The formation of crosslinked polymers during the anionic polymerization of lactams

Frunze, T. M.; Kurashev, V.V.; Zaĭtsev, V. I.; Shleifman, R.B.; Korshak, V. V.

doi:10.1016/0032-3950(74)90407-9

Cited by 5 publications

(1 citation statement)

References 6 publications

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“…The compounds of different structures including macromolecular ones with graft acyllactam groups are used as polymerization activators [22]. In this process the linkages have an imide nature and are formed due to the inter- action of amide anions and the terminal PCAs acyllactam groups [23]. A gel-fraction in m-cresol for all the obtained copolymers reaches 69-96%.…”

Section: Anionic Polymerization Of 1-caprolactammentioning

confidence: 99%

Copolymers Obtained by ε-Caprolactam and Methyl Methacrylate Polymerization in the Presence of Polyimides

Vygodskii

Volkova

Batalova

et al. 2009

High Performance Polymers

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New copolymers have been synthesized by anionic or radical photopolymerization of ε-caprolactam or methyl methacrylate (MMA) in the presence of dissolved polyimides bearing hexafluoroisopropylidene, fluorene or other groups. Using diimides as models it was shown that the kinetics of anionic polymerization of ε-caprolactam depends on the nature of spacer between the imide cycles. The mechanical and tribological properties of copolymers, their water absorbance and the microstructure of copolymer films were studied. It was found that upon the selection of polyimide activator it was possible to gain the desirable control over the polymer properties, namely, the gel fraction content, phase composition, compression modulus, notched Izod impact strength, friction coefficient and temperature of frictional contact. The kinetics of radical polymerization of MMA in the presence of polyimide and model diimide has been studied by differential scanning photocalorimetry and infrared spectroscopy. From the results of the reaction kinetics and the study of polymer structures by Fourier transform infrared spectroscopy, nuclear magnetic resonance, size-exclusion chromatography and thermogravimetric analysis it has been established that radical photopolymerization of MMA in the presence of polyimide leads to the formation of copolymers owing to chain transfer reactions and/or chain termination by the relevant condensation polymer. It has been established that the imide cycles play a significant role in the formation of both copolymers with ε-caprolactam and MMA, respectively.

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Section: Anionic Polymerization Of 1-caprolactammentioning

confidence: 99%