Local intramolecular mobility in linear polyesters simulating the structure of thermotropic polymers

Molecular Mobility of Molecular Brushes With a Polyimide Backbone and Polymethylmethacrylate Side Chains of Different Lengths

“…3 for the low-temperature relaxation region are close to those for the β-process observed in linear polyesters and PIs of various structures and caused by local motions of polar groups bound to phenyl rings and imide cycles [12][13][14][15] or conformational polymorphism of aromatic PIs. [16] It may be supposed that the low-temperatures process (hereafter referred to as the β-process) in the glassy state of the molecular brushes M1-M3 was caused by rearrangements of ether and imide groups bound to phenyl rings and imide cycles of the PI backbone.…”

Dielectric Spectroscopy and Low Temperature Molecular Dynamics of Thermotropic Side-Chain Polymethacrylates with Side Halogen Terminal Groups

“…[3 -5] The investigation of molecular mobility in liquid crystalline side-chain polymers (LCSC's) with different structures shows that the existence of local forms of molecular mobility within mesogenic fragments below T g favors LC phase formation. [6] In the present work a series of LC side-chain halogencontaining polymers (P-Hal) with caproyloxyphenyl benzoate mesogens was studied by dielectric techniques below T g temperatures. Molecular mobility at temperatures higher than T g has already been investigated.…”