X-RAY STUDY OF STRUCTURAL REARRANGEMENTS IN SOLVENT-CRAZED SEMICRYSTALLINE POLY(ETHYLENE-TEREPHTHALATE) DURING TENSILE DRAWING IN A LIQUID ENVIRONMENT AND DRYING

Citation
Iv. Bykova et al., X-RAY STUDY OF STRUCTURAL REARRANGEMENTS IN SOLVENT-CRAZED SEMICRYSTALLINE POLY(ETHYLENE-TEREPHTHALATE) DURING TENSILE DRAWING IN A LIQUID ENVIRONMENT AND DRYING, Vysokomolekularnye soedinenia. Seria A, 39(1), 1997, pp. 116-123
Citations number
21
Categorie Soggetti
Polymer Sciences
ISSN journal
05075475
Volume
39
Issue
1
Year of publication
1997
Pages
116 - 123
Database
ISI
SICI code
0507-5475(1997)39:1<116:XSOSRI>2.0.ZU;2-Z
Abstract
Structural rearrangements in solvent-crazed semicrystalline PET that t ake place during tensile drawing of polymer in the presence of surface -active liquid environments and further drying under various condition s were characterized by X-ray analysis. Application of both SAXS and W AXS allowed one to put forth a new approach for estimation of the para meters of microporous structure of the crazed samples. During tensile drawing of semicrystalline PET to high tensile strains (330%), crazes with highly disperse structure and high specific surface area were sho wn to be preserved. As compared with amorphous PET, in the case of sem icrystalline PET, irregular arrangement of craze fibrils in the crazes was observed. This disorder was likely to be accounted for by the eff ect of supermolecular structure of semicrystalline polymer on the deve lopment of craze fibrils during solvent crazing.