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Journal of Polymer Research

, 23:27 | Cite as

2,5-Di-(2-ethylhexanoylperoxy)-2,5-dimethylhexane as difunctional radical initiator in reverse iodine transfer polymerization (RITP) of styrene, methyl methacrylate and butyl acrylate

  • Francisco J. Enríquez-Medrano
  • Alejandro M. Villa-Hernández
  • Hortensia Maldonado-Textle
  • Ramiro Guerrero-SantosEmail author
  • Patrick Lacroix-DesmazesEmail author
Original Paper

Abstract

The use of 2,5-di-(2-ethylhexanoylperoxy)-2,5-dimethylhexane (T141) as difunctional radical initiator in Reverse Iodine Transfer Polymerization (RITP) was studied at 80 °C (k d,T141 = 9.6 × 10−5 s−1) for styrene (St), methyl methacrylate (MMA) and butyl acrylate (BuA). Firstly, the apparent efficiency coefficients α and β were determined by RITP of St, MMA and BuA using monofunctional initiators such as dilaurylperoxide (LYP) at 73 °C (k d,LYP = 9.6 × 10−5 s−1) and bis(4-tert-butylcyclohexyl)peroxydicarbonate (P16S) at 59 °C (k d,P16S = 9.6 × 10−5 s−1). The decomposition of the monofunctional initiators LYP and P16S generates free radicals with similar structures as those produced during the homolysis of T141. Once the polymerization reactions were performed, monomer conversions were determined by proton nuclear magnetic resonance and the molecular weights Mn,exp were obtained by size exclusion chromatography. Thus, the following apparent efficiency coefficients were calculated: α = 0.41 and β = 1.00 for St, α = 0.14 and β = 0.75 for MMA and α = 0.07 and β = 0.14 for BuA. Afterwards, these values were successfully tested in RITP using an asymmetric initiator such as tert-amyl peroxy-2-ethylhexanoate (T121). In addition, the RITPs were performed for all three monomers using T141 as difunctional initiator. The results prove that the calculated values for α and β were consistent, since the theoretical molecular weights in all polymeric samples match well with the Mn,exp.

Keywords

Peroxide difunctional initiator RITP Vinyl monomers 

Notes

Acknowledgments

The authors of this paper would like to thank CONACYT (Consejo Nacional de Ciencia y Tecnología, Mexico) for the financial support of this research. The authors also thank the French-Mexican PCP program to favor the cooperation between the two countries. Judith Cabello and Abdelatif Manseri are also acknowledged for their technical support.

Supplementary material

10965_2016_916_MOESM1_ESM.docx (157 kb)
ESM 1 (DOCX 157 kb)

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Copyright information

© Springer Science+Business Media Dordrecht 2016

Authors and Affiliations

  • Francisco J. Enríquez-Medrano
    • 1
    • 2
  • Alejandro M. Villa-Hernández
    • 1
  • Hortensia Maldonado-Textle
    • 2
  • Ramiro Guerrero-Santos
    • 2
    Email author
  • Patrick Lacroix-Desmazes
    • 1
    Email author
  1. 1.Institut Charles Gerhardt (ICG), UMR-5253, CNRS, Université Montpellier, ENSCM. Ingénierie et Architectures Macromoléculaires (IAM), Ecole Nationale Supérieure de Chimie de MontpellierMontpellierFrance
  2. 2.Departamento de Síntesis de PolímerosCentro de Investigación en Química AplicadaSaltilloMéxico

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