| In-situ reinforcement of PET monofilaments | ||
| Contact: Reiner Giesa, Hans-Werner Schmidt | ||
Poly(ethylene terephthalate) (PET) fibers are employed in industrial applications such as tire cords, composites, belts, and textiles. For these applications an improvement in fiber modulus without sacrificing tenacity accompanied by a minimal increase in manufacturing costs would be readily accepted by industry. One concept of PET fiber reinforcement is the formation of in-situ composites with thermotropic liquid crystalline polyesters (TLCP). The objective of the work in this research project was the evaluation of a newly developed amorphous TLCP as an in-situ reinforcement component in PET blend fibers. A typical fibrillar microstructure of the TLCP for as-spun fibers was found in SEM (figure left) investigations. The modulus of hot-drawn blend fibers blend showed a modest increase in modulus of about 22 % to 22.6 GPa at 1200 MPa tenacity and a load level 3 wt% was determined. 
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List of publications
| Grasser, W.; Schmidt, H.-W.; Giesa, R.: Thermotropic liquid crystalline copolyesters with non-coplanar biphenylene units tailored for blend fiber processing with PET, Polymer, 42, 8529-8540 (2001) |
| Grasser, W.; Schmidt, H.-W.; Giesa, R.: Fibers spun from poly(ethylene terephthalate) blended with a thermotropic liquid crystalline copolyester with non-coplanar biphenylene units, Polymer, 42, 8517-8527 (2001) |
| Giesa, R.; Joslin, S.; Melot, D.; Farris, R.J.: Properties of Fibers Spun from Blends of a Thermotropic Liquid Crystalline Block Copolymer with Poly(ethyleneterephthalate), Polymers & Polymer Composites, 3(5), 333 (1995) |
| Giesa, R.; Joslin, S.; Farris, R.J.: Thermotropic Liquid Crystalline Polymers with flexible Moieties blended with Poly(ethylene terephthalate), Polymer, 35, 4303 (1994) |
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