نتایج جستجو برای: polyolefins
تعداد نتایج: 352 فیلتر نتایج به سال:
Polyethylene and polypropylene plant owners have experienced a volatile business environment in recent years. Prices have fluctuated dramatically and operating margins have echoed this volatility. For many plants, the number of different polymer grades produced has increased and customers have become more demanding with respect to product quality. Developments in advanced automation and informa...
Processes on different length scales affect the dynamics of chain molecules. In this work, we focus on structures on the scale of a monomer and investigate polyolefins, i.e., hydrocarbon chains with different small-scale architectures. We present an exact enumeration scheme for the simulation of interactions and relative motion of two short chain sections on a lattice and employ it to deduce th...
Nanoparticles of precisely branched polyethylenes possess a distinct oblate shape resulting from a crystalline lamella in the particle as revealed by SAXS and TEM, and display controllable and well-behaved thermal behaviour.
We examined three united atom models in light of their description of polyolefin dynamics and investigated the relative influence of various potentials on the resulting dynamics. Results were compared with a collection of experimental data on polyethylene, poly(ethylene-alt-propylene), polypropylene, and head-to-head polypropylene, including quasielastic neutron scattering measurements that we ...
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