Crystallization Behavior of Poly (ethylene terephthalate) Copolymers Containing p,p'-Quaterphenyldicarboxylic Acid or 4,4'-Diphenyldicarboxylic Acid.
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- Sakaguchi Yoshimitsu
- Toyobo Research Center Co., Ltd.
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Abstract
Copolymers of poly(ethylene terephthalate) (PET) containing small amounts of 4,4’-diphenyldicarboxylic acid (DP) and p,p’-quaterphenyldicarboxylic acid (QP) were prepared and their crystallization behavior was characterized by isothermal crystallization with the time-resolved light scattering method. The DP-containing copolymers showed spherulitic growth like PET homopolymer. The crystallization rate for DP-containing copolymers decreased and the induction time increased with comonomer content, which showed that DP unit disturbed the crystallization of PET segments. In the case of QP-containing copolymers, accelerated crystal nucleation was observed for 5–7.5 mol% copolymers. However, their crystallization rates were the same order as that of PET. Remarkable increase in crystallization rate, observed for some rigid arylate units-containing copolyesters in previous works, was not detected in these copolymers. The rigidity of QP is high enough to induce the aggregation of QP-rich segments, but the following orientation of ethylene terephthalate chains seems not to be accelerated in the course of crystallization.
Journal
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- Polymer Journal
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Polymer Journal 33 (9), 654-661, 2001
The Society of Polymer Science, Japan
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Keywords
Details 詳細情報について
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- CRID
- 1390001206289089664
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- NII Article ID
- 130004430339
- 10010077471
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- NII Book ID
- AA00777013
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- COI
- 1:CAS:528:DC%2BD3MXntVGktrw%3D
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- ISSN
- 13490540
- 00323896
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- NDL BIB ID
- 5914187
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed