weathering properties of plastics

Weathering of Plastics - ThomasNetThe effects of weathering such as yellowing as well as changes that occur in mechanical properties due to photodegradation are listed. The weathering behavior of a plastic is one of the most important limiting factors in assessing and selecting a plastic for outdoor applications. The document focuses on the process of weathering of plastics with particular emphasis on the causes and effects of UV degradation. Establishing weathering behavior as the basis for selection of plastic ...

UV Properties of Plastics - VitaminDWikiHowever, none of the standards give a required standard for the properties of the product at the end of the exposure period. Several major users derive their own criteria. An example is the weathering of Plastic Pipes. (Report TR18/99) by the Plastic Pipe Institute, which warns of the large differences in environment for different locations in the USA. Another is for plastic lumber where the hardness of the outer skin must not have changed by more than 10% after 500 hours of exposure.

Weathering Properties - Handbook of Plastics Testing and Failure ...14 Jun 2006 ... Introduction. Accelerated weathering Tests. Outdoor weathering of plastics (ASTM D 1435, ISO-877). Resistance of Plastic Materials to Fungi (ASTM G 21). Resistance of Plastic Materials to Bacteria (ASTM G 22). Limitations of Accelerated Microbial Growth Resistance Testing. Outdoor Exposure Test for Studying the Resistance of Plastic Materials to Fungi and Bacteria and its Limitations. References. Suggested Reading. Get PDF : This Chapter (10699K)All Chapters ...

Plastic materials and durability: weathering testing - AIMPLAS22 Jul 2016 ... Given its nature, during weathering testing and ageing test, the movement of molecular chains or their breaking up affects the properties of plastics, almost always to make them worse. Let's see how some weathering agents affect: Cool: low temperatures, below material's glass transition temperature, immobilize chains, so the material becoming fragile. This is because chains cannot loose shape to absorb forces. Dry heat: high temperatures cause molecules' mobility, ...

Good Weathering - Curbell PlasticsUV stable plastics e.g. Acrylic, PVDF - with good weathering resistance for outdoor use and applications. Learn more at Curbell plastics.

Polymer materials | Testing of weathering resistance - KiwaPolymer materials, testing of weathering resistance. Kiwa Expert Centre Polymers is involved in testing the weathering resistance of polymer materials and products. plastics are often used outdoors or in indoor locations where they are exposed to daylight or to daylight behind glass for long periods. The effects of daylight, heat, moisture and other climatic stresses may have influence on the aesthetic and mechanical properties of plastics and for that reason the resistance to this effects ...

Plastics for Outdoor Applications | Curbell PlasticsAlso plastic material for outdoor glazing applications, outdoor signs and wood replacement. ... Acrylic and polycarbonate sheet materials are widely used for signs because they come in a wide variety of colors, have outstanding aesthetic properties in reflected light (daylight) and transmitted light (for back-lit signs), and they are easy to form into complex shapes including letters and company logos. ... How will outdoor weathering affect the properties of a transparent plastic material?

Weathering Resistance - Dietzel UnivoltThe degradation of plastics is caused by various factors com- monly referred to as weathering. Typically, polymers suffer from colour changes when exposed to UV light over extended peri- ods. Additionally, mechanical properties may change leading to reduced tensile strength and impact resistance, embrittlement, tension cracks and chalking. The most important factors leading to degradation either indivi- dually or in combination are: Solar radiation. Long term exposure to sunlight, ...

Plastic Weathering Fundamentals - SlideShare23 Apr 2014 ... Most other polymers (including polyolefns and some engineering plastics) fall into the middle range of this spectrum, and can be used successfully outdoors when properly stabilized. The inherent weathering characteristics of a polymer are an important consideration in material selection as part of the product design process. For example, the properties and processing characteristics of ABS and ASA are similar, but for outdoor applications ASA is preferred due to its ...

Assessing the weatherability of plastics compounds - Q-LabIt is also vital to be aware of how the customer defines quality for example, is it colour, gloss and/or the retention of physical properties? Added to this complexity are various methods of accelerated testing, including outdoor testing and laboratory testing in a fluorescent-UV or xenon-arc test chamber, which are used to predict how a material will perform under long-term weathering. Suppliers of equipment and materials agree that accelerated laboratory weathering tests are excellent ...

Weather testing of polymers - WikipediaPolymers are used in everyday life, so it is important for scientists and polymer producers to understand durability and expected lifespan of polymer products. Paint, a common polymer coating, is used to change the colour, change the reflectance (gloss), as well as forming a protective coating. The structure of paint consists of pigments in a matrix of resin. A typical example is painted steel roofing and walling products, which are constantly exposed to harmful weathering conditions.

Cause and effect in the weathering of plastics - Wiley Online Libraryeffect in the weathering of plastics. Thus, it starts with a summary of the factors in the weather which are usually responsible for polymer degradation. This is followed by an outline of the critical modes of in- teraction between the weather and plastics and some detectable effects of these interactions on the properties of the material. Finally, we present some recently proposed techniques for predicting the weathering characteristics of plastics. Weatherability is defined here as the net ...

Accelerated Weathering Testing for Plastics and Polymers - IntertekIntertek provides accelerated weathering testing of polymer and plastic materials and products through a plethora of different tests. Our experts test the resistance of polymeric products against environmental impact, weathering, temperature, humidity, repeated sterilization or UV/ Xenon exposure. The polymer materials or products will be exposed under defined conditions to heat, UV, and other stress to determine its critical properties before and after exposure. Materials typically ...

Factors of polymer weathering - WikipediaThe aging of natural and artificial polymeric materials is a natural phenomenon in metals, glass, minerals and other inorganic materials. The main environmental parameters influencing the degradation of polymeric materials is daylight combined with the effects of temperature, moisture and oxygen. These act as the main parameters of stress for outdoor weathering.

Weathering of Plastics - ScienceDirectThe online version of weathering of plastics by George Wypych on ScienceDirect.com, the world's leading platform for high quality peer-reviewed full-text books.

Product Details

Product List