Epitaxial crystallization of isotactic poly(methyl methacrylate) on highly oriented polymers

Article Abstract:

The annealing behavior of amorphous isotactic poly(methyl methacryalte)(i-PMMA) thin films on highly oriented high-density polyethylene (HDPE) substrates was studied by transmission infrared spectroscopy and electron diffraction. The i-PMMA thin film on highly oriented HDPE exhibits a much faster crystallization rate than usual, providing not only a good method for the preparation of crystalline i-PMMA thin and ultrathin film, but also the convenience to observe the crystallization process by infrared spectroscopy in situ.

Analysis, Annealing

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Initial crystallization mechanism of isotactic polystyrene from different states

Article Abstract:

The isothermal crystallization processes of isotactic polystyrene at 160 degree Celsius from different initial states, that is, cold- and melt-crystallization processes are investigated by infrared (IR) and generalized two-dimensional IR correlation spectroscopy. It is concluded that the physical origins for spinodal decomposition prior to polymer crystallization may be different for different crystallization processes.

Science & research, Plastics Material and Resin Manufacturing, Plastics materials and resins, Polystyrene, Styrene Resins, Polystyrene Resins NEC, Research, Polymers, Crystallization

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Spin-coated polyethylene films probed by single molecules

Article Abstract:

Ultrathin spin-coated high-density polyethylene films by means of single-molecule spectroscopy and microscopy at 1.8 K is studied. Results reveal a preferential orientation of dopant molecules along two well-defined, mutually perpendicular directions.

Usage, Molecular spectroscopy

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