Copolymers styrene/maleic anhydrid

Synonyms 2,5-Furandione, polymer with ethenylbenzene Maleic anhy-dride/styrene copolymer Maleic anhydride/styrene polymer Poly (sly-rene-co-maleic anhydride) SMA Styrene/maleic anhydride copolymer Styrene/maleic anhydride polymer Styrene/maleic anhydride resin Classification Engineering thermoplastic styrene polymer DeTinltton Polymer of serene and maleic anhydride monomers, with varying ratios of styrene MA of 1 1 to 3 1 Formula (C.H, CiHjO,),... 

Styrene maleic anhydride amic acid resin. See Styrene/MA amic acid resin Styrene/maleic anhydride copolymer. See Styrene/MA copolymer Styrene/maleic anhydride copolymer, ammonium salt. See Styrene/MA copolymer, ammonium salt... 

Using micro-Raman imaging three blends consisting of PP/PE/EPR copolymer, PBT/polycarbonate/LDPE, and SAN copolymer/styrene-maleic anhydride copolymer/polydimethylphenylene oxide were studied with regard to compositional and morphological heterogeneities (221). 

Styrene block copolymer Styrene-ethylene block (copolymer) Styrene maleic anhydride Sheet molding compound... 

Rigid Thermoplastic Urethane (RTPU) Styrene Acrylonitrile Copolymer (SAN) Styrene Butadiene Copolymer Styrene Maleic Anhydride Copolymer (SMA)... 

Styrene Acrylonitrile Copolymer (SAN) Styrene Butadiene Copolymer Styrene Maleic Anhydride Copolymer (SMA) Sodium Hypochloride 7-9 7-9 Acetal, Copolymer (POM Copolymer) Nylon 6 (PA 6) Nylon 610 (PA 610) Nylon 66 (PA 66) Polyamide, Nylon 9 6 8 2 2 8 8-9... 

When a 0.8006-g sample of a poly(styrene/maleic anhydride) copolymer was prepared in the same manner, the following results were obtained... 

Styrene—maleic anhydride copolymer [9011-13-6] engineering thermoplastics, paper treatment chemicals, floor poHshes, emulsifiers, protective coUoids, antisoil agents, dispersants... 

Low molecular weight (1000—5000) polyacrylates and copolymers of acryflc acid and AMPS are used as dispersants for weighted water-base muds (64). These materials, 40—50% of which is the active polymer, are usually provided in a Hquid form. They are particularly useful where high temperatures are encountered or in muds, which derive most of their viscosity from fine drill soHds, and polymers such as xanthan gum and polyacrylamide. Another high temperature polymer, a sulfonated styrene maleic—anhydride copolymer, is provided in powdered form (65,66). AH of these materials are used in relatively low (ca 0.2—0.7 kg/m (0.5—2 lb /bbl)) concentrations in the mud. 

A commercially important example of the special case where one monomer is the same in both copolymers is blends of styrene—acrylonitrile, 1 + 2, or SAN copolymers with styrene—maleic anhydride, 1 + 3, or SMA copolymers. The SAN and SMA copolymers are miscible (128,133,144) so long as the fractions of AN and MA are neatly matched, as shown in Figure 4. This suggests that miscibility is caused by a weak exothermic interaction between AN and MA units (128,133) since miscibility by intramolecular repulsion occurs in regions where 02 7 can be shown (143) by equation 11. 

Fig. 4. Miscibihty map for blends of styrene—acrylonitrile copolymers (SAN), with styrene—maleic anhydride copolymers (SMA).

Styrene—maleic anhydride (SMA) copolymers are used where improved resistance to heat is required. Processes similar to those used for SAN copolymers are used. Because of the tendency of maleic anhydride to form alternating copolymers with styrene, composition drift is extremely severe unless the polymerization is carried out in CSTR reactors having high degrees of back-mixing. 

Most of the surface sizes used in North America are modified styrene maleic anhydride (SMA) copolymers. Commercially available materials include Scripset (Monsanto/Hercules Inc.), Cypres (Cytec), Sursize (Akzo Nobel), MSA (Morton), NovaCote (Georgia Pacific), and HTl (Hopton Technologies). Styrene acrylate emulsions that are commonly used include Jetsize and Unibond (Akzo Nobel), Basoplast (BASF), and Cypres (Cytec). Other materials used as surface sizes include acrylonitrile acrylate copolymer (Basoplast, BASF), stearylated melamine resin (Sequapel, Sequa), polyurethane (Graphsize, Vining Chemicals), and diisobutylene maleic anhydride copolymers (Baysynthol, Bayer). 

