Difference between revisions of "Polyolefin"
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* Not susceptible to hydrolysis. | * Not susceptible to hydrolysis. | ||
* Oxidative degradation is accelerated by UV and heat. | * Oxidative degradation is accelerated by UV and heat. | ||
| − | * Films can be | + | * Films can be severely degraded by one year of outdoor exposure. |
== Resources and Citations == | == Resources and Citations == | ||
Revision as of 14:48, 4 July 2020
Description
A general name for polymers or copolymers made from olefin hydrocarbons. Common polyolefins are Polyethylene and Polypropylene. Isobutylene was the first olefin to be polymerized in 1873, but it was not made into a commercial product until I.G.Farbenindustrie of Germany developed it as a rubber substitute in the 1930s. Ethylene was first polymerized by ICI in England in the 1930s and it became an important plastic during W.W.II for fibers. Large scale applications for polyolefins were developed in the 1960s,when olefins were recognized as inexpensive raw materials. Currently, polyeolfins, polyethylenes, and polypropylenes, etc, are the most common produced polymers.
Synonyms and Related Terms
polietileno (Esp.); poliolefina (Esp.); polyoléfine (Fr.); poliolefina (It.); poliolefina (Port.)
Examples include: polyethylene; polypropylene, polyisobutylene;
Applications
- Transparent sheets, films
- Foams
- Solid boards, Corrugated board
- Formed materials, pellets
- Non-woven fabics (Tyvek) fluff
Risks
- Not susceptible to hydrolysis.
- Oxidative degradation is accelerated by UV and heat.
- Films can be severely degraded by one year of outdoor exposure.
Resources and Citations
- Scott R. Williams. Plastic Storage Products. In ‘Preventive Conservation: Collection Storage’ Lisa Elkin and Christopher A. Norris (eds.), Society for the Preservation of Natural History Collections, New York. 2019. 774.
- Williams, S. R. (2002) “Polyolefin Foams,” AIC News, Volume 27, Number 1.
- Contribution: Gina Watkinson, AIC Plastics Panel, 2020.
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: P. 636
- Hoechst Celanese Corporation, Dictionary of Fiber & Textile Technology (older version called Man-made Fiber and Textile Dictionary, 1965), Hoechst Celanese Corporation, Charlotte NC, 1990
- J.Gordon Cook, Handbook of Textile Fibres:II Man-made Fibres, Merrow Publishing Co. , Durham, England Comment: p. 536
- Theodore J. Reinhart, 'Glossary of Terms', Engineered Plastics, ASM International, 1988