Electrophotographic photosensitive member, process cartridge, and electrophotographic image forming apparatus

A process cartridge comprising:

• 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,
• the process cartridge integrally supporting the electrophotographic photosensitive member and the at least one unit, and being removably mounted onto a main body of an electrophotographic image forming apparatus,
• wherein the electrophotographic photosensitive member comprises a support and a photosensitive layer arranged on the support,
• wherein an outermost surface layer of the electrophotographic photosensitive member comprises a polymerized product obtained by polymerization of a composition comprising a polyrotaxane and a monomer having (meth)acryloyloxy groups, and
• wherein of the polyrotaxane comprises chain molecules and cyclic molecules,
• the chain molecules each have two blocking groups at both terminals thereof,
• the cyclic molecules each have (meth)acryloyloxy groups,
• the monomer is represented by the formula (M-2):
• and
• the polymerized product comprises a crosslinked polyrotaxane obtained by forming a bond between the (meth)acryloyloxy groups in the cyclic molecules of the polyrotaxane and the (meth)acryloyloxy groups in the monomer.

An electrophotographic image forming apparatus comprising:

• an electrophotographic photosensitive member;
• and
• at least one unit selected from the group consisting of a charging unit, an exposing unit, a developing unit, and a transferring unit,
• wherein the electrophotographic photosensitive member comprises a support and a photosensitive layer arranged on the support,
• wherein an outermost surface layer of the electrophotographic photosensitive member comprises a polymerized product obtained by polymerization of a composition comprising a polyrotaxane and a monomer having (meth)acryloyloxy groups,
• the monomer is represented by the formula (M-2):
• and
• wherein the polyrotaxane comprises chain molecules and cyclic molecules,
• the chain molecules each has two blocking groups at both terminals thereof,
• the cyclic molecules each has (meth)acryloyloxy groups, and
• the polymerized product comprises a crosslinked polyrotaxane obtained by forming a bond between the (meth)acryloyloxy groups in the cyclic molecules of the polyrotaxane and the (meth)acryloyloxy groups in the monomer.