An elastomer, a process for forming an elastomer, and an article of manufacture are disclosed. The elastomer comprises a phosphazene backbone and at least one polyhexahydrotriazine component. The process for forming the elastomer includes obtaining an amine-terminated cyclotriphosphazene, reacting it with a diamine to form a phosphazene-containing PHT polymer, and then reacting the phosphazene-containing PHT polymer with a side-chain modified cyclic phosphazene to form a PCPHT elastomer with halogen ligands. The PCPHT elastomer with halogen ligands is then reacted with an alkoxide to form a PCPHT elastomer with at least one ether-linked side chain. The article of manufacture comprises a material comprising an elastomer having a phosphazene backbone and at least one PHT component.

Disclosed herein are the water clarification compositions and method of using the disclosed water clarification compositions for clarifying a water system or waste water source. Specifically, the disclosed compositions comprise and methods use multiple charged cationic or anionic compounds that are derived from polyamines through an aza-Michael addition with an activated olefin having an ionic group. The disclosed water clarification methods or compositions are found to be more effective than those methods or compositions including commonly used single quaternary compounds for reducing turbidity in water systems or waste water sources.

An elastomer, a process for forming an elastomer, and an article of manufacture are disclosed. The elastomer comprises a phosphazene backbone and at least one polyhexahydrotriazine component. The process for forming the elastomer includes obtaining an amine-terminated cyclotriphosphazene, reacting it with a diamine to form a phosphazene-containing PHT polymer, and then reacting the phosphazene-containing PHT polymer with a side-chain modified cyclic phosphazene to form a PCPHT elastomer with halogen ligands. The PCPHT elastomer with halogen ligands is then reacted with an alkoxide to form a PCPHT elastomer with at least one ether-linked side chain. The article of manufacture comprises a material comprising an elastomer having a phosphazene backbone and at least one PHT component.

A method for forming a conjugated heteroaromatic polymer is described, wherein at least one compound of formula (1) is polymerized using an acid as a catalyst, ##STR00001##
wherein X is selected from S, O, Se, Te, PR.sup.2 and NR.sup.2, Y is hydrogen (H) or a precursor of a good leaving group Y.sup. whose conjugate acid (HY) has a pK.sub.a of less than 30, Z is hydrogen (H), silyl, or a good leaving group whose conjugate acid (HY) has a pK.sub.a of less than 30, b is 0, 1 or 2, each R.sup.1 is a substituent, and the at least one compound of formula (1) being polymerized includes at least one compound of formula (1) with ZH and YH.

Disclosed is a vinylbenzyl imide resin useful in conjunction with other components to prepare a resin composition for making such as a prepreg, a resin film, a resin film with copper foil, a laminate or a printed circuit board, having improved one or more properties including resin flow, resin filling property, flame retardancy, glass transition temperature, thermal resistance, dielectric constant, dissipation factor and interlayer bonding strength. Also disclosed is a method of preparing the vinylbenzyl imide resin, its prepolymer, a resin composition comprising the vinylbenzyl imide resin and/or its polymer and an article made therefrom.

Degradable sulfur-containing hyperbranched epoxy resin and a preparation method thereof. The preparation method comprises initiating a reaction of a mercaptocyclotriazine compound and a binary olefin by ultraviolet light to prepare a mercapto hyperbranched polymer; then reacting with glycidyl methacrylate to obtain a degradable sulfur-containing hyperbranched epoxy resin of which the molecular weight is about 3,000-35,400 g/mol. After the degradable sulfur-containing hyperbranched epoxy resin is cured, a cyclotriazine structure can be completely degraded within 1.5 h in a phosphoric acid solution at the temperature of 80 DEG C, thus realizing the recycle of the epoxy resin. The invention is simple in process, low in reaction temperature, rapid in reaction and high in yield, the sulfur-containing structure lowers curing temperature and realizes rapid curing, and cyclotriazine structure has a degradation function, and is expected to be used in the fields of strengthening and toughening of the epoxy resins, solvent-free coatings, electronic packaging.

A flame retardant levulinic acid-based compound, a process for forming a levulinic acid-based flame retardant polymer, and an article of manufacture comprising a material that contains a flame retardant levulinic acid-based polymer are disclosed. The flame retardant levulinic acid-based compound has variable moieties, which include phenyl-substituted and/or R functionalized flame retardant groups. The process for forming the flame retardant polymer includes forming a phosphorus-based flame retardant molecule, forming a levulinic acid derivative, chemically reacting the phosphorus-based flame retardant molecule and the levulinic acid derivative to form a flame retardant levulinic acid-based compound, and incorporating the levulinic acid-based flame retardant compound into a polymer to form the flame retardant polymer.

Disclosed herein are the water clarification compositions and method of using the disclosed water clarification compositions for clarifying a water system or waste water source. Specifically, the disclosed compositions comprise and methods use multiple charged cationic or anionic compounds that are derived from polyamines through an aza-Michael addition with an activated olefin having an ionic group. The disclosed water clarification methods or compositions are found to be more effective than those methods or compositions including commonly used single quaternary compounds for reducing turbidity in water systems or waste water sources.

A preparation method of a zeolite/polyimide composite membrane includes: synthesizing a zeolite-doped polyamic acid precursor casting solution by condensation polymerization synthesis; coating a substrate with the obtained casting solution, and obtaining a zeolite/polyamic acid composite porous membrane by non-solvent induced phase separation; and obtaining the zeolite/polyimide composite membrane by performing thermal imidization on the zeolite/polyamic acid composite porous membrane through gradient heating.

The invention relates to hydroxybenzophenone-based compounds of formula (I) that are used to improve UV, thermal, and thermo-oxidative stability of high performance aromatic polymers in a blend or as end-cappers of the same polymers.