Weighting functions sensitivity enhancement

Figure 2-7 Weighting functions. (a) Sensitivity enhancement. (b) Resolution enhancement.

Many other weighting functions have been used for sensitivity enhancement and resolution enhancement. Perhaps the most popular are the sine bell are variants on it, which are illustrated in Fig. 4.13. 

It is apparent that the magnitude of the enhancement in the UCFT above the 0i -temperature was a sensitive function of the molecular weight of the polymer, at least for low molecular weight polymers. The enhancement increased with decreasing molecular weight of the stabilizing moieties. 

Polymerization of the oxiranes is typically propagated from a starter molecule that is chosen to define the functionality if) of the final polyol. The functionality and the molecular weight of polyols are the main design features that define the polyurethane properties in the end-use applications. Additionally, the balance of EO and PO in the polyether polyols, mainly for flexible foam polyols, is tailored to enhance the compatibility of formulations and the processability of the foam products. The exact composition of the polyols defines the crucial performance features of the final polyurethane product. Even seemingly small differences in polyol composition can result in changes to polyol processabihty and polyurethane performance. This becomes a crucial issue when replacing conventional petrochemical polyols with polyols from different feedstocks. To demonstrate the sensitivity of commercial formulations to changes in feedstocks, a simple example is offered below. 

---