Dynamic x-ray diffraction studies of liquid-crystalline polyesters
| ISSN: |
0887-6266
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|---|---|
| Keywords: |
Chemistry ; Polymer and Materials Science
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| Source: |
Wiley InterScience Backfile Collection 1832-2000
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| Topics: |
Chemistry and Pharmacology
Physics
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| Notes: |
Mesophase transitions in liquid-crystalline (LC) polyesters were studied by dynamic x-ray diffraction using a synchrotron radiation source. Powder and fiber samples were examined by continuous heating from 50°C to 270°C in a hot stage. The polymer systems consisted of two types of thermotropic polyesters with mesogenic cores composed of combinations of substituted terephthalate, oxybenzoate and hydroquinone units combined with aliphatic spacers placed in the main chain. One of these samples was a chemically homogeneous LC polyester (HTH12) while the other LC polyester possessed chemical heterogeneity (BP6). BP6 could also be processed to form fibers which showed thermal transition behavior by x-ray diffraction and no detectable melting or clearing transition by thermal measurements. LC textures were observed using polarized light microscopy. Results of the dynamic x-ray diffraction studies of these two LC polymers are described.
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| Additional Material: |
11 Ill.
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| Type of Medium: |
Electronic Resource
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| URL: |
| _version_ | 1798297843335692288 |
|---|---|
| addmaterial | 11 Ill. |
| autor | Ober, C. K. Delvin, A. Bluhm, T. L. |
| autorsonst | Ober, C. K. Delvin, A. Bluhm, T. L. |
| book_url | http://dx.doi.org/10.1002/polb.1990.090280705 |
| datenlieferant | nat_lic_papers |
| hauptsatz | hsatz_simple |
| identnr | NLM163951837 |
| iqvoc_descriptor_keyword | iqvoc_00000092:Materials |
| issn | 0887-6266 |
| journal_name | Journal of Polymer Science Part B: Polymer Physics |
| materialart | 1 |
| notes | Mesophase transitions in liquid-crystalline (LC) polyesters were studied by dynamic x-ray diffraction using a synchrotron radiation source. Powder and fiber samples were examined by continuous heating from 50°C to 270°C in a hot stage. The polymer systems consisted of two types of thermotropic polyesters with mesogenic cores composed of combinations of substituted terephthalate, oxybenzoate and hydroquinone units combined with aliphatic spacers placed in the main chain. One of these samples was a chemically homogeneous LC polyester (HTH12) while the other LC polyester possessed chemical heterogeneity (BP6). BP6 could also be processed to form fibers which showed thermal transition behavior by x-ray diffraction and no detectable melting or clearing transition by thermal measurements. LC textures were observed using polarized light microscopy. Results of the dynamic x-ray diffraction studies of these two LC polymers are described. |
| package_name | Wiley-Blackwell |
| publikationsjahr_anzeige | 1990 |
| publikationsjahr_facette | 1990 |
| publikationsjahr_intervall | 8009:1990-1994 |
| publikationsjahr_sort | 1990 |
| publikationsort | Bognor Regis [u.a.] |
| publisher | Wiley-Blackwell |
| reference | 28 (1990), S. 1047-1062 |
| schlagwort | Chemistry Polymer and Materials Science |
| search_space | articles |
| shingle_author_1 | Ober, C. K. Delvin, A. Bluhm, T. L. |
| shingle_author_2 | Ober, C. K. Delvin, A. Bluhm, T. L. |
| shingle_author_3 | Ober, C. K. Delvin, A. Bluhm, T. L. |
| shingle_author_4 | Ober, C. K. Delvin, A. Bluhm, T. L. |
| shingle_catch_all_1 | Ober, C. K. Delvin, A. Bluhm, T. L. Dynamic x-ray diffraction studies of liquid-crystalline polyesters Chemistry Polymer and Materials Science Chemistry Polymer and Materials Science Mesophase transitions in liquid-crystalline (LC) polyesters were studied by dynamic x-ray diffraction using a synchrotron radiation source. Powder and fiber samples were examined by continuous heating from 50°C to 270°C in a hot stage. The polymer systems consisted of two types of thermotropic polyesters with mesogenic cores composed of combinations of substituted terephthalate, oxybenzoate and hydroquinone units combined with aliphatic spacers placed in the main chain. One of these samples was a chemically homogeneous LC polyester (HTH12) while the other LC polyester possessed chemical heterogeneity (BP6). BP6 could also be processed to form fibers which showed thermal transition behavior by x-ray diffraction and no detectable melting or clearing transition by thermal measurements. LC textures were observed using polarized light microscopy. Results of the dynamic x-ray diffraction studies of these two LC polymers are described. 0887-6266 08876266 Wiley-Blackwell |
