Positron annihilation lifetime spectral changes on dehydration of natural beryls and cordierites

Positron annihilation lifetime studies o

Positron annihilation lifetime studies of changes in free volume on cross-linking cis-polyisoprene, high-vinyl polybutadiene, and their miscible blends

✍ R. Srithawatpong; Z. L. Peng; B. G. Olson; A. M. Jamieson; R. Simha; J. D. McGer 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 304 KB 👁 2 views

Measurements of average free volume hole sizes, ͗v f ͘, and the fractional free volumes, f ps , in vulcanized cis-polyisoprene (CPI), high-vinyl polybutadiene (HVBD), and their 50 : 50 blend were made via determination of orthopositronium annihilation lifetimes. The results are compared to correspon