In order to obtain the desired photoconductive characteristics, toughness and adherence to the substrate it is usual to incorporate additives such as electron acceptors, plasticisers and primers. A typical electron acceptor is 2,4,7-trinitro-fluoronone, plasticisers include benzyltetraline and phenanthrene whilst as primers styrene-butadiene block copolymers (30-35% styrene) and styrene-maleic anhydride copolymers (5-30% maleic anhydride) are of use. 

An interesting application of this reaction was the use of macro-molecular anhydrides, namely, styrene-maleic anhydride or vinyl acetate-maleic anhydride copolymers in the presence of perchloric acid as catalyst, these copolymers acylate mesityl oxide or d rpnone to macromolecular pyrylium salts which, with aryl substituents, are fluorescent.No crystalline products could be obtained from succinic anhydride because of the solubility and ease of decarboxylation. 

Styrene maleic anhydride SMA is a copolymer made with or without rubber modifiers. They are sometimes alloyed with ABS and offer good heat resistance, high impact strength and gloss but with little appreciable improvement in weatherability or chemical resistance over other styrene based plastics. 

The maleic copolymer, sulfonated styrene maleic anhydride... 

Styrene-maleic anhydride-siloxane copolymer Improved impact resistance... 

Hydroxyl containing polymers may be cross-linked with diisocyanates. Fordyce and Ferry cross-linked styrene-maleic anhydride copolymers through the action of glycols. The copolymerization of divinyl with vinyl monomers may be looked upon as a method of cross-linking chain polymers. The cross-linkages are introduced simultaneously with the growth of the linear polymer chains, rather than afterwards, but this difference is secondary. 

Corrosion inhibiting compositions for metals subjected to highly acidic environments may be produced by reacting in a condensation reaction a styrene/ maleic anhydride copolymer with a polyamine to produce a polyimidoamine inhibitor [1568]. These inhibitors exhibit film-forming and film-persistency characteristics. Some relevant polyamines are listed in Table 6-2. 

Gilsonite is active as a fluid loss additive because the permeability of cement is reduced. Latex additives also act as fluid loss additives. They also act as bonding aids, gas migration preventers, and matrix intensifiers. They improve the elasticity of the cement and the resistance to corrosive fluids [921]. A styrene-butadiene latex in combination with nonionic and anionic surfactants shows less fluid loss. The styrene-butadiene latex is added in an amount up to 30% by weight of the dry cement. The ratio of styrene to butadiene in the latex is typically 2 1. In addition, a nonionic surfactant (octylphenol ethoxylate and polyethylene oxide) or an anionic surfactant, a copolymer of maleic anhydride, and 2-hydroxypropyl acrylate [719] can be added in amounts up to 2%. 

A mixture of sulfonated styrene-maleic anhydride copolymer and polymers prepared from acrylic acid or acrylamide and their derivatives [759] are dispersants for drilling fluids. The rheologic characteristics of aqueous well drilling fluids are enhanced by incorporating into the fluids small amounts of sulfonated styrene-itaconic acid copolymers [761] and an acrylic acid or acrylamide polymer [755]. 

P. Schilling. Polyamine condensates of styrene-maleic anhydride copolymers as corrosion inhibitors. Patent US 5391636,1995. 

Styrene-divinylbenzene resins, 23 353 Styrene-DVB copolymers, 14 388 Styrene ionomers, 14 466, 481 properties of, 14 470-473 Styrene liquid, 23 347 Styrene-maleic anhydride (SMA) copolymers, 23 391 copolymer, 10 207 Styrene manufacture, 24 259 Styrene manufacturing, 23 326, 334-345 development of high selectivity catalyst for, 23 339... 

Figure 4. Fluorescence spectra of (a) poly(styrene) and (b) styrene/maleic anhydride alternating copolymer in tetrahydrofuran at 20°C. Excitation wavelength 265 nm.

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