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Linear low density polyethylene (LLDPE) can suffer from melt extrusion defects including sharkskin, cyclic melt fracture, and gross melt fracture during processing. Arborescent polymers are dendritic macromolecules with characteristics, such as a compact structure and a rigid spherical topology, making them potentially useful as polymer processing additives (PPA) to alleviate melt extrusion defects...
The ability of the Fluorescence Blob Model (FBM) to probe the chain dynamics of a polymer backbone was verified for the first time by investigating whether it responds to known differences in backbone flexibility for flexible cis-polyisoprene (PIP) and more sterically hindered polystyrene (PS), both randomly labeled with pyrene. For comparable pyrene contents, the steady-state fluorescence spectra...
Dendrigraft polymers are a class of highly branched macromolecules belonging to the dendritic polymer family. Multiple branching levels characterize the architecture of these molecules, in analogy to dendrimers and hyperbranched polymers. The size of dendrigraft polymers is typically 1–2 orders of magnitude larger than for their dendritic counterparts, however, ranging from around 10 nm to a few hundred...
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