Microcellular polymers

Park CB, Baldwin DF, Suh NP (1995) Effect of the pressure drip rate on cell nucleation in continuous processing of microcellular polymers. Polym Eng Sci 35 432—440... 

S. Gong, L.-S Turng, C.B. Park, and L. Liao, "Microcellular Polymer Nanocomposites for Packaging and Other Applications", in A. Mohanty, M. Misra and H.S. Nalwa, eds., Packaging Nanotechnology, American Scientific Publishers, 2008. 

Akay, G. Dawnes, S. Price, V.J Microcellular Polymers as Cell Growth Media and Novel Polymers European Patent 1,183,328, Jun 3, 2002. 

Plasticization of glassy polymers induced by CO2 plays an important role in the process of foaming of glassy polymers. The preparation of polymeric foams is aimed at the production of microcellular polymers that have closed cells about 10 pm or less in diameter and cell density of about 10 cells/cm. Such foamed polymeric materials have applications in many areas including biomedical devices. Pioneering work by Skripov and coworkers (54,55) stimulated the original interest in this field. 

Mioreva. [SP CLtd.] Microcellular polymers EVA/PE and specialized masterbatches. 

Akay G., Dawnes S., Price V.J. 2002. Microcellular polymers as cell growth media and novel polymers, European Patent, EP 1 183 328. 

Byron V.J. 2000. The development of microcellular polymers as support for tissue engineering, PhD Thesis, University of Newcastle, Newcastle upon Tyne, UK. 

Microcellular polymers produced by gas nucleation, refer to closed cell thermoplastic foams with a very large number of very small cells (of the order of 10 mm in diameter), typically 10 or more cells per cm. Microcellular thermoplastics have been obtained from a number of different polymers, ranging in relative density from 0.1 to 1.0 kg/m, containing 10 to 10 cells per cm, offering a new range of properties for design [6, 7]. For example microcellular PU foams can be obtained via polymerisation in carbon dioxide [8, 9]. 

Microcellular polymers are closed cell thermoplastics produced by gas nucleation. They have a high number of very small cells with a diameter of 10 pm, and bubble densities in excess of 100 million per cm. First produced in the early 1980s with the objective of reducing the amount of polymer used in mass produced items, these novel materials have the potential to revolutionise the way thermoplastic polymers are used today. PVC, PS, polycarbonate (PC), polyethylene terephthalate (PET) and not only these polymers can be applied for such kinds of products. As no harmful chemicals are used in the microcellular technology, it is likely that these new products will replace many types of foam now produced by processes that damage the environment [59]. 

C. B. Park,The role of polymer/gas solutions in continuous processing of microcellular polymers, Ph.D. thesis. Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 1993. 

Shen B., Zhai W., Lu, D., Zheng W., and Yan Q., Fabrication of microcellular polymer/ graphene nanocomposite foams. Polymer International 2012, 61, 1693-1702. 

Bl dzki, A. K., Faruk, O., KirschHng, H., Kuhn, J., and Jaszkiewicz, A. 2006. Types of foaming agents and technologies of microcellular processing. Microcellular Polymers and Composites Part 751 696-703. 

As in the case of urethane elastomers and microcellular polymers, the isocyanates used are generally TDI, MDI, and the liquid MDIs (22), which have been described above. Blends of these isocyanates have also been used. 

Dai X, Liu Z, Wang Y, Yang G, Xu J, Han B. High damping property of microcellular polymer prepared by friendly environmental approach. J Supercrit Fluids 2005 33 259-67. 

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