New solutions to the problems of chain orientation and chain continuity in structure analysis of fibrous polymers. A reconsideration of the structure of polyisobutene

Immirzi, A.; Alfano, D.; Tedesco, C.

doi:10.1107/S0021889806044955

Journal of Applied Crystallography Journal of Applied
Crystallography

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Figure 2
Chain model for polyisobutene. The 16-atom asymmetric unit is represented, delineated with 1′ (1 repeated forward) and 8′′ (8 repeated backward). H atoms are omitted. Chain C-C bond lengths are b₁ and side C-C lengths are b₂. C-H bond lengths are b₃. $[\tau_4]$ , $[\tau_5]$ and $[\tau_6]$ are bond angles of CH₂, CMe₂ and Me-C-Me, respectively. The torsion angles $[\vartheta_7]$ – $[\vartheta_{14}]$ are indicated.

JOURNAL OF
APPLIED
CRYSTALLOGRAPHY

ISSN: 1600-5767

Volume 40| Part 1| January 2007| Pages 10-15

doi:10.1107/S0021889806044955

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