Modified epoxy networks, synthesis

Fig. 2. Two-step synthesis of siloxane-modified epoxy network. First step, capping of siloxane oligomer with Epon 828. Second step, crosslinking of Epon 828 and capped siloxane with PACM-20...

Hed Hedrick, J. L., Yilgor, I., Jurek, M., Hedrick. J. C., Wilkes, G. L., McGrath, J. E. Chemical modification of matrix resin networks with engineering thermoplastics 1. Synthesis, morphology, physical behaviour and toughening mechanisms of poly (arylene ether sulfone) modified epoxy networks. Polymer 32 (1991) 2020-2032. 

Riffle, J. S. Yilgor, I. Tran, C. Wilkes, G. L. Mcgrath, J. E. Bantia, A. K. Elastomeric Polysiloxane Modifiers for Epoxy Networks. Synthesis of Functional Oligomers and Network Formation Studies Epoxy Resin Chemistry II , ACS Symp. Sen, 1983, ,2i,... 

Riffle JS, Yilgor I, Tran C et al (1983) Elastomeric polysiloxane modifiers for epoxy network -synthesis of fimctional oligomers and network formation studies. ACS Symp Ser 221 21-54 Risse S, Kussmaul B, BCriiger H et al (2012) Synergistic improvement of actuation properties with compatibilized high permittivity filler. Adv Funct Mater 22 3958-3962 Romasanta LJ, Leret P, Casaban L et al (2012) Towards materials with enhanced electro-meehanical response CaCu3Ti40i2-polydimethylsiloxane composites. J Mater Chem 22 24705-24712 Rosset S, Shea HR (2013) Flexible and stretchable electrodes for dielectric elastomer actuators. Appl Phys A Mater Sci Proeess 110 281-307... 

Liu WP, Hoa SV et al (2004) Morphology and performance of epoxy nanocomposites modified with organoclay and rubber. Polym Eng Sd 44 1178 Lu KL, Lago RM et al (1996) Mechanical damage of carbon nanotubes by ultrasound. Carbon 34 814 Martin CA, Sandler JKW et al (2005) Electric field-induced aligned multi-wall carbon nanotube networks in epoxy composites. Polymer 46 877 Messersmith PB, Giannelis EP (1994) Synthesis and characterisation of layered sEicate-epoxy nanocomposites. Chem Mater 6 1719... 

For equilibration processes, one must synthesize both oligomers and what are termed dimers, or disiloxanes. Our primary interest is in the utilization of these functional oligomers for the synthesis of both linear block or segmented copolymers, and also surface modified, oughened networks such as the epoxy and imide systems (3-27). The generalized structure of the oligomers of interest is shown in Scheme 1. 

This chapter is meant to be an overview of ongoing studies of polysiloxane-modified epoxy resins. Because this research area is still quite young, it is not yet possible to write a standard review article. Presented here is the current status of a collaborative effort encompassing chemistry and synthesis of the modified networks, their morphology, their mechanical properties, and their friction and wear behavior. The earliest work in the synthesis and characterization of siloxane-modified networks was done by Riffle et al. 15). More recent research in the area of chemistry and synthesis has been carried out by Tran 17). 

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