Jump to content

Samuel D. Gehman

From Wikipedia, the free encyclopedia
Samuel D. Gehman
BornDec. 7, 1903
DiedJun. 1, 1992
NationalityAmerican
Known forGlass transition temperature of rubber
Awards
Scientific career
FieldsPolymer science
InstitutionsGoodyear Tire and Rubber Company

Samuel Dwight Gehman (December 7, 1903 – June 1, 1992) was a Goodyear physicist noted for development of a modulus-based measurement of rubber's glass transition temperature.[1][2]

Personal

[edit]

Gehman was born on December 7, 1903. He died in Akron, Ohio, on June 1, 1992.[3]

Education

[edit]

In 1922, he was one of eight sophomores selected for honors at the University of Pennsylvania.[4] He completed his doctoral dissertation in 1929 on the topic Reflection of Soft X-rays.[5]

Career

[edit]

Gehman was recruited to Goodyear by Ray P. Dinsmore. He made influential studies of strain crystallization via x-rays,[6] of rubber's dynamic properties,[7] and of heat transfer in rubber.[8] 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.[9] He was an inventor of approximately 70 patents.[10]

In 1972, Gehman was listed at 10th out of the 100 top contributors to the world's rubber literature published between 1932 and 1970.[11]

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

Awards and recognitions

[edit]
[edit]

References

[edit]
  1. ^ "ASSOCIATIONS". Chemical & Engineering News Archive. 48 (18). AMERICAN CHEMICAL SOCIETY: 70–72. April 27, 1970. doi:10.1021/cen-v048n018.p070.
  2. ^ Baker, William 0. "SCIENTIFIC SOCIETIES AND PUBLIC PURPOSES". William O. Baker. Retrieved 3 September 2017.{{cite web}}: CS1 maint: numeric names: authors list (link)
  3. ^ "Sam Gehman". myheritage.com. Retrieved 18 August 2017.
  4. ^ "PROCEEDINGS OF UNIVERSITY COUNCIL". University of Pennsylvania. Retrieved 3 September 2017.
  5. ^ Gehman, Samuel Dwight (1929). Reflection of Soft X-rays. University of Pennsylvania. Retrieved 3 September 2017.
  6. ^ Gehman, S. D.; Field, J. E. (1939). "An X‐Ray Investigation of Crystallinity in Rubber". Journal of Applied Physics. 10 (8): 564–572. doi:10.1063/1.1707343.
  7. ^ Gehman, S. D.; Woodford, D. E.; Stambaugh, R. B. (1941). "Dynamic properties of rubber". Industrial & Engineering Chemistry. 33 (8): 1032–1038. doi:10.1021/ie50380a015.
  8. ^ Gehman, S. D. (1967). "Heat transfer in processing and use of rubber". Rubber Chemistry and Technology. 40 (1): 36–99. doi:10.5254/1.3539047.
  9. ^ "Medal winners". Chem. Eng. News. 48 (4): 120–131. 1970. doi:10.1021/cen-v048n004.p120.
  10. ^ "Patents of Samuel Gehman". Google Patents. Retrieved 3 September 2017.
  11. ^ "The Akron Beacon Journal from Akron, Ohio on April 23, 1972 · Page 111". No. 111. Akron Beacon Journal. April 23, 1972. Retrieved 3 September 2017.
  12. ^ "APS Fellow Archive". aps.org. American Physical Society. Retrieved 3 September 2017.
  13. ^ "1970 Charles Goodyear Medal Goes to Samuel D. Gehman". Physics Today. 23 (4): 87. 1970. doi:10.1063/1.3022092.