Structure and structure formation of a main chain thermotropic polymer
Random copolymers containing 58% 4-hydroxybenzoic acid and 42% 2-hydroxy-6-naphthoic acid are able to display a three dimensional order with a degree of crystallinity of more than 60%. The crystals are far from being perfect: their enthalpy and entropy of transition are 10–20 times smaller than expe...
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| Veröffentlicht in: | Polymer (Guilford) 1986-09, Vol.27 (9), p.1337-1344 |
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| container_title | Polymer (Guilford) |
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| creator | Butzbach, G.D. Wendorff, J.H. Zimmermann, H.J. |
| description | Random copolymers containing 58% 4-hydroxybenzoic acid and 42% 2-hydroxy-6-naphthoic acid are able to display a three dimensional order with a degree of crystallinity of more than 60%. The crystals are far from being perfect: their enthalpy and entropy of transition are 10–20 times smaller than expected for a perfect crystalline state and the volume change on transition is negligible. The crystallization occurs in two steps: the first, which is completed within seconds, leads to a degree of crystallinity of ∼ 30%. The second, very slow, step, which corresponds apparently to postcrystallization, occurs over more than 10
7 s of annealing time and causes the degree of crystallinity to exceed 60%. |
| doi_str_mv | 10.1016/0032-3861(86)90031-5 |
| format | Article |
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| ispartof | Polymer (Guilford), 1986-09, Vol.27 (9), p.1337-1344 |
| issn | 0032-3861 1873-2291 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_24291521 |
| source | ScienceDirect Journals (5 years ago - present) |
| subjects | Applied sciences crystal structure crystallization Exact sciences and technology Organic polymers Physicochemistry of polymers postcrystallization Properties and characterization rigid rod-like polymer Structure, morphology and analysis thermodynamic properties thermotropic properties |
| title | Structure and structure formation of a main chain thermotropic polymer |
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