Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus

An electrophotographic photosensitive member comprising:

• a surface layer comprising a polyarylate and a polycarbonate,
• wherein, in a component analysis of a polymer component collected from the surface layer,
• the polyarylate
• has a peak for which TIC has an MS spectrum where components with m/z=242 and m/z=227 are detected in pyrolysis gas chromatography-mass spectrometry under the coexistence of TMAH and
• has peaks at 2.40±0.02 ppm and 2.35±0.02 ppm in a 1H-NMR spectrum for which heavy chloroform is used, and
• the polycarbonate
• has a peak for which TIC has an MS spectrum where components with m/z=242 and m/z=227 are detected in pyrolysis gas chromatography-mass spectrometry under the coexistence of TMAH and
• has a peak at 2.40±0.02 ppm in a 1H-NMR spectrum for which heavy chloroform is used.

A process cartridge that integrally supports an electrophotographic photosensitive member and at least one unit selected from the group consisting of a charging unit, a developing unit and a cleaning unit and is detachably attachable to a main body of an electrophotographic apparatus, wherein the electrophotographic photosensitive member has a surface layer comprising a polyarylate and a polycarbonate,

• wherein in a component analysis of a polymer component collected from the surface layer,
• the polyarylate
• has a peak for which TIC has an MS spectrum where components with m/z=242 and m/z=227 are detected in pyrolysis gas chromatography-mass spectrometry under the coexistence of TMAH and
• has peaks at 2.40±0.02 ppm and 2.35±0.02 ppm in a 1H-NMR spectrum for which heavy chloroform is used, and
• the polycarbonate
• has a peak for which TIC has an MS spectrum where components with m/z=242 and m/z=227 are detected in pyrolysis gas chromatography-mass spectrometry under the coexistence of TMAH and
• has a peak at 2.40±0.02 ppm in a 1H-NMR spectrum for which heavy chloroform is used.

An electrophotographic apparatus comprising:

• an electrophotographic photosensitive member;
• a charging unit;
• an exposure unit;
• a developing unit;
• and
• a transfer unit,
• wherein the electrophotographic photosensitive member has a surface layer comprising a polyarylate and a polycarbonate,
• wherein the polyarylate has at least one structural unit selected from the group consisting of a structural unit represented by the following formula (1-1), a structural unit represented by the following formula (1-2) and a structural unit represented by the following formula (1-3), and
• wherein the polycarbonate has a structural unit represented by the following formula (2-1),

An electrophotographic apparatus comprising:

• an electrophotographic photosensitive member;
• a charging unit;
• an exposure unit;
• a developing unit;
• and
• a transfer unit,
• wherein the electrophotographic photosensitive member has a surface layer comprising a polyarylate and a polycarbonate,
• wherein in a component analysis of a polymer component collected from the surface layer,
• the polyarylate
• has a peak for which TIC has an MS spectrum where components with m/z=242 and m/z=227 are detected in pyrolysis gas chromatography-mass spectrometry under the coexistence of TMAH and
• has peaks at 2.40±0.02 ppm and 2.35±0.02 ppm in a 1H-NMR spectrum for which heavy chloroform is used, and
• the polycarbonate
• has a peak for which TIC has an MS spectrum where components with m/z=242 and m/z=227 are detected in pyrolysis gas chromatography-mass spectrometry under the coexistence of TMAH and
• has a peak at 2.40±0.02 ppm in a 1H-NMR spectrum for which heavy chloroform is used.