1. State Key Laboratory of Molecular Engineering of PolymersDepartment of Macromolecular ScienceLaboratory for Advanced MaterialsFudan University Shanghai 200433 China
2. State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of ChemistryChemical Engineering and BiotechnologyCenter for Advanced Low‐Dimension MaterialsDonghua University Shanghai 201620 China
3. Jülich Centre for Neutron Science (JCNS) at Heinz Maier‐Leibnitz Zentrum (MLZ) Forschungszentrum Jülich Lichtenbergstr. 1 85748 Garching Germany