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Influences of air pollutants on polymeric materials. Natural weathering of polymers

Abstract

Polymeric materials are affected during their entire service life by a number of environmental influences. These originate from both man made and natural sources. Such environmental influences include solar radiation, temperature, humidity and air pollutant effects. They all act together, some independently and some synergistically, to influence material properties, as well as functionality, service life, quality and reliability of the poly materials and systems. The main degradation process is chain scission with loss of molecular weight and oxidation, followed by fading of colours and loss of gloss and mechanical strength. Due to the large number of different types of polymers there are many types of degradation processes and it is difficult to generalise about the effects of the environment on organic materials. Materials, as opposed to organisms, have no self-repair mechanism which allows them to tolerate a certain level of stress. In principle, therefore, it is not possible to define critical levels for the effects of pollutants on materials below which no deterioration occurs. Material deterioration by weathering is normally a very slow process lasting some or more years. Therefore attempts have been made to produce deterioration in short-term experiments by using high stress levels. The limits for the high  More>>
Authors:
Reichert, T F.R. [1] 
  1. Fraunhofer-Institut fuer Chemische Technologie, Pfinztal-Berghausen (Germany)
Publication Date:
Dec 31, 1995
Product Type:
Conference
Report Number:
NEI-FI-290-Vol.3; CONF-9505322-Vol.3
Reference Number:
SCA: 360604; 540120; PA: FI-96:003554; EDB-96:136067; SN: 96001645543
Resource Relation:
Conference: 10. world clean air congress, Espoo (Finland), 28 May - 2 Jun 1995; Other Information: DN: Sponsored by the International Union of Air Pollution Prevention and Environmental Protection Associations (UIAPPA) and hosted by the Finnish Air Pollution Prevention Society (FAPPS); PBD: 1995; Related Information: Is Part Of Proceedings of the 10th world clean air congress. Impacts and management; Kaemaeri, J.; Tolvanen, M.; Anttila, P.; Salonen, R.O. [eds.]; PB: 632 p.
Subject:
36 MATERIALS SCIENCE; 54 ENVIRONMENTAL SCIENCES; WEATHERING; AIR POLLUTION; POLYMERS; ENVIRONMENTAL EXPOSURE
OSTI ID:
283459
Research Organizations:
Finnish Air Pollution Prevention Society, Helsinki (Finland)
Country of Origin:
Finland
Language:
English
Other Identifying Numbers:
Other: ON: DE96777170; ISBN 952-90-6474-8; TRN: FI9603554
Availability:
OSTI as DE96777170
Submitting Site:
FI
Size:
pp. [8]
Announcement Date:
Sep 20, 1996

Citation Formats

Reichert, T F.R. Influences of air pollutants on polymeric materials. Natural weathering of polymers. Finland: N. p., 1995. Web.
Reichert, T F.R. Influences of air pollutants on polymeric materials. Natural weathering of polymers. Finland.
Reichert, T F.R. 1995. "Influences of air pollutants on polymeric materials. Natural weathering of polymers." Finland.
@misc{etde_283459,
title = {Influences of air pollutants on polymeric materials. Natural weathering of polymers}
author = {Reichert, T F.R.}
abstractNote = {Polymeric materials are affected during their entire service life by a number of environmental influences. These originate from both man made and natural sources. Such environmental influences include solar radiation, temperature, humidity and air pollutant effects. They all act together, some independently and some synergistically, to influence material properties, as well as functionality, service life, quality and reliability of the poly materials and systems. The main degradation process is chain scission with loss of molecular weight and oxidation, followed by fading of colours and loss of gloss and mechanical strength. Due to the large number of different types of polymers there are many types of degradation processes and it is difficult to generalise about the effects of the environment on organic materials. Materials, as opposed to organisms, have no self-repair mechanism which allows them to tolerate a certain level of stress. In principle, therefore, it is not possible to define critical levels for the effects of pollutants on materials below which no deterioration occurs. Material deterioration by weathering is normally a very slow process lasting some or more years. Therefore attempts have been made to produce deterioration in short-term experiments by using high stress levels. The limits for the high stress levels are given by the comparability of the obtained damage from artificially accelerated weathering with these from real natural weathering. To investigate the damage caused by air pollutants on polymeric materials, samples were natural weathered with some light exposed and some dark stored samples in different climatic and polluted areas of Germany. The weathering stations are closed to the continuously measuring stations for air quality}
place = {Finland}
year = {1995}
month = {Dec}
}