B9 action

B9: Advanced polymer characterization and biodegradation tests

This action was extended for the entire project because it played a support role for all technical activities.

The implemented activities, as support for the technical action B1, B2, B3, was both on the 1H and 13C NMR spectroscopic characterization and on thermal analyses by using differential scanning calorimeter (DSC), thermogravimetric analysis (TGA).

The rheological methods by using rotational rheometers both with coaxial cylinders and oscillating plate-plate were applied to determine the dynamic viscosity (in mPas) for the preparation of the reactive mixtures (activity B6, B7 an B8).

The thermo-mechanical analyses by using Heat Distortion temperature (HDT), impact resistance, Dynamical Mechanical Analysis (DMA), tensile and flexural methods were applied on the several samples prepared for the action B4 and B5. In addition, some adhesion tests were applied to determine the adhesion strength of the IA-based monomers and unsaturated polyesters mixtures used as thermo- and UV curable adhesives  (action B6, B8) and as hot melt adhesives (action B4).

In particular, many studies were successfully applied to demonstrate that the IA-based unsaturated polyesters are branched polymers, since the double bonds in the macromolecular chains disappear for the addition reaction of the hydroxyl groups in the chain ends. This result was of great importance to explain the low reactivity of the IA-based unsaturated polyesters as observed during UV- and thermal-curing reactions. The isolated fractions by semipreparative size exclusion chromatografy were analysed with Matrix-Assisted Laser Desorption/Ionization technique (MALDI).

A concomitant technical action for the setting up of the apparatus for the biodegradation tests were achieved as described in European regulation EN13432.

The IA based monomers synthesized for the technical action B1, B2 and B3 and used for the preparation of thermo- and Uv-curable mixtures for the actions B5, B6, B7 and B8 successfully passed the biodegradation test under the experimental conditions defined by EN1342. After the biodegradation tests, the compost was diluted with 50% by weight a commercial available fertilizer.

advanced polymer materials