Rheological and Mechanical Properties of Poly (α-Methylstyreneco- acrylonitrile)/Poly (Methylacrylate-co-methyl methacrylate) Blends in Miscible and Phase-Separated Regimes of Various Morphologies. Part IV. Influence of the Morphology on the Mechanical Properties (IUPAC Technical Report)
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Rheological and Mechanical Properties of Poly (α-Methylstyreneco- acrylonitrile)/Poly (Methylacrylate-co-methyl methacrylate) Blends in Miscible and Phase-Separated Regimes of Various Morphologies. Part IV. Influence of the Morphology on the Mechanical Properties (IUPAC Technical Report)
by V. Altstädt, L. De Lucca Freitas, and D.W.Schubert
Pure and Applied Chemistry
Vol. 76, No. 2, pp. 389–413 (2004)
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| Chemical structures of PαMSAN and PMMA. |
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| Scanning electron micrograph of the annealed PαMSAN/PMMA 40/60 blend. Crack propagation velocity: 10-5 mm/cycle. (Magnification: 130x) |
Influences of the morphology on the thermal and mechanical properties of poly (α-methylstyrene-co-acrylonitrile)/poly(methylacrylate-co-methyl methacrylate) (PαMSAN/PMMA) blends have been investigated. Differential scanning calorimetry (DSC) measurements confirmed that all blends were phase separated due to the temperature at which they were extruded and squeeze molded. Based on the cloud points of 17 blends and transmission electron microscopy (TEM) micrographs, the interaction parameters as a function of temperature and composition were calculated for the lower critical solution temperature (LCST) system. The morphology of the system was varied by annealing without changing its composition, but no clear conclusions on the influence of morphology on fracture toughness could be. In situ strained thin sections in the TEM indicated no effect of annealing on the micromechanical behavior. Shear deformation was observed as the prevailing deformation mechanism in the PαMSAN and fibrillized crazing in the PMMA-rich blends. From the features of the fracture surface investigated by scanning electron microscopy (SEM), the conclusion can be drawn that the fatigue crack propagates faster in the more brittle PαMSAN phase, but the overall advance of the crack front is controlled at the interphases, resulting in a crack propagation gradient along the interphase.
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- Rheological and Mechanical Properties of Poly (α-Methylstyreneco- acrylonitrile)/Poly (Methylacrylate-co-methyl methacrylate) Blends in Miscible and Phase-Separated Regimes of Various Morphologies. Part IV. Influence of the Morphology on the Mechanical Properties (IUPAC Technical Report)
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Articles in the same Issue
- Contents
- Extending the Role of IUPAC Within the Worldwide Chemistry Community
- Short Bio on Bryan Henry
- The Year of Chemistry in Germany
- Research and Education in the Middle East
- Meeting Planning and Organization
- Recommendations and Outcomes
- A New Society Aims High for its Island Nation and the Indian Ocean Region
- The IUPAC Solubility Data Project: A Brief History
- 2004 Thieme–IUPAC Prize in Synthetic Organic Chemistry
- Strong Science and Technology Capacity–A Necessity for Every Nation
- New Best Estimates of the Values of the Fundamental Constants
- Chemistry in Japan–A Report from the National Committee for Chemistry
- The Placement of Hydrogen in the Periodic Table
- Standard Definitions of Terms Related to Mass Spectrometry
- Terminology, Quantities, and Units Concerning Production and Applications of Radionuclides in Radiopharmaceutical and Radioanalytical Chemistry
- Toward a Core Organic Chemistry Curriculum for Latin American Universities
- Provisional Recommendations
- Rheological and Mechanical Properties of Poly (α-Methylstyreneco- acrylonitrile)/Poly (Methylacrylate-co-methyl methacrylate) Blends in Miscible and Phase-Separated Regimes of Various Morphologies. Part IV. Influence of the Morphology on the Mechanical Properties (IUPAC Technical Report)
- Determination of Trace Elements Bound to Soils and Sediment Fractions (IUPAC Technical Report)
- Terminology for Analytical Capillary Electromigration Techniques (IUPAC Recommendations 2003)
- Structure and Dynamics in Liquids
- Special Topic Articles Featuring the 2003 Winners of the IUPAC Prize for Young Chemists
- The Red Book II in Hungarian
- Alkali and Alkaline Earth Metal Pseudohalides
- IUPAC Handbook 2004–2005
- Emerging Issues in Analytical Chemistry
- XVII Mendeleev Congress on General and Applied Chemistry
- Joint Meeting on Medicinal Chemistry–Kraków 2003
- Functional and Nano-Systems
- Pharmaceutical R&D
- Natural Products
- Analytical Chemistry
- Soil Science
- Trace Elements
- Environmental and Clinical Analysis
- Mark Your Calendar
