sentence: Chemists dissolve celluloid in ether or acetone to make collodion.
sentences_before: Polymer chemistry started by studying the long fibers in plants. Nitrocellulose treated with camphor makes celluloid.
sentences_after: Doctors have used collodion as a wound dressing since the U.S. Civil War. Cellulose acetate was first prepared in 1865. In 1844 Charles Goodyear received a U.S. patent for vulcanizing rubber with sulfur and heat. Thomas Hancock had received a patent for the same process in the UK the year before.
concept_name: chemist
headings: Polymer chemistry History
categories: Polymer chemistry