書誌事項
- タイトル別名
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- The Transition Temperature of Polyethylene Isophthalate
- Terephthalate Copolymer
- 共重合体の転移点
- 公開日
- 1957
- DOI
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- 10.1295/koron1944.14.649
- 公開者
- 公益社団法人 高分子学会
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説明
The equilibrium melting temperature of crystalline polyethylene terephthalate is depressed by copolymerized ethylene isophthalate units and the following Flory relationship between crystallite melting point and mole fraction of the units forming the crystallites shows fair agreement with the results obtained.(1Tm)-(1/Tm) =-(R/hn)·lnXFrom this, the latent heat of fusion per ethylene terephthalate unit is calculated to be about 2600 calories.Specific volume-temperature measurements carried out dilatometrically on amorphous polyethylene terephthalate and its copolymers over a temperature range of 20° to 70°, indicate two second-order transitions in each case.The change in the expansion coefficient at the lower transition (at 34°-40°C) is unusually small, but unmistakable.The upper transition point is lowered linearly, at least up to 20% in mole fraction, by copolymerized ethylene isophthalate unit.If such copolymers are melt-spun, oriented by drawing to produce fibers and dyed with a non-ionic dye (e.g.with an aqueous solution of p-aminoazobenzene as a model of disperse dye), the increase in the equilibrium dye uptake is found to be linearly related to the percentage amount of ethylene isophthalate in the copolymer, demonstrating the increased dye receptivity due to the lowering of the degree of orientation and crystallinity.
収録刊行物
-
- 高分子化學
-
高分子化學 14 (152), 649-653, 1957
公益社団法人 高分子学会
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詳細情報 詳細情報について
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- CRID
- 1390282681497272576
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- NII論文ID
- 130003835262
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- ISSN
- 18848079
- 00232556
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可
