TY - CHAP
T1 - Local free volume and glass transition in propylene/alpha- olefin copolymers with a defined length and number of branches
AU - Dlubek, G.
AU - Bamford, D.
AU - Rodriguez-Gonzalez, A.
AU - Petters, K.
AU - Hübner, C.
AU - Bornemann, S.
AU - Lupke, T.
AU - Henschke, O.
AU - Stejny, J.
AU - Alam, M. A.
AU - Arnold, M.
PY - 2001/8/1
Y1 - 2001/8/1
N2 - The local free volume size v, the glass transition temperature Tg and the specific volume have been estimated for propylenes branched with a defined amount (0 to 20 mole-%) of various α-olefins (C4 to C16). From the specific volume the fractional free volume was calculated and from this the number density of holes has been estimated. It is observed that Tg decreases and the hole size v increases linearly with both the number and length of branches. From this a linear relation between Tg and v follows. For polyethylene, an increasing number and size of holes with increasing degree of branching was observed.
AB - The local free volume size v, the glass transition temperature Tg and the specific volume have been estimated for propylenes branched with a defined amount (0 to 20 mole-%) of various α-olefins (C4 to C16). From the specific volume the fractional free volume was calculated and from this the number density of holes has been estimated. It is observed that Tg decreases and the hole size v increases linearly with both the number and length of branches. From this a linear relation between Tg and v follows. For polyethylene, an increasing number and size of holes with increasing degree of branching was observed.
UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-0342526902&origin=inward&txGid=822d9f8593dc5f5fde622945c13be87f
M3 - Chapter
VL - 363-365
T3 - Materials Science Forum
SP - 303
EP - 305
BT - Positron Annihilation - Icpa-12
T2 - 12th International Conference on Positron Annihilation
Y2 - 6 August 2000 through 12 August 2000
ER -
