Temperature Dependence of PHB Hole Profiles in Polymer Matrices

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Abstract
The temperature dependences of irreversible hole decay for tetraphenylporphines / polymers as guest / host systems were investigated. The irreversible hole decay values depend on the chemical structure of matrix polymers. Irreversible hole decay is caused by the motion of polymer side chains or backbones of poly(alkyl methacrylate)s and polyethylene. Excellent hole retention is observed in the PMMA matrix, and is explained by the small, symmetrical structure of methyl groups. PnDMA shows hole decay profiles similar to those of PE. This result indicates that PnDMA forms microstructures that are similar to PE microstructures because of long methylene side chains.

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