高分子材料の<i>p-v-T</i>特性に関する研究
書誌事項
- タイトル別名
-
- A Study on <i>p-v-T</i> Properties of Amorphous and Crystalline Polymers
抄録
The p-v-T device which we previously developed was used to investigate a polymethylmethacrylate (PMMA), a polycarbonate (PC) in the liquid and glassy states, a standard high density polyethylene (PE), a nylon-6 (PA 6) and a polyphenylene sulfide composites containing 40wt% glass fibers (PPS), ranging from the room temperature to 250°C and from the atmospheric pressure to the pressure of 187MPa. This purpose is to measure the p-v-T properties of these polymers in the three measurement techniques of isobaric, isothermal and isochoric. The results show that the straight line Tm′ which consists of each melting point Tm of PE in the isobaric technique is 15∼25°C higher than that in the isothermal technique. The gradient θb (in the isobaric) and the gradient θt (in the isothermal) of each v-T diagram at temperature beyond the Tm′ lines are θb<θt in the each pressure. The p-T diagrams of PMMA, PC, PA 6 and PPS obtained by the isochoric technique are presented in the two different straight lines. The intersection of these lines correspond to either the melting temperature Tm or the glass transition temperature Tq in the polymers, but those temperatures are 50∼80°C higher than the real temperature, because the loaded pressure of the polymer in a closed barrel was relaxed.
収録刊行物
-
- 成形加工
-
成形加工 3 (5), 351-358, 1991
一般社団法人 プラスチック成形加工学会
- Tweet
詳細情報 詳細情報について
-
- CRID
- 1390282679438483712
-
- NII論文ID
- 130003691374
-
- ISSN
- 18837417
- 09154027
-
- データソース種別
-
- JaLC
- Crossref
- CiNii Articles
-
- 抄録ライセンスフラグ
- 使用不可