Insight into the Influence of Properties of Poly(Ethylene-co-octene) with Different Chain Structures on Their Cell Morphology and Dimensional Stability Foamed by Supercritical CO2
Abstract
:1. Introduction
2. Experimental
2.1. Materials and Foam Preparations
2.1.1. Batch Foaming Process
2.1.2. Shrinking Process of POE Foam Sample
2.1.3. CO2 Desorption Process
2.2. Characterizations
2.2.1. 13C NMR Procedures
2.2.2. Differential Scanning Calorimetry (DSC) Analysis
2.2.3. Wide-Angle-X-ray Diffraction (WAXD) Analysis
2.2.4. Rheological Properties Measurement
2.2.5. Mechanical Property Measurement
2.2.6. Thermo-Mechanical Property Measurement
2.2.7. Foam Characterization
2.2.8. Air Permeability in POEs
3. Results and Discussion
3.1. Crystallization and Melting Behavior of Different POEs
3.2. Rheological Properties of POE
3.3. Foaming Behaviors
3.4. Dimensional Stability of POE Foams
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Sample Number | Density (g/cm3) | Mw (g/mol) | Mn (g/mol) | Mw/Mn | Melting Index |
---|---|---|---|---|---|
POE1 | 0.857 | 110,268 | 41,508 | 2.66 | 1 |
POE2 | 0.885 | 78,669 | 33,719 | 2.33 | 1 |
POE3 | 0.902 | 89,888 | 33,458 | 2.69 | 1 |
POE4 | 0.902 | 81,983 | 30,357 | 2.70 | 3 |
POE5 | 0.902 | 68,618 | 26,928 | 2.55 | 4.3 |
Sample | Octene Content (%) | EEE (%) | EEO + OEE (%) | OEO (%) | EOE (%) | EOO + OOE (%) | OOO (%) |
---|---|---|---|---|---|---|---|
POE1 | 16.54 | 60.91 | 22.12 | 1.45 | 11.69 | 3.54 | 0.41 |
POE2 | 8.34 | 73.82 | 15.83 | 0.61 | 7.91 | 0.98 | 0 |
POE3 | 4.48 | 86.13 | 9.42 | 0 | 4.09 | 0.39 | 0 |
POE4 | 4.89 | 84.91 | 10.15 | 0.48 | 3.73 | 0.72 | 0 |
POE5 | 4.92 | 83.81 | 10.71 | 0.52 | 4.36 | 0.33 | 0 |
Sample | 0.1 MPa N2 | 11 MPa CO2 | ||||
---|---|---|---|---|---|---|
Tc (°C) | Tm (°C) | Xc (%) | Tc (°C) | Tm (°C) | Xc (%) | |
POE1 | -- | 49.3 | -- | -- | 48.1 | -- |
POE2 | 59.1 | 78.5 | 8.2 | 57.6 | 74.5 | 1.1 |
POE3 | 80.5 | 102.4 | 15.1 | 75.5 | 97.7 | 9.2 |
POE4 | 77.7 | 102.2 | 14.8 | 74.1 | 96.8 | 8.4 |
POE5 | 77.5 | 102.1 | 14.7 | 73.5 | 96.5 | 8.1 |
Sample | c | λ | η0 |
---|---|---|---|
POE1 | 0.46 | 42.38 | 226,013.6 |
POE2 | 0.43 | 6.63 | 63,787.3 |
POE3 | 0.40 | 119.39 | 233,983.3 |
POE4 | 0.42 | 6.15 | 52,149.6 |
POE5 | 0.45 | 0.88 | 16,610.2 |
Sample Number | Peair (kg gas/(m·s·MPa) | PeCO2 (kg gas/(m·s·MPa) | Compression Modulus (MPa) |
---|---|---|---|
POE1 | 4.66 × 10−10 | 2.43 × 10−8 | 9.67 |
POE2 | 4.49 × 10−10 | 4.92 × 10−9 | 22.95 |
POE3 | 4.20 × 10−10 | 2.83 × 10−9 | 38.78 |
POE4 | 4.60 × 10−10 | 3.23 × 10−9 | 36.54 |
POE5 | 4.72 × 10−10 | 3.44 × 10−9 | 34.55 |
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Li, D.; Chen, Y.; Yao, S.; Zhang, H.; Hu, D.; Zhao, L. Insight into the Influence of Properties of Poly(Ethylene-co-octene) with Different Chain Structures on Their Cell Morphology and Dimensional Stability Foamed by Supercritical CO2. Polymers 2021, 13, 1494. https://0-doi-org.brum.beds.ac.uk/10.3390/polym13091494
Li D, Chen Y, Yao S, Zhang H, Hu D, Zhao L. Insight into the Influence of Properties of Poly(Ethylene-co-octene) with Different Chain Structures on Their Cell Morphology and Dimensional Stability Foamed by Supercritical CO2. Polymers. 2021; 13(9):1494. https://0-doi-org.brum.beds.ac.uk/10.3390/polym13091494
Chicago/Turabian StyleLi, Dongyang, Yichong Chen, Shun Yao, Hong Zhang, Dongdong Hu, and Ling Zhao. 2021. "Insight into the Influence of Properties of Poly(Ethylene-co-octene) with Different Chain Structures on Their Cell Morphology and Dimensional Stability Foamed by Supercritical CO2" Polymers 13, no. 9: 1494. https://0-doi-org.brum.beds.ac.uk/10.3390/polym13091494