Isotactic polypropylene (iPP), the number-two commercial polymer, was known for decades to adopt three crystalline forms, α, β, and γ, and in the past decade a fourth form, δ, was identified. Now, a ...
F. J. Padden and H. D. Keith, J. Appl. Phys., 30, 1479 (1959). D. R. Norton and A. Keller, Polymer, 26, 704 (1985). F. L. Binsbergen and B. G. M. De Lange, Polymer, 9 ...
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