Abstract
Carbon-13 NMR analysis of chain branching in low density polyéthylène (LDPE) at 62,89 MHz has revealed the existence of three kinds of complex chain branching besides more than four kinds of well known isolated branches. Well resolved carbon-13 spectra consisting of 26 peaks have been observed for one LDPE sample. For reasonable assignments of all the carbon atoms which play roles in branching signals, model compounds have been used, and three kinds of additivity rules for carbon-13 chemical shifts have been applied. Taking into account the double back-biting scheme in the formation of LDPE, 2-ethyl hexyl, 1,3-diethyl pair and tetrafunctionnal branches have been found besides isolated branches such as ethyl, butyl, pentyl, hexyl and longer chains.
Sign-in/Register to access full text options 
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 callDisclaimer: 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.
