Local free volume and glass transition in propylene/alpha- olefin copolymers with a defined length and number of branches

G. Dlubek; D. Bamford; A. Rodriguez-Gonzalez; K. Petters; C. Hübner; S. Bornemann; T. Lupke; O. Henschke; J. Stejny; M. A. Alam; M. Arnold

Local free volume and glass transition in propylene/alpha- olefin copolymers with a defined length and number of branches

G. Dlubek, D. Bamford, A. Rodriguez-Gonzalez, K. Petters, C. Hübner, S. Bornemann, T. Lupke, O. Henschke, J. Stejny, M. A. Alam, M. Arnold

Institut für Physik

Abstract

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.

Originalsprache	Englisch
Titel	Positron Annihilation - Icpa-12
Seitenumfang	3
Band	363-365
Erscheinungsdatum	01.08.2001
Seiten	303-305
Publikationsstatus	Veröffentlicht - 01.08.2001
Veranstaltung	12th International Conference on Positron Annihilation - Munchen, Deutschland Dauer: 06.08.2000 → 12.08.2000

UN SDGs

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Andere Dateien und Links

https://www.scopus.com/record/display.uri?eid=2-s2.0-0342526902&origin=inward&txGid=822d9f8593dc5f5fde622945c13be87f

Zitieren

Dlubek, G., Bamford, D., Rodriguez-Gonzalez, A., Petters, K., Hübner, C., Bornemann, S., Lupke, T., Henschke, O., Stejny, J., Alam, M. A., & Arnold, M. (2001). Local free volume and glass transition in propylene/alpha- olefin copolymers with a defined length and number of branches. in Positron Annihilation - Icpa-12 (Band 363-365, S. 303-305). (Materials Science Forum).

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title = "Local free volume and glass transition in propylene/alpha- olefin copolymers with a defined length and number of branches",

abstract = "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.",

author = "G. Dlubek and D. Bamford and A. Rodriguez-Gonzalez and K. Petters and C. H{\"u}bner and S. Bornemann and T. Lupke and O. Henschke and J. Stejny and Alam, {M. A.} and M. Arnold",

year = "2001",

month = aug,

day = "1",

language = "English",

volume = "363-365",

series = "Materials Science Forum",

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Dlubek, G, Bamford, D, Rodriguez-Gonzalez, A, Petters, K, Hübner, C, Bornemann, S, Lupke, T, Henschke, O, Stejny, J, Alam, MA & Arnold, M 2001, Local free volume and glass transition in propylene/alpha- olefin copolymers with a defined length and number of branches. in Positron Annihilation - Icpa-12. Bd. 363-365, Materials Science Forum, S. 303-305, 12th International Conference on Positron Annihilation, Munchen, Bayern, Deutschland, 06.08.00.

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 -