Abstract
Lateral and end surface free energies of melt-crystallized isotactic polybutene-1 (it-PB1) trigonal and tetragonal crystals have been determined by small-angle X-ray scattering and in situ observation of the crystal growth kinetics. The lateral surface free energy σ of the trigonal phase is about seven times as large as the value σHoff calculated according to Hoffman's equation [Hoffman (1992). Polymer, 33, 2643–2644], while that of the tetragonal phase is roughly in agreement with the estimation. The discrepancy between the values of σ and σHoff for the trigonal phase can be attributed to the loss of conformational entropy of the ethyl side chains of it-PB1.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.