The invention generally relates to synthetic mimics of cell penetrating peptides. More particularly, the invention relates to certain novel monomers, oligomers and polymers (e.g., co-polymers) that are useful for the preparation of synthetic mimics of cell penetrating peptides, their compositions, preparations and use.

The invention generally relates to synthetic mimics of cell penetrating peptides. More particularly, the invention relates to certain novel monomers, oligomers and polymers (e.g., co-polymers) that are useful for the preparation of synthetic mimics of cell penetrating peptides, their compositions, preparations and use.

Various vinyl addition polymers of nadic anhydride are disclosed. Examples of such polymers include copolymers and terpolymers of nadic anhydride with a wide variety of norbornene-type monomers. The nadic anhydride polymers are found to be useful in forming a wide variety of photosensitive compositions, both positive and negative, which are capable of forming high resolution imageable films exhibiting excellent dielectric properties (low-k) and thermal properties, and thus are useful in the fabrication of a variety of microelectronic and optoelectronic devices, among others.

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.

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.

Biodegradable copolymers obtainable via radically initiated emulsion polymerization processes are provided. The biodegradable copolymers contain one or more monomer units of the formula I,

##STR00001##

and vinyl acetate units. In formula I, n=1 to 3, X.sup.1 and X.sup.2 independently of one another are the atoms O or S or the group NR.sup.7, R.sup.1 and R.sup.2 independently of one another are hydrogen, an alkyl, alkenyl, alkoxy or aryl radical or a spirocyclic aliphatic group, and R.sup.3, R.sup.4, R.sup.5, R.sup.6 and R.sup.7 independently of one another are hydrogen or an alkyl or aryl radical.

Biodegradable copolymers obtainable via radically initiated emulsion polymerization processes are provided. The biodegradable copolymers contain one or more monomer units of the formula I,

##STR00001##

and vinyl acetate units. In formula I, n=1 to 3, X.sup.1 and X.sup.2 independently of one another are the atoms O or S or the group NR.sup.7, R.sup.1 and R.sup.2 independently of one another are hydrogen, an alkyl, alkenyl, alkoxy or aryl radical or a spirocyclic aliphatic group, and R.sup.3, R.sup.4, R.sup.5, R.sup.6 and R.sup.7 independently of one another are hydrogen or an alkyl or aryl radical.

Disclosed in the present invention are a bottom anti-reflective coating for deep ultraviolet lithography, a preparation method therefor and the use thereof. A polymer disclosed in the present invention is prepared by the following method: (1) preheating a solvent I; (2) mixing a monomer as shown in formula (A), a monomer as shown in formula (B), a monomer as shown in formula (C), a cross-linking agent as shown in formula (L), and an initiator and a solvent II to obtain a mixed solution; and (3) adding the mixed solution to a preheated solvent and perform a polymerization reaction, wherein step (1) and step (2) are in no particular order. The bottom anti-reflective coating for deep ultraviolet lithography can reduce the reflectivity, and after the bottom anti-reflective coating is spin-coated with a photoresist, no scum formed by the bottom anti-reflective coating is observed.

##STR00001##

Disclosed in the present invention are a bottom anti-reflective coating for deep ultraviolet lithography, a preparation method therefor and the use thereof. A polymer disclosed in the present invention is prepared by the following method: (1) preheating a solvent I; (2) mixing a monomer as shown in formula (A), a monomer as shown in formula (B), a monomer as shown in formula (C), a cross-linking agent as shown in formula (L), and an initiator and a solvent II to obtain a mixed solution; and (3) adding the mixed solution to a preheated solvent and perform a polymerization reaction, wherein step (1) and step (2) are in no particular order. The bottom anti-reflective coating for deep ultraviolet lithography can reduce the reflectivity, and after the bottom anti-reflective coating is spin-coated with a photoresist, no scum formed by the bottom anti-reflective coating is observed.

##STR00001##

An optical film including a polymer including a repeating unit A including a repeating unit represented by the following Chemical Formulas 1 to 3, or a combination thereof; and a repeating unit B derived from a monomer having an unsaturated bond copolymerizable with the repeating unit A, wherein the optical film has a short wavelength dispersion of an in-plane phase-difference value (R.sub.e) (450 nm/550 nm) ranging from about 0.81 to about 1.20, and a long wavelength dispersion of an in-plane phase-difference value (R.sub.e) (650 nm/550 nm) ranging from about 0.90 to about 1.18: ##STR00001##
wherein, in Chemical Formulas 1 to 3, the variables R.sup.1 to R.sup.21 are defined herein.