{'fraction_non_alphanumeric': 0.022700119474313024, 'fraction_numerical': 0.0, 'mean_word_length': 5.5984251968503935, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
The effects of differently prepared electrodes of samples on the measured values of electric properties of polymeric materials

The effects of charge transfer and trapping at the interfaces of metal electrodes and polymeric materials should be considered when the electric properties of polymers are to be studied. The free charges injected into polymers from metal electrodes will be trapped at the interfaces, thus forming a homopolar space - charge layer. We have investigated the electric properties of polyimide (PI), polystyrene(PS) and poly(methyl methacrylates) (PMMA) and found that the samples with different electrodes, such as block, liquid and evaporated, have different space charge layers, which can directly affect the measured values of electric properties of polymers, such as interface charge trapping and resistivity.