Experimental data are obtained for the extent of swelling and progress of the step-growth swollen-state polymerization (SwSP ) of polyethylene terephthalate (PET). The SwSP is carried out in biphenyl and diphenyl ether mixture (26 : 74 w/ w) solvent under appropriate conditions designed to understan
Synthesis of ultra-high molecular weight poly(ethylene terephthalate) by swollen-state polymerization
โ Scribed by Susumu Tate; Yhoichi Watanabe; Akira Chiba
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 586 KB
- Volume
- 34
- Category
- Article
- ISSN
- 0032-3861
No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
High-speed spinning of high molecular weight poly(ethylene terephthalate) (PET) having an intrinsic viscosity of 0.98 dL/g was performed at the take-up velocity range of 2.5-5.5 km/min. The structure of the as-spun filaments was analyzed by density, birefringence, WAXS, DSC, boiling water shrinkage,
WAXS, DSC, and IR methods have been employed to follow the crystallization of poly(ethy1ene terephthalate) as a function of molecular weight. The degree of order, which is a measure of the extent of crystallization, decreased with increasing molecular weight. The degree of reduction in the molecular