silver mirrors},
author = {Neidlinger, H H and Schissel, P},
abstractNote = {This paper reports on an evaluation and modification of polymeric glazings to protect silver mirrors. The mirrors were made using Corning 7809 glass as a substrate onto which a thin silver film is deposited. The modified polymeric films are then cast from solution onto the silver. The mirrors were characterized by measuring the hemispherical reflectance and the specular reflectance at 660 nm and selected acceptance angles (7.5 mrad or 3.5 mrad). The mirrors were exposed to environmental degradation using accelerated weathering devices and outdoor exposure. Empirical evidence has demonstrated that polymethylmethacrylate is a stable polymer in a terrestrial environment, but the polymer does not provide adequate protection for the silver reflector. The crucial role in degradation played by ultraviolet (uv) light is shown by several experimental results. It has been demonstrated that uv stabilizers added to the polymer improve the weatherability of mirrors. The relative effectiveness of different stabilizers will be discussed in terms of the weathering modes, retention of optical properties, and effectiveness of the additives. The process for silver deposition influences the reflectance of silver mirrors, and the optical properties depend on subtle relationships between the metallization and the dielectric (polymeric) films that are in contact with the silver.},
doi = {},
url = {https://www.osti.gov/biblio/5573649}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jul 01 00:00:00 EDT 1985},
month = {Mon Jul 01 00:00:00 EDT 1985}
}

Conference:
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