The present disclosure provides cyclic silyl ethers of the formula: ##STR00001##
and salts thereof. The cyclic silyl ethers may be useful as monomers for preparing polymers. Also described herein are polymers prepared by polymerizing a cyclic silyl ether and optionally one or more additional monomers. The polymers may be degradable (e.g., biodegradable). One or more OSi bonds of the polymers may be the degradation sites. Also described herein are compositions and kits including the cyclic silyl ethers or polymers; methods of preparing the polymers; and methods of using the polymers, compositions, and kits.

A process for purifying semiconducting single-walled carbon nanotubes (sc-SWCNTs) extracted with a conjugated polymer, the process comprising exchanging the conjugated polymer with an s-tetrazine based polymer in a processed sc-SWCNT dispersion that comprises the conjugated polymer associated with the sc-SWCNTs. The process can be used for production of thin film transistors and chemical sensors. In addition, disclosed herein is use of an s-tetrazine based polymer for purification of semiconducting single-walled carbon nanotubes (sc-SWCNTs).

The present invention relates to a polymer, composition, the forming of a sacrificial layer and a method for producing a semiconductor device comprising a step during which a pattern is made using a photoresist by the photolithography method.

The present disclosure describes functional oligomers or functional polymers. The functional oligomers or functional polymers may contain functional groups, e.g., OH and/or CHO. The functional oligomers or functional polymers may be obtained from hydrolyzing certain copolymers and may be soluble in commercially available solvents. The copolymers may be thermosetting polymers. The functional oligomers and functional polymers may be useful for recycling thermosetting polymers and may be useful as starting materials for preparing additional oligomers or polymers.

A polymer comprising at least one unit of the formula (1) wherein T.sup.1 is a carbon atom or a nitrogen atom, T.sup.2 is a carbon atom if T.sup.1 is a nitrogen atom, or is a nitrogen atom if T.sup.1 is a carbon atom, r is 1, 2, 3 or 4, s is 1, 2, 3, or 4, M.sup.1 is preferably selected from the group consisting of M.sup.2 is preferably The polymers are prepared by reacting monomers (1a) with monomers (2a) H.sub.2N-[-M.sup.1-]r-NH.sub.2 (1a) OHC-[-M.sup.2-]s-CHO (2a) or the step of reacting monomers (1b) with monomers (2b) OHC-[-M.sup.1-]r-CHO (1b) H.sub.2N-[-M.sup.2-]s-NH.sub.2 (2b).

##STR00001##

The present disclosure provides cyclic silyl ethers of the formula:

##STR00001##

and salts thereof. The cyclic silyl ethers may be useful as monomers for preparing polymers. Also described herein are polymers prepared by polymerizing a cyclic silyl ether and optionally one or more additional monomers. The polymers may be degradable (e.g., biodegradable). One or more OSi bonds of the polymers may be the degradation sites. Also described herein are compositions and kits including the cyclic silyl ethers or polymers; methods of preparing the polymers; and methods of using the polymers, compositions, and kits.

A process for purifying semiconducting single-walled carbon nanotubes (sc-SWCNTs) extracted with a conjugated polymer, the process comprising exchanging the conjugated polymer with an s-tetrazine based polymer in a processed sc-SWCNT dispersion that comprises the conjugated polymer associated with the sc-SWCNTs. The process can be used for production of thin film transistors and chemical sensors. In addition, disclosed herein is use of an s-tetrazine based polymer for purification of semiconducting single-walled carbon nanotubes (sc-SWCNTs).

Synthetic methods for forming a crosslinked polymer network with dynamic bonds within its crosslinks from a pre-existing unsaturated organic polymer are provided. The dynamic bonds enable the resulting crosslinked polymer network to be chemically or mechanically recycled or otherwise reprocessed. Also provided are crosslinked polymer networks made using the synthetic methods and methods for reprocessing the crosslinked polymer networks using thiol exchange reactions.

Provided herein are depolymerizable thermally activated delayed fluorescence polymers with exceptional light-emitting properties and programmable depolymerization under specific stressors.

The invention relates to the use polymers obtained by polymerization of ethylenically unsaturated acids or anhydrides onto unsaturation-containing polyether polyols for producing polyol dispersions by acidolysis of polyurethane waste, as well as to the use of the resulting polyol dispersions for producing polyurethanes.