Abteilungen und Gruppen > Reaktive Verarbeitung > Publikationen

Publikationen

John, A. ; Nagel, J. ; Heinrich, G.
Compatibilization in two-component injection molding by means of split type reactions exhibiting differently located reactive sites - a Monte Carlo simulation study

Adhesion of immiscible polymers during two-component injection molding may be improved by transreactions of properly functionalized molecules in situ using the thermal energy of the melts. These reactions must provide a sufficient conversion of reactive monomers during the short cooling time down to the glass temperature and within the small spatial region of the interface width to create as much as possible interconnecting chemical links between the components on the molecular level. To investigate these processes, we performed Monte-Carlo (MC) simulations based on the three dimensional coarse-grained Bond Fluctuation Model (BFM) in a two-phase system. We studied split type reactions exhibiting reactive monomers at different sites (End, Middle, Random) of the polymers governed by activation energies of EA = 0, 1, 3, 5 and 7 kB T . For the reacting systems several physical properties like consumption, radius of gyration, concentration profiles or the distribution of the degree of polymerization were calculated as a function of time. Additionally, different functions for the description of adhesion on the molecular level were adopted and calculated depending on reaction type, activation energy and degree of consumption. From the results those chemical reaction types were deduced, which should be most suitable for the compatibilization in two-component injection molding.

Quelle
The Open Macromolecules Journal 5

Seiten
1-12

DOI
http://dx.doi.org/10.2174/1874343901105010001

Erschienen am
March 2011
 
Publications
Publikationen

Abteilungen und Gruppen

Reaktive Verarbeitung

News