Development of in situ blends of poly(p-oxybenzoate-co-p-phenyleneisophthalate) with other thermotropic liquid crystalline polymers
| Autor: | Larry F. Charbonneau, H. Clay Linstid, James P. Shepherd, Gordon W. Calundann, Balaram Gupta, Linda C. Sawyer |
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| Rok vydání: | 1994 |
| Předmět: |
chemistry.chemical_classification
In situ Materials science Polymers and Plastics General Chemistry Polymer Thermotropic crystal Surfaces Coatings and Films chemistry.chemical_compound Monomer chemistry Polymerization Liquid crystal Polymer chemistry Materials Chemistry In situ polymerization Melt flow index |
| Zdroj: | Journal of Applied Polymer Science. 53:575-586 |
| ISSN: | 1097-4628 0021-8995 |
| DOI: | 10.1002/app.1994.070530510 |
| Popis: | A new in situ polymerization method is discussed wherein monomers of the major component are polymerized in the presence of a preformed thermotropic liquid crystalline polymer (LCP). Poly(p-oxybenzoate-co-p-phenyleneisophthalate) (HIQ) was chosen for this study. HIQ is well known to have a narrow process window and to be difficult to process reproducibly, both drawbacks for a commercial product. An in situ polymerization of the HIQ monomers in the presence of a fully polymerized LCP, such as poly(4-oxybenzoate-co-6-oxy-2-naphthoate) (CO) results in the “CO–HIQ” in situ blend. The in situ blend exhibited reduced biphasic morphology and was more homogeneous than was HIQ. The glass fiber-filled CO–HIQ resin also featured improved melt flow and more reproducible mechanical properties than those of HIQ. The in situ blends were characterized by optical microscopy, 1H-NMR, and melt rheology. The effect of the LCP level on the morphology of the in situ blend is discussed. © 1994 John Wiley & Sons, Inc. |
| Databáze: | OpenAIRE |
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