Various embodiments disclosed relate to a method of forming a polypeptide. The method includes contacting a first amino acid-derived N-thiocarboxyanhydrosulfide monomer as a crystalline solid with a polymerization initiator (e.g., in an alkane suspension) to give a polypeptide product. The method further includes contacting the polypeptide product with a second amino acid-derived N-thiocarboxyanhydrosulfide monomer in an alkane suspension.

A functional polymer including at least two different types of side chains, having the general formula (1), ##STR00001##
wherein A is an at least monosubstituted alkylene or arylene group; B is an amide, ester or ether group and n is 0 or 1; F is selected from: an ester, secondary amine, amide, ether, thio ether, thio ester, and may be the same or different for the different side chains; D is a side chain intended to reversible bind to a substrate or has a coating function; E is a side chain intended to irreversible bind to a substrate, the side chain E and polymer includes 1 to 10 different side chains D and 1 to 10 different side chains E, but at least one of each, and includes a plurality of each type, whereby the different types of side chains are randomly or regularly distributed in the polymer.

A functional polymer including at least two different types of side chains, having the general formula (1), ##STR00001##
wherein A is an at least monosubstituted alkylene or arylene group; B is an amide, ester or ether group and n is 0 or 1; F is selected from: an ester, secondary amine, amide, ether, thio ether, thio ester, and may be the same or different for the different side chains; D is a side chain intended to reversible bind to a substrate or has a coating function; E is a side chain intended to irreversible bind to a substrate, the side chain E and polymer includes 1 to 10 different side chains D and 1 to 10 different side chains E, but at least one of each, and includes a plurality of each type, whereby the different types of side chains are randomly or regularly distributed in the polymer.

Disclosed is a dianhydride having Formula I, and diamines having Formula IV and Formula VII ##STR00001## In the formulas: Y is alkyl, silyl, ester, siloxane, oligosiloxane, polysiloxane, O, S, SO.sub.2, BR.sup.3, NR.sup.3, P(O)R.sup.3, unsubstituted or substituted carbocyclic aryl, or unsubstituted or substituted heteroaryl and deuterated analogs thereof; Ar.sup.2 Ar.sup.4 are the same or different and are carbocyclic aryl, heteroaryl, or substituted derivatives thereof; Q.sup.1 is a single bond, alkyl, silyl, ester, siloxane, oligosiloxane, polysiloxane, O, S, SO.sub.2, BR.sup.3, NR.sup.3, P(O)R.sup.3, unsubstituted or substituted carbocyclic aryl, or unsubstituted or substituted heteroaryl and deuterated analogs thereof; R.sup.1-R.sup.2 are the same or different at each occurrence and are F, CN, deuterium, alkyl, fluoroalkyl, unsubstituted or substituted carbocyclic aryl, unsubstituted or substituted heteroaryl, alkoxy, fluoroalkoxy, unsubstituted or substituted aryloxy, silyl, siloxy and deuterated analogs thereof; R.sup.3 is alkyl or unsubstituted or substituted carbocyclic aryl; a and b are the same or different and are an integer from 0-5; and c is 0 or 1.

Disclosed is a dianhydride having Formula I, and diamines having Formula IV and Formula VII ##STR00001## In the formulas: Y is alkyl, silyl, ester, siloxane, oligosiloxane, polysiloxane, O, S, SO.sub.2, BR.sup.3, NR.sup.3, P(O)R.sup.3, unsubstituted or substituted carbocyclic aryl, or unsubstituted or substituted heteroaryl and deuterated analogs thereof; Ar.sup.2 Ar.sup.4 are the same or different and are carbocyclic aryl, heteroaryl, or substituted derivatives thereof; Q.sup.1 is a single bond, alkyl, silyl, ester, siloxane, oligosiloxane, polysiloxane, O, S, SO.sub.2, BR.sup.3, NR.sup.3, P(O)R.sup.3, unsubstituted or substituted carbocyclic aryl, or unsubstituted or substituted heteroaryl and deuterated analogs thereof; R.sup.1-R.sup.2 are the same or different at each occurrence and are F, CN, deuterium, alkyl, fluoroalkyl, unsubstituted or substituted carbocyclic aryl, unsubstituted or substituted heteroaryl, alkoxy, fluoroalkoxy, unsubstituted or substituted aryloxy, silyl, siloxy and deuterated analogs thereof; R.sup.3 is alkyl or unsubstituted or substituted carbocyclic aryl; a and b are the same or different and are an integer from 0-5; and c is 0 or 1.

The present invention relates to an extrudable polymer composition comprising: 99.5 to 99.95% of at least one hard-soft block copolymer comprising: at least 25% by weight of soft block polyethylene glycol (PEG) with functionality equal to 2, with respect to the total weight in copolymer; from 0.05 to 0.5% by weight of at least one polyol comprising at least three hydroxyl groups, with respect to the total weight of the composition; characterised in that: the weight-average molecular mass of said copolymer is at least equal to 100,000 g/mol; and the weight-average molecular mass of the polyol is at least equal to 1000 g/mol; and said at least one polyol binding hard copolymer blocks by ester bonds.
This invention relates in particular to the use of said composition in extrusion processes for manufacturing vapour-permeable objects.

The present invention is directed to a process for preparing amides or polyamides by replacing isocyanate starting materials of a catalyzed thermal reaction with aromatic carbamates. Through the catalyzed thermal process involving a non-isocyanate precursor of the present invention, efficiency for producing amides or polyamides can be significantly improved, and the impure side products produced from a side reaction of isocyanate can be greatly curtailed. Hence, amides or polyamides of high purity and yield can be achieved. The invention also relates to a process for preparing aromatic carbamates, the new non-isocyanate precursors for amides or polyamides.

The present invention is directed to a process for preparing amides or polyamides by replacing isocyanate starting materials of a catalyzed thermal reaction with aromatic carbamates. Through the catalyzed thermal process involving a non-isocyanate precursor of the present invention, efficiency for producing amides or polyamides can be significantly improved, and the impure side products produced from a side reaction of isocyanate can be greatly curtailed. Hence, amides or polyamides of high purity and yield can be achieved. The invention also relates to a process for preparing aromatic carbamates, the new non-isocyanate precursors for amides or polyamides.

Complexing or chelating agents that offer strong, selective bonding with uranium as well as a broad pH range of effectiveness, specifically including the pH range around 8.2, together with the acrylic double bonds required for radiation-induced grafting on polymers to remove uranium from a solution such as seawater. The novel adsorbing species are phosphorus-containing molecules, in particular organic phosphates, phosphonates and phosphoric acids. Organic phosphorus compounds, for example, organic phosphates, phosphonates, and phosphoric acids, are attached to polymer fibers to form fibers, fiber fabrics or membranes that are effective, or show activity, in uranium adsorption.

Complexing or chelating agents that offer strong, selective bonding with uranium as well as a broad pH range of effectiveness, specifically including the pH range around 8.2, together with the acrylic double bonds required for radiation-induced grafting on polymers to remove uranium from a solution such as seawater. The novel adsorbing species are phosphorus-containing molecules, in particular organic phosphates, phosphonates and phosphoric acids. Organic phosphorus compounds, for example, organic phosphates, phosphonates, and phosphoric acids, are attached to polymer fibers to form fibers, fiber fabrics or membranes that are effective, or show activity, in uranium adsorption.