Anionic copolymers of caprolactam with laurolactam (nylon copolymers) II. Crystallisation, glass transitions and tensile properties
| Autor: | Isaac Goodman, Aristides H. Kehayoglou |
|---|---|
| Rok vydání: | 1983 |
| Předmět: |
Materials science
Polymers and Plastics Organic Chemistry Caprolactam General Physics and Astronomy Amorphous solid law.invention chemistry.chemical_compound Crystallinity Polymerization chemistry Chemical engineering law Laurolactam Ultimate tensile strength Materials Chemistry Copolymer Crystallization Composite material |
| Zdroj: | European Polymer Journal. 19:321-325 |
| ISSN: | 0014-3057 |
| DOI: | 10.1016/0014-3057(83)90167-2 |
| Popis: | The crystalline of PCL/PLL random copolymers, prepared by anionic polymerisation in the melt and freed of residual monomer(s), vary with composition and are at a minimum for approx. 65 35 mole% composition. The Tg's of the copolymers show a minimum with composition; this effect is discussed in relation to the different co-unit compositions of the crystalline and the amorphous phases. The copolymers are tough thermoplastics with values of yield stress, stress at 100% elongation, and modulus all tending to a minimum for the compositions of lowest crystallinity and highest birefringence. The tensile strengths at break are independent of crystallinity and vary linearly with NH(CH2)5CO unit content. |
| Databáze: | OpenAIRE |
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