Influence of the chemical structure on the kinetics of the structural relaxation process of acrylate and methacrylate polymer networks

M. Salmerón Sánchez; Y. Touzé; A. Saiter; J. M. Saiter; J. L. Gómez Ribelles

doi:10.1007/s00396-004-1207-z

Influence of the chemical structure on the kinetics of the structural relaxation process of acrylate and methacrylate polymer networks

M. Salmerón Sánchez, Y. Touzé, A. Saiter, J. M. Saiter, J. L. Gómez Ribelles

Research output: Contribution to journal › Article › peer-review

26 Citations (Scopus)

Abstract

The enthalpy relaxation of poly(hydroxyethyl methacrylate) (PHEMA), poly(ethyl methacrylate) (PEMA) and poly(ethyl acrylate) (PEA) networks, obtained by DSC, are compared. The temperature interval of the glass transition broadens in the sequence PEA-PEMA-PHEMA. The plots of the enthalpy loss during the annealing for 200 min at different temperatures below T_g show that the structural relaxation process also takes place in PHEMA in a broader temperature interval than in PEA or PEMA. The modelling of the structural relaxation process using a phenomenological model allows determining the temperature dependence of the relaxation times concluding that the fragility in PHEMA is significantly lower than in PEMA. Both features are ascribed to the connectivity of the polymer chains in PHEMA via hydrogen bonding. The role of the presence of the methyl group bonded to the main chain is analysed by comparing the results obtained in PEA and PEMA.

Original language	English
Pages (from-to)	711-720
Number of pages	10
Journal	Colloid and Polymer Science
Volume	283
Issue number	7
DOIs	https://doi.org/10.1007/s00396-004-1207-z
Publication status	Published - Apr 1 2005
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physical and Theoretical Chemistry
Polymers and Plastics
Colloid and Surface Chemistry
Materials Chemistry

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title = "Influence of the chemical structure on the kinetics of the structural relaxation process of acrylate and methacrylate polymer networks",

abstract = "The enthalpy relaxation of poly(hydroxyethyl methacrylate) (PHEMA), poly(ethyl methacrylate) (PEMA) and poly(ethyl acrylate) (PEA) networks, obtained by DSC, are compared. The temperature interval of the glass transition broadens in the sequence PEA-PEMA-PHEMA. The plots of the enthalpy loss during the annealing for 200 min at different temperatures below Tg show that the structural relaxation process also takes place in PHEMA in a broader temperature interval than in PEA or PEMA. The modelling of the structural relaxation process using a phenomenological model allows determining the temperature dependence of the relaxation times concluding that the fragility in PHEMA is significantly lower than in PEMA. Both features are ascribed to the connectivity of the polymer chains in PHEMA via hydrogen bonding. The role of the presence of the methyl group bonded to the main chain is analysed by comparing the results obtained in PEA and PEMA.",

author = "{Salmer{\'o}n S{\'a}nchez}, M. and Y. Touz{\'e} and A. Saiter and Saiter, {J. M.} and {G{\'o}mez Ribelles}, {J. L.}",

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T1 - Influence of the chemical structure on the kinetics of the structural relaxation process of acrylate and methacrylate polymer networks

AU - Salmerón Sánchez, M.

AU - Touzé, Y.

AU - Saiter, A.

AU - Saiter, J. M.

AU - Gómez Ribelles, J. L.

PY - 2005/4/1

Y1 - 2005/4/1

N2 - The enthalpy relaxation of poly(hydroxyethyl methacrylate) (PHEMA), poly(ethyl methacrylate) (PEMA) and poly(ethyl acrylate) (PEA) networks, obtained by DSC, are compared. The temperature interval of the glass transition broadens in the sequence PEA-PEMA-PHEMA. The plots of the enthalpy loss during the annealing for 200 min at different temperatures below Tg show that the structural relaxation process also takes place in PHEMA in a broader temperature interval than in PEA or PEMA. The modelling of the structural relaxation process using a phenomenological model allows determining the temperature dependence of the relaxation times concluding that the fragility in PHEMA is significantly lower than in PEMA. Both features are ascribed to the connectivity of the polymer chains in PHEMA via hydrogen bonding. The role of the presence of the methyl group bonded to the main chain is analysed by comparing the results obtained in PEA and PEMA.

AB - The enthalpy relaxation of poly(hydroxyethyl methacrylate) (PHEMA), poly(ethyl methacrylate) (PEMA) and poly(ethyl acrylate) (PEA) networks, obtained by DSC, are compared. The temperature interval of the glass transition broadens in the sequence PEA-PEMA-PHEMA. The plots of the enthalpy loss during the annealing for 200 min at different temperatures below Tg show that the structural relaxation process also takes place in PHEMA in a broader temperature interval than in PEA or PEMA. The modelling of the structural relaxation process using a phenomenological model allows determining the temperature dependence of the relaxation times concluding that the fragility in PHEMA is significantly lower than in PEMA. Both features are ascribed to the connectivity of the polymer chains in PHEMA via hydrogen bonding. The role of the presence of the methyl group bonded to the main chain is analysed by comparing the results obtained in PEA and PEMA.

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Influence of the chemical structure on the kinetics of the structural relaxation process of acrylate and methacrylate polymer networks

Abstract

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