Polymerization of Dicyclopentadiene/Styrene in PolyHIPE

Abstract:

A series of porous poly(styrene-divinylbenzene) monoliths (polyHIPE) was synthesized by high internal phase emulsions (HIPE). The effects of the ethanol contents on the microstructure of the polyHIPE were characterized by scanning electron microscopy and mercury intrusion porosimeter. The adsorption and release behaviors of the polyHIPE for a monomer mixture consisting of dicyclopentadiene (DCPD) /styrene (St) (DS, mass ratio of 9/1) were investigated. The polymerization of the mixture DS within pores of the polyHIPE was studied. The results showed that the microstructure of the polyHIPE was significantly influenced by the ethanol content. The increase of ethanol in the HIPE increased the internal pore diameter and decreased the pore volume of the polyHIPE, thus decreased the DS absorption and increased the release rate. The DS monomer can enter the pores(cavities, windows) and fill the original holes after the polymerization. Compared with conventional polymerization of DCPD/St, the poly(DCPD/St) (pDS) obtained from confined spaces possess higher molecular weight, broader molecular weight distribution, and higher T_g. As the pore diameter increased, the effect of space confinement reduced, and the performances of pDS were closed to that prepared by conventional polymerization.

• Periodical: Materials Science Forum (Volume 815)
• Pages: 562-567
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.815.562
• Online since: March 2015
• Authors: Wang Fa Xu, Fa Meng Sun, Jing Bo Liu, Xiao Fang Li, Fa Ai Zhang*
• Keywords: Confined Space, DCPD/St, Free Radical Polymerization, Polymerized High Internal Phase Emulsions (polyHIPE)

References

[1] K. J. Lissant, K. G. Mayhan, A study of medium and high internal phase ratio water/polymer emulsions，J. Colloid Interface Sci., 42 (1973) 201-208.

DOI: 10.1016/0021-9797(73)90025-8

[2] L. C. {Wong, 2011 #66} Wong, P. M. Baiz Villafranca, A. Menner, et al. Hierarchical Polymerized High Internal Phase Emulsions Synthesized from Surfactant-Stabilized Emulsion Templates. Langmuir, 29(2013) 5952-5961.

DOI: 10.1021/la3047643

[3] S. Kovačič, N. B. Matsko, K. Jerabek, et al. On the mechanical properties of HIPE templated macroporous poly (dicyclopentadiene) prepared with low surfactant amounts, J. Mater. Chem. A., 1(2013) 487-490.

DOI: 10.1039/c2ta00546h

[4] L. C. Wong, V. O. Ikem, A. Menner et al. Macroporous polymers with hierarchical pore structure from emulsion templates stabilised by both particles and surfactants, Macromol. Rapid Commun., 32(2011) 1563-1568.

DOI: 10.1002/marc.201100382

[5] D. Mao, T. Li, H. Liu, et al. Preparation of macroporous polyHIPE foams via radiation-induced polymerization at room temperature, Colloid ＆ Polym. Sci., 291(2013) 1649-1656.

DOI: 10.1007/s00396-013-2899-8

[6] N. R. Cameron, D. C. Sherrington, L. Albiston et al. Study of the formation of the open-cellular morphology of poly (styrene/divinylbenzene) polyHIPE materials by cryo-SEM, Colloid Polym. Sci., 274(1996) 592-595.

DOI: 10.1007/bf00655236

[7] Z. Yao, L. Zhou, B. Dai, et al, Ring‐opening metathesis copolymerization of dicyclopentadiene and cyclopentene through reaction injection molding process, J. Appl. Polym. Sci., 125 (2012) 2489-2493.

DOI: 10.1002/app.36359

[8] B. J. Blaiszik, M. Baginska, S. R. White, et al, Autonomic recovery of fiber/matrix interfacial bond strength in a model composite Adv. Funct. Mater., 20(2010) 3547-3554.

DOI: 10.1002/adfm.201000798

[9] J. D. Rule, N. R. Sottos, S. R. White, Effect of microcapsule size on the performance of self-healing polymers, Polymer, 48(2007) 3520-3529.

DOI: 10.1016/j.polymer.2007.04.008

[10] J. Q. Chen, J. M. Xie. Study on Copolymerization of Dicyclopentadiene an Styrene, Technology & economics in petrochemicals, 27. 3 (2011) 31-34.

[11] W. F. Xu, R. Bai, F. A. Zhang. Effects of internal-phase contents on porous polymers prepared by a high-internal-phase emulsion method, J. Polym. Res., 21(2014) 524-532.

DOI: 10.1007/s10965-014-0524-2