Harry R. Allcock (born 8 April 1932, Loughborough, England)^[1] is Evan Pugh Professor of chemistry at Pennsylvania State University in the United States.^[2]

Allcock obtained his B.Sc. in 1953 and his Ph.D. in 1956, both at the University of London. He is notable for his work on the "inorganic rubbers" with a phosphorus-nitrogen backbone (polyphosphazenes). With James E. Mark and Robert West, Allcock co-authored the book Inorganic Polymers (Oxford University Press, 2005). He also wrote Introduction to Materials Chemistry (John Wiley & Sons, 2008), Phosphorus-Nitrogen Compounds Cyclic, Linear, and High Polymeric Systems (Academic Press, 1972), Chemistry and Applications of Polyphosphazenes (Wiley-Interscience, 2002, and co-authored Contemporary Polymer Chemistry (Prentice Hall, 2003) with Fred Lampe and James Mark.

Allcock was elected as a member into the National Academy of Engineering in 2014 for the development of polyphosphazenes, a new class of biomaterials.

Awards and honors

• American Chemical Society National Award in Polymer Chemistry (1984)
• Guggenheim Fellow (1986/1987)
• American Institute of Chemists Chemical Pioneer Award (1989)
• American Chemical Society National Award in Materials Chemistry (1992)
• A.C.S. Herman Mark Award in Polymer Chemistry (1994)
• Penn State Graduate Commencement Speaker (1997 & 2005)
• Honorary degree from Loughborough University, U.K. (2006)
• American Chemical Society National Award in Applied Polymer Science (2007)
• National Academy of Engineering member (2014)