Amorphous polymer granules

Amorphous-Amorphous Phase Separation in API/Polymer Formulations.

The long-term stability of pharmaceutical formulations of poorly-soluble drugs in polymers determines their bioavailability and therapeutic applicability. However, these formulations do not only often tend to crystallize during storage, but also tend to undergo unwanted amorphous-amorphous phase separations (APS). Whereas the crystallization behavior of APIs in polymers has been measured and mo...

Elastic Moduli of Ultrathin Amorphous Polymer Films

The elastic moduli of ultrathin poly(styrene) (PS) and poly(methylmethacrylate) (PMMA) films of thickness ranging from 200 nm to 5 nm were investigated using a buckling-based metrology. Below 40 nm, the apparent modulus of the PS and PMMA films decreases dramatically, with an order of magnitude decrease compared to bulk values for the thinnest films measured. We can account for the observed dec...

Optimization of Amorphous Silicon Solar Cells on Polymer Film Substrates

In this paper the authors present the results of different investigations concerning the development of a-Si:H solar cells on plastic film substrates. More precisely, this paper will discuss a) the evaluation and test of different polymer films as a suitable material for a-Si:H solar cell deposition, b) the optimisation of inverted n-i-p solar cells, and c) texturation of the plastic films by O...

Conducting Polymer and Hydrogenated Amorphous Silicon Hybrid Solar Cells

Comparative surface dynamics of amorphous and semicrystalline polymer films.

The surface dynamics of amorphous and semicrystalline polymer films have been measured using helium atom scattering. Time-of-flight data were collected to resolve the elastic and inelastic scattering components in the diffuse scattering of neutral helium atoms from the surface of a thin poly(ethylene terephthalate) film. Debye-Waller attenuation was observed for both the amorphous and semicryst...