The effect of hydroxyl-functionalization on the structure and properties of polypropylene

Sahil Gupta, R. A. Weiss, T. C.M. Chung

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Hydroxyl-modified polypropylcncs (PPOH) with side chains containing OH groups were synthesized by the copolymerization of propylene with undecenyl- oxytrimethylsilane monomer. Copolymers with OH concentration ranging from 1.3 to 3.9 mol% were produced and their properties compared with unmodified polypropylene. The presence of intermolecular H-bonding between the OH groups affected the base polypropylene structure as well as its thermal and rheological properties. As predicted by Flory's theory of melting point depression in copolymers, the melting point reduced with increasing [OH]. While the crystal structure remained unaffected, the crystal size reduced by approx. 15%. Crystallinity for PPOH polymers was also reduced by as much as 40% because of the hindrance to the ordered packing of backbone chains into the lamellar structure. On the other hand, the rheological properties such as the melt strength and the elasticity increased for the PPOH polymers. PPOH with only 3.9 mol% OH groups displayed a gel-like rheological behavior suggesting the formation of a weak clastic network in the melt.

Original languageEnglish (US)
Title of host publication71st Annual Technical Conference of the Society of Plastics Engineers 2013, ANTEC 2013
PublisherSociety of Plastics Engineers
Pages1874-1877
Number of pages4
ISBN (Print)9781632665300
StatePublished - Jan 1 2013
Event71st Annual Technical Conference of the Society of Plastics Engineers 2013, ANTEC 2013 - Cincinnati, OH, United States
Duration: Apr 22 2013Apr 24 2013

Publication series

NameAnnual Technical Conference - ANTEC, Conference Proceedings
Volume3

Other

Other71st Annual Technical Conference of the Society of Plastics Engineers 2013, ANTEC 2013
CountryUnited States
CityCincinnati, OH
Period4/22/134/24/13

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Polymers and Plastics

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  • Cite this

    Gupta, S., Weiss, R. A., & Chung, T. C. M. (2013). The effect of hydroxyl-functionalization on the structure and properties of polypropylene. In 71st Annual Technical Conference of the Society of Plastics Engineers 2013, ANTEC 2013 (pp. 1874-1877). (Annual Technical Conference - ANTEC, Conference Proceedings; Vol. 3). Society of Plastics Engineers.