NDLI: Preparation of poly(vinyl acetate-co-dibutyl maleate)/ sodium-montmorillonite nanocomposite via in situ reverse iodine transfer radical polymerization

Content Provider	Springer Nature Link
Author	Farrokhi, Mojtaba Abdollahi, Mahdi
Copyright Year	2014
Abstract	Among other controlled radical polymerization techniques, reverse iodine transfer radical polymerization (RITP) has recently been developed for synthesis of polymers with controlled characteristics. In the present work, poly(vinyl acetate-co-dibutyl maleate)/ sodium montmorillonite (Na-MMT) nanocomposites were synthesized via bulk RITP of the vinyl acetate and dibutyl maleate in the presence of Na-MMT, molecular iodine and 2,2′-azobis(isobutyronitryle) (AIBN) at 70 °C. Effect of the Na-MMT loading on the conversion, molecular weight and its distribution were studied by $^{1}$H-NMR and GPC analyses respectively. Structure of the nanocomposites was investigated by XRD and TEM analyses. It was found that under similar conditions, conversion, copolymerization rate and molecular weight of the produced copolymers decrease in the presence of Na-MMT especially when the higher loading of nanoclay (5 wt%) is used. Also, molecular weight distribution increased in the presence of clay. It can be attributed to the existence of an interaction between the functional groups in the clay’s surface and the reactants as well as probably to the undesirable chain transfer reactions in the presence of nanoclay. Moreover, results showed that conversion and molecular weight of the copolymer increase by increasing iodine amount in a reaction mixture containing nanoclay, verifying again existence of the interaction between the functional groups in the clay’s surface and the reactants (I$_{2}$ and monomers). The XRD and TEM results indicated that intercalated structure is formed at a low conversion while exfoliated structure can also be formed at a higher conversion. Graphical Abstract Bulk revers iodine transfer radical polymerization of vinyl acetate (VAc) and dibutyl maleate (DBM) in the presence of I2 and AIBN was successfully employed to synthesize P(VAc-co-DBM) copolymer and its nanocomposites with sodium montmorillonite (Na-MMT).
Starting Page	1
Ending Page	8
Page Count	8
File Format	PDF
ISSN	10229760
Journal	Journal of Polymer Research
Volume Number	21
Issue Number	11
e-ISSN	15728935
Language	English
Publisher	Springer Netherlands
Publisher Date	2014-10-25
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Vinyl acetate (VAc) Dibutyl maleate (DBM) Reverse iodine transfer radical polymerization (RITP) Nanocomposite Synthesis and characterization Polymer Sciences Industrial Chemistry/Chemical Engineering Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Materials Chemistry Polymers and Plastics

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