Abstract

Small angle neutron scattering (SANS) has been used to investigate the conformations of linear and cyclic poly(dimethylsiloxanes) (PDMS) in chemically identical undiluted blends over a range of molar mass and composition. Symmetrical (molar masses of the two components closely matched) and asymmetrical (molar masses of the two components significantly different) isotopic blends of linear hydrogenated PDMS (H-PDMS) and linear deuterated PDMS (D-PDMS) were shown to have radii of gyration, which agreed with theoretical predictions for random-coil linear polymers obeying Gaussian statistics. Blends of cyclic H-PDMS and cyclic D-PDMS showed that the PDMS cyclics adopt more expanded average conformations in such melts.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

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.