溶融高分子の異常流動性に関する研究 (レオロジー(特集))
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- Material Type
- 記事
- Title
- Author/Editor
- 大柳 康 他
- Series Title
- Author Heading
- Periodical title
- 材料 / 日本材料学会 [編]
- No. or year of volume/issue
- 20(212) 1971.05
- Volume
- 20
- Issue
- 212
- Pages
- 659～664
- Publication date of volume/issue (W3CDTF)
- 1971-05
- ISSN (Periodical Title)
- 0514-5163
- ISSN-L (Periodical Title)
- 0514-5163
- Publication (Periodical Title)
- 京都 : 日本材料学会
- Place of Publication (Country Code)
- JP
- Text Language Code
- jpn
- NDLC
- Target Audience
- 一般
- Holding library
- 国立国会図書館
- Call No.
- Z14-267
- Data Provider (Database)
- 国立国会図書館 : 国立国会図書館雑誌記事索引
- Bibliographic ID (NDL)
- 8220184
- Bibliographic Record Category (NDL)
- 632
- Summary, etc.
- It is the object of the present study to inquire experimentally into the irregular flow behaviors of polymer melts in short capillary passages. The polymers tested are polyethylenes of high density, and three kinds of experimental methods, such as the flow property test by using KÔKA-type flow tester, the observation on flow patterns in a reservoir or on extrudates by using a test piece with flow marker of carbon black, and observation on the fringe patterns at the capillary inlet or in the capillary passage by using polarized light were used.<br>The results obtained are as follows;<br>(1) Four kinds of the types of extrudates, such as normal flow, spiraling flow, melt fracture flow and solid state fracture flow induced by the pressure were observed.<br>(2) The polarizing fringe at the capillary inlet is similar to a horse's hoof in shape in the normal flow region, and the number of fringes is directly proportional to the amount of apparent shear rate at the capillary wall.<br>(3) The polarizing fringe under spiraling or in the melt fracture flow regions has an unsteadly special shape, such as twisting or pulsation, and it seems reasonable that twisting of the polarizing fringe is induced by a small slippage or lecal high shear rate at or near the capillary inlet and causes the extrudate to flow spiraling. The pulsation of polarizing fringe is induced by the large slip or high shear rate which is generated on an inversed conical surface with a vertex angle about 30 degree in a reservoir and causes the extrudate to augment the melt fracture.
- DOI
- 10.2472/jsms.20.659
- Access Restrictions
- インターネット公開
- Data Provider (Database)
- 科学技術振興機構 : J-STAGE
- Summary, etc.
- It is the object of the present study to inquire experimentally into the irregular flow behaviors of polymer melts in short capillary passages. The polymers tested are polyethylenes of high density, and three kinds of experimental methods, such as the flow property test by using KÔKA-type flow tester, the observation on flow patterns in a reservoir or on extrudates by using a test piece with flow marker of carbon black, and observation on the fringe patterns at the capillary inlet or in the capillary passage by using polarized light were used.<br>The results obtained are as follows;<br>(1) Four kinds of the types of extrudates, such as normal flow, spiraling flow, melt fracture flow and solid state fracture flow induced by the pressure were observed.<br>(2) The polarizing fringe at the capillary inlet is similar to a horse's hoof in shape in the normal flow region, and the number of fringes is directly proportional to the amount of apparent shear rate at the capillary wall.<br>(3) The polarizing fringe under spiraling or in the melt fracture flow regions has an unsteadly special shape, such as twisting or pulsation, and it seems reasonable that twisting of the polarizing fringe is induced by a small slippage or lecal high shear rate at or near the capillary inlet and causes the extrudate to flow spiraling. The pulsation of polarizing fringe is induced by the large slip or high shear rate which is generated on an inversed conical surface with a vertex angle about 30 degree in a reservoir and causes the extrudate to augment the melt fracture.
- DOI
- 10.2472/jsms.20.659
- Related Material (URI)
- Data Provider (Database)
- 国立情報学研究所 : CiNii Research
- Original Data Provider (Database)
- Japan Link Center雑誌記事索引データベースCrossrefCiNii Articles
- Bibliographic ID (NDL)
- 8220184
- NAID
- 110002300768