Definition
Alexander Parkes (13 January 1813 – 30 March 1890) was an English metallurgist, inventor, and industrialist, best known for developing Parkesine, the first commercially successful thermoplastic, and for inventing the Parkes process for zinc extraction.
Overview
Born in Birmingham, England, Parkes was educated in engineering and chemistry and began his career working in iron foundries. In the 1840s he established his own iron and steel works, where he conducted a series of experiments on the properties of cellulose and other organic compounds. His most notable achievement, the creation of Parkesine, was exhibited at the Great Exhibition of 1851 in London, where it attracted considerable attention as a novel, moldable material. Although Parkesine’s commercial success was limited due to durability issues, it laid the groundwork for later thermoplastics such as celluloid.
Beyond plastics, Parkes contributed to metallurgical processes. He patented the Parkes process in 1850, a method for extracting metallic zinc from its ore using iron as a reducing agent, which became widely adopted in the zinc industry. Throughout his life Parkes held more than 30 patents covering a range of inventions, including improvements in steam engines, paper-making, and electrical devices. He was a member of several scientific societies, including the Royal Society of Arts.
Etymology/Origin
The given name “Alexander” derives from the Greek name Alexandros, meaning “defender of men.” The surname “Parkes” is of English origin, typically a locational name referring to someone who lived near or worked in a park or an enclosed area of land.
Characteristics
- Inventive Output: Parkes secured over 30 patents between 1844 and 1886, covering diverse fields such as materials science, metallurgy, and mechanical engineering.
- Parkesine: Produced by treating cellulose with camphor and other solvents, Parkesine could be softened by heat and molded into various shapes, marking the first practical use of a thermoplastic material.
- Metallurgical Innovation: The Parkes process improved the efficiency of zinc production by precipitating zinc from solution using iron, a technique that remains foundational in modern zinc refining.
- Industrial Influence: His iron and steel works in Birmingham contributed to the region’s industrial expansion during the mid‑19th century.
- Recognition: Parkes received several medals and honors for his inventions, including a bronze medal at the Great Exhibition for Parkesine.
Related Topics
- Celluloid – The first widely produced thermoplastic, developed by John Wesley Hyatt and derived from Parkesine’s principles.
- Thermoplastics – A class of polymers that become pliable when heated and solidify upon cooling, a category inaugurated by Parkesine.
- Zinc Extraction – Metallurgical processes for obtaining zinc, notably the Parkes process.
- Great Exhibition of 1851 – International exposition in London where Parkesine was prominently displayed.
- Industrial Revolution (United Kingdom) – The broader historical context of Parkes’s work in manufacturing and materials development.