Comparation of Polyethylene and Polypropylene on the Time-Temperature Superposition Principle by Molecular Dynamics Simulations
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- Material Type
- 記事
- Author/Editor
- Shihong YUANTakenobu SAKAI
- Author Heading
- Periodical title
- Advanced experimental mechanics / Editorial board for advanced experimental mechanics [編]
- No. or year of volume/issue
- 10:2025.8
- Volume
- 10
- Pages
- 27-32
- Publication date of volume/issue (W3CDTF)
- 2025-08
- ISSN (Periodical Title)
- 2189-4752
- ISSN-L (Periodical Title)
- 2189-4752
- Publication (Periodical Title)
- Niigata : The Japanese Society for Experimental Mechanics
- Place of Publication (Country Code)
- JP
- Text Language Code
- eng
- Subject Heading
- NDLC
- Target Audience
- 一般
- Holding library
- 国立国会図書館
- Call No.
- Z63-D560
- 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)
- 034429776
- Bibliographic Record Category (NDL)
- 632
- Summary, etc.
- <p>Polymers and their composites are widely used in aerospace, energy, and automotive industries due to their lightweight, manufacturability, and high impact resistance. Predicting the viscoelastic behavior of these materials is crucial for ensuring their reliability and durability. The Time-Temperature Superposition Principle (TTSP) is commonly used to predict long-term viscoelastic properties like creep and stress relaxation, but its molecular mechanisms are not fully understood. This study employs molecular dynamics simulations to investigate these mechanisms in polyethylene (PE), and polypropylene (PP) with methyl group. Creep analyses at various temperatures show that PP exhibits superior creep resistance compared to PE. Furthermore, the role of free volume was examined, showing that the methyl groups in PP contribute to more stable free volume changes. This study also shows the importance of torsion potential energy for TTSP and demonstrates that the presence of methyl groups primarily affects TTSP through bond and angle potential energies. This study clarified the effect of the presence or absence of methyl groups on TTSP.</p>
- DOI
- 10.11395/aem.25-0001
- 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.
- <p>Polymers and their composites are widely used in aerospace, energy, and automotive industries due to their lightweight, manufacturability, and high impact resistance. Predicting the viscoelastic behavior of these materials is crucial for ensuring their reliability and durability. The Time-Temperature Superposition Principle (TTSP) is commonly used to predict long-term viscoelastic properties like creep and stress relaxation, but its molecular mechanisms are not fully understood. This study employs molecular dynamics simulations to investigate these mechanisms in polyethylene (PE), and polypropylene (PP) with methyl group. Creep analyses at various temperatures show that PP exhibits superior creep resistance compared to PE. Furthermore, the role of free volume was examined, showing that the methyl groups in PP contribute to more stable free volume changes. This study also shows the importance of torsion potential energy for TTSP and demonstrates that the presence of methyl groups primarily affects TTSP through bond and angle potential energies. This study clarified the effect of the presence or absence of methyl groups on TTSP.</p>
- DOI
- 10.11395/aem.25-0001
- Access Restrictions
- インターネット公開
- 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科学研究費助成事業データベース
- Bibliographic ID (NDL)
- 034429776