Products of Chemistry - Happy and Unhappy Balls: Neoprene and Polynorbornene
Polymer Science and Engineering
A new scientific novelty that can be used to demonstrate a number of scientific principles, either in lecture demonstration or laboratory experiments, is a pair of solid, black, identically appearing spheres.
Journal of Chemical Education
Kauffman, G. B.,
Mason, S. W.,
Seymour, R. B.
(1990). Products of Chemistry - Happy and Unhappy Balls: Neoprene and Polynorbornene. Journal of Chemical Education, 67(3), 198-199.
Available at: https://aquila.usm.edu/fac_pubs/7347