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In this report, we merge block copolymers with vitrimers in an effort to realize the prospect of higher-order, nanoscale control over associative crosslink exchange and flow. We show the use of controlled polymerization as a vital tool to understand fundamental structure-property effects through the precise control of polymer architecture and molecular weight. Vitrimers derived from self-assembling block copolymers exhibit superior resistance to macroscopic deformation in comparison to their analogs generated from statistical copolymers. Our results suggest the enhanced creep resistance achieved by control over chain topology in block vitrimers can be used to tune viscoelastic properties. The macroscopic resistance to deformation that arises from a microphase-separated network structure in this new class of materials differentiates block vitrimers to their statistical counterparts and introduces the potential of topology-control over viscoelastic flow.
This article was published in the following journal.
Name: Journal of the American Chemical Society
A novel ABA-type polyethylene glycol (PEG)-b-polyketal (PK)-b-PEG block copolymer was synthesized via click reactions between the monoazido-monomethoxy-PEG and dialkyne terminated aliphatic polyketal ...
A hierarchically assembled necklace composed of amphiphilic diblock copolymer micelles is exquisitely produced by capitalizing on two concurrent self-assembly processes at different scales (i.e., "bre...
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The defined assembly of nanoparticles (NPs) in polymer matrices is an important prerequisite for next-generation functional materials. A promising approach to control NP positions in polymer matrices ...
The purpose of this study is to compare adhesion prophylaxis with polylactide-caprolactone-trimethylenecarbonate copolymer to icodextrin 4% in terms of safety, side effects and usability i...
OBJECTIVES: I. Compare tolerance to and therapeutic impact of copolymer 1, a mixture of synthetic polypeptides, with placebo in patients with relapsing-remitting multiple sclerosis.
Cataract is the leading cause of vision loss and blindness in the world,surgery is the only available option to correct the problem and the major reasons for low cataract surgical rates in...
This is a single center, double blinded, randomized, controlled trial. Qualified subjects will be enrolled and randomized to either one of the two study groups: a) using 0.3% triclosan/cop...
This study aim to compare the efficiency and the analgesic effect of Erector Spinal Plane Block versus TAP Block after laparoscopic cholecystectomy.
Copolymer of divinyl ether and maleic anhydride that acts as an immunostimulant with antineoplastic and anti-infective properties. It is used in combination with other antineoplastic agents.
Interruption of sympathetic pathways, by local injection of an anesthetic agent, at any of four levels: peripheral nerve block, sympathetic ganglion block, extradural block, and subarachnoid block.
Impaired conduction of cardiac impulse that can occur anywhere along the conduction pathway, such as between the SINOATRIAL NODE and the right atrium (SA block) or between atria and ventricles (AV block). Heart blocks can be classified by the duration, frequency, or completeness of conduction block. Reversibility depends on the degree of structural or functional defects.
A copolymer of polyethylene and polypropylene ether glycol. It is a non-ionic polyol surface-active agent used medically as a fecal softener and in cattle for prevention of bloat.
Impaired or delayed impulse conduction between the right and left HEART ATRIA. Advanced interatrial blocks are often associated with arrhythmias (e.g., ATRIAL FLUTTER; and ATRIAL FIBRILLATION), direct conduction block via the Bachmann's bundle and concomitant left atrial enlargement. Syndrome of advanced interatrial block associated with SUPRAVENTRICULAR TACHYCARDIA is referred to as Bayes syndrome.