Chain architecture and flexibility of α-cyclodextrin/PEG polyrotaxanes in dilute solutions

Mechanically interlocked polymers based on rotaxanes

“…It is speculated that the intermolecular attractive hydrogen bonding leads to higher rigidity of polyrotaxanes, behaving a strong thixotropic viscosity in dimethylsulfoxide (DMSO). 131 Small-angle X-ray scattering (SAXS) 132 and small-angle neutron scattering (SANS) 133 experiments on dilute solutions of polyrotaxanes have also shown that threading CDs in PEG change the conformation of the polymer chain from a Gaussian to a rodlike chain. For the further determination of the relationship between intramolecular conformations and rheological behaviors, the CDs were hydroxypropylated to weaken the hydrogen bonds between CDs, dispersing rings on the PEG chain.…”

Lasting high surface energy co‐polyester ionomer and its application in laminated tin‐free steel

“…Besides, when compared to PET, PEST, and PEPST, PEPST shows the highest nucleation density. This is due to the flexibility chain of PEG . The internal rotation schematic of PEPST molecular chain is shown in Figure .…”

“…This is due to the flexibility chain of PEG. [26][27][28] The internal rotation schematic of PEPST molecular chain is shown in Figure 6. As shown there are many ACH 2 CH 2 OCH 2 CH 2 A segments in PEPST molecular chain.…”

Design of a Well-Defined Polyrotaxane Structure on a Glassy Polymer Surface

“…13−15 While PEO strings have a flexible conformation in a liquid phase, the threading of CD molecules stretched the PEO chains and increased the persistence length of PEO. 13,14 This resulted in the slowing down of the local dynamics of the PEO chains. 15 Also, the threading behavior of CD molecules onto the PEO chains grafted on solid substrates 16,17 and particles, 18 and also bioapplications based on polyrotaxane grafted chains, 19−22 However, it is not yet clear how a well-defined polyrotaxane surface affects the bioresponse for a polymer film.…”

“…An inclusion complex of a polymer chain with cyclic compounds, generally referred to as polyrotaxane, in which cyclic molecules are threaded onto a chain capped with a bulky compound at the end portion, has attracted a great deal of attention due to inherent scientific interest as well as its great potential for functional materials. − So far, the structure and dynamics of the inclusion complex composed of poly­(ethylene oxide) (PEO) and cyclodextrin (CD) have been studied in a diluted solution state. − While PEO strings have a flexible conformation in a liquid phase, the threading of CD molecules stretched the PEO chains and increased the persistence length of PEO. , This resulted in the slowing down of the local dynamics of the PEO chains . Also, the threading behavior of CD molecules onto the PEO chains grafted on solid substrates , and particles, and also bioapplications based on polyrotaxane grafted chains, − have been reported.…”