| shingle_catch_all_2 | Ober, C. K. Delvin, A. Bluhm, T. L. Dynamic x-ray diffraction studies of liquid-crystalline polyesters Chemistry Polymer and Materials Science Chemistry Polymer and Materials Science Mesophase transitions in liquid-crystalline (LC) polyesters were studied by dynamic x-ray diffraction using a synchrotron radiation source. Powder and fiber samples were examined by continuous heating from 50°C to 270°C in a hot stage. The polymer systems consisted of two types of thermotropic polyesters with mesogenic cores composed of combinations of substituted terephthalate, oxybenzoate and hydroquinone units combined with aliphatic spacers placed in the main chain. One of these samples was a chemically homogeneous LC polyester (HTH12) while the other LC polyester possessed chemical heterogeneity (BP6). BP6 could also be processed to form fibers which showed thermal transition behavior by x-ray diffraction and no detectable melting or clearing transition by thermal measurements. LC textures were observed using polarized light microscopy. Results of the dynamic x-ray diffraction studies of these two LC polymers are described. 0887-6266 08876266 Wiley-Blackwell |
| shingle_catch_all_3 | Ober, C. K. Delvin, A. Bluhm, T. L. Dynamic x-ray diffraction studies of liquid-crystalline polyesters Chemistry Polymer and Materials Science Chemistry Polymer and Materials Science Mesophase transitions in liquid-crystalline (LC) polyesters were studied by dynamic x-ray diffraction using a synchrotron radiation source. Powder and fiber samples were examined by continuous heating from 50°C to 270°C in a hot stage. The polymer systems consisted of two types of thermotropic polyesters with mesogenic cores composed of combinations of substituted terephthalate, oxybenzoate and hydroquinone units combined with aliphatic spacers placed in the main chain. One of these samples was a chemically homogeneous LC polyester (HTH12) while the other LC polyester possessed chemical heterogeneity (BP6). BP6 could also be processed to form fibers which showed thermal transition behavior by x-ray diffraction and no detectable melting or clearing transition by thermal measurements. LC textures were observed using polarized light microscopy. Results of the dynamic x-ray diffraction studies of these two LC polymers are described. 0887-6266 08876266 Wiley-Blackwell |
| shingle_catch_all_4 | Ober, C. K. Delvin, A. Bluhm, T. L. Dynamic x-ray diffraction studies of liquid-crystalline polyesters Chemistry Polymer and Materials Science Chemistry Polymer and Materials Science Mesophase transitions in liquid-crystalline (LC) polyesters were studied by dynamic x-ray diffraction using a synchrotron radiation source. Powder and fiber samples were examined by continuous heating from 50°C to 270°C in a hot stage. The polymer systems consisted of two types of thermotropic polyesters with mesogenic cores composed of combinations of substituted terephthalate, oxybenzoate and hydroquinone units combined with aliphatic spacers placed in the main chain. One of these samples was a chemically homogeneous LC polyester (HTH12) while the other LC polyester possessed chemical heterogeneity (BP6). BP6 could also be processed to form fibers which showed thermal transition behavior by x-ray diffraction and no detectable melting or clearing transition by thermal measurements. LC textures were observed using polarized light microscopy. Results of the dynamic x-ray diffraction studies of these two LC polymers are described. 0887-6266 08876266 Wiley-Blackwell |
| shingle_title_1 | Dynamic x-ray diffraction studies of liquid-crystalline polyesters |
| shingle_title_2 | Dynamic x-ray diffraction studies of liquid-crystalline polyesters |
| shingle_title_3 | Dynamic x-ray diffraction studies of liquid-crystalline polyesters |
| shingle_title_4 | Dynamic x-ray diffraction studies of liquid-crystalline polyesters |
| sigel_instance_filter | dkfz geomar wilbert ipn albert |
| source_archive | Wiley InterScience Backfile Collection 1832-2000 |
| timestamp | 2024-05-06T10:14:25.611Z |
| titel | Dynamic x-ray diffraction studies of liquid-crystalline polyesters |
| titel_suche | Dynamic x-ray diffraction studies of liquid-crystalline polyesters |
| topic | V U |
| uid | nat_lic_papers_NLM163951837 |