Samuel D. Gehman

Gehman was born on December 7, 1903. He died in Akron, Ohio, on June 1, 1992.{{cite web|title=Sam Gehman|url=https://www.myheritage.com/research/record-10002-39572583/samuel-d-gehman-in-us-social-security-death-index-ssdi|website=myheritage.com|accessdate=18 August 2017}}

In 1922, he was one of eight sophomores selected for honors at the University of Pennsylvania.{{cite web|title=PROCEEDINGS OF UNIVERSITY COUNCIL|url=https://archive.org/stream/proceedingsofuni00penn/proceedingsofuni00penn_djvu.txt|publisher=University of Pennsylvania|accessdate=3 September 2017}} He completed his doctoral dissertation in 1929 on the topic Reflection of Soft X-rays.{{cite book|last1=Gehman|first1=Samuel Dwight|title=Reflection of Soft X-rays|date=1929|publisher=University of Pennsylvania|url=https://books.google.com/books?id=PFQNAQAAMAAJ|accessdate=3 September 2017}}

Gehman was recruited to Goodyear by Ray P. Dinsmore. He made influential studies of strain crystallization via x-rays,{{cite journal |last1=Gehman, S. D. |last2=Field, J. E. |title=An X‐Ray Investigation of Crystallinity in Rubber |journal=Journal of Applied Physics |date=1939 |volume=10 |issue=8 |pages=564-572 |doi=10.1063/1.1707343}} of rubber's dynamic properties,{{cite journal |last1=Gehman |first1=S. D. |last2=Woodford |first2=D. E. |last3=Stambaugh |first3=R. B. |title=Dynamic properties of rubber |journal=Industrial & Engineering Chemistry |date=1941 |volume=33 |issue=8 |pages=1032-1038 |doi=10.1021/ie50380a015}} and of heat transfer in rubber.{{cite journal |last1=Gehman |first1=S. D. |title=Heat transfer in processing and use of rubber |journal=Rubber Chemistry and Technology |date=1967 |volume=40 |issue=1 |pages=36-99 |doi=10.5254/1.3539047}} He managed physics research at Goodyear's research division and was renowned for developing the Gehman low-temperature twist test, which gave laboratories convenient and precise low-temperature stiffening measurements of rubber compounds.{{cite journal|title=Medal winners|journal=Chem. Eng. News|date=1970|volume=48|issue=4|pages=120–131|doi=10.1021/cen-v048n004.p120|doi-access=free}} He was an inventor of approximately 70 patents.{{cite web|title=Patents of Samuel Gehman|url=https://www.google.it/search?dcr=0&tbm=pts&q=samuel+d.+gehman&oq=samuel+d.+gehman&gs_l=psy-ab.3...2947.5754.0.6319.12.9.3.0.0.0.69.487.9.9.0....0...1.1.64.psy-ab..0.5.156...0j0i30k1.eStXxZGI1BA|website=Google Patents|accessdate=3 September 2017}}

In 1972, Gehman was listed at 10th out of the 100 top contributors to the world's rubber literature published between 1932 and 1970.{{cite news|url=https://www.newspapers.com/newspage/152268209/|accessdate=3 September 2017|issue=111|publisher=Akron Beacon Journal|date=April 23, 1972|title=The Akron Beacon Journal from Akron, Ohio on April 23, 1972 · Page 111 }}

Gehman retired in 1968 following 40 years with Goodyear Tire & Rubber Co.

• 1965 - Fellow of the American Physical Society{{cite web|title=APS Fellow Archive|url=http://www.aps.org/programs/honors/fellowships/archive-all.cfm?institution=University%20of%20Akron&nom_unit=&year=|website=aps.org|publisher=American Physical Society|accessdate=3 September 2017}}
• 1970 - Charles Goodyear Medal from the ACS Rubber Division{{cite journal|title=1970 Charles Goodyear Medal Goes to Samuel D. Gehman|journal=Physics Today|date=1970|volume=23|issue=4|page=87|doi=10.1063/1.3022092}}

• [http://www.summitmemory.org/cdm/singleitem/collection/rubber/id/85 Audio interview] with Samuel D. Gehman

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Category:Polymer scientists and engineers

Category:1903 births

Category:1992 deaths

Category:Tire industry people

Category:Goodyear Tire and Rubber Company people

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