Maleic anhydride terpolymers

In the case of EVOH being used as an interlayer with polyethylene or polystyrene, it is necessary to use additional adhesive layers such as an ethylene-vinyl acetate-maleic anhydride terpolymer (e.g. Orevac— Atochem). 

When evaluated by LOI, the system with zeolites has higher LOI than that without it. For example, compared with PP-APP-PER, which has an LOI of 30%, the LOI of PP-APP-PER system with zeolite 13X increases to 45%, an increase of 50%. Also the LOI of LRAM3.5 (ethylene-butyl acrylate-maleic anhydride terpolymer)-APP-PER system with 4A increases to 39%, relative to 29% for LRAM3.5-APP-PER system. All systems with zeolites obtained the UL-94V-0 grade. 

Hall W, Kruse R, Mendelson R and Trementozzi Q (1983) New styrene-maleic anhydride terpolymer blends. ACS Symp Ser 229 49-64. 

A group of new, fully miscible, polymer blends consisting of various styrene-maleic anhydride terpolymers blended with styrene-acrylonitrile copolymer and rubber-modified versions of these materials have been prepared and investigated. In particular the effects of chemical composition of the components on heat resistance and the miscibility behavior of the blends have been elucidated. Toughness and response to elevated temperature air aging are also examined. Appropriate combinations of the components may be melt blended to provide an enhanced balance of heat resistance, chemical resistance, and toughness. 

HALL ET AL. Styrene-Maleic Anhydride Terpolymer Blends... 

Blends of copolymers of styrene and acrylonitrile and butadiene and acrylonitrile called ABS plastics which are more ductile than polystyrene, are now used at an annual rate of almost 500 thousand tons. Terpoljrmers of styrene, acrylonitrile and maleic anhydride (Cadon) have heat deflection points above lOOOC.Q)While the physical properties of both ABS and the maleic anhydride terpolymers are superior to polystyrene, the improvements are not sufficient to classify them as high performance plastics. 

Recently, products composed of styrene, acrylonitrile, and maleic anhydride have been introduced as improvements over the older ABS materials. These products exhibit superior heat resistance and thermal stability in comparison to conventional ABS materials. In addition, the impact resistance of styrene-acrylonitrile-maleic anhydride terpolymers can be improved by the addition of or by grafting onto appropriate elastomers. The product also exhibits desirable rheological behavior due to polar interaction of anhydride groups during processing and drawing. 

European Polymer Journal 28,No.9,Sept.l992,p.l 147-50 INFRARED SPECTROPHOTOMETRY OF MALEIC ANHYDRIDE TERPOLYMERS... 

The effects on dissolution inhibitors on the dissolution of a 193 nm terpolymers poly(norbomene-aZt-melaic anhyd-ride-co-acrylic acid) (p(NB/MA-20%AA) are shown in Figure 57.7 [39]. Again the dissolution rate of this 193 nm terpolymer is significantly reduced with the addition of the dissolution inhibitors. The effects of various dissolution inhibitors were attributed to the varied degree of the interactions between the base pol5rmer and the dissolution inhibitors. In these cycloolefin-maleic anhydride terpolymer systems, the position of the base soluble carboxylic group... 

DuPont s Fusabond AEB-560D is a modified ethylene-acrylate copolymer for use in polyamides. It is claimed to be a cost-effective toughener, more effective than maleic anhydride terpolymers and usable at low temperatures, while improving mould flow, with less of an adverse effect on the flexural modulus. 

Thus, workers at Hewlett Packard [13] using this technique identified six volatiles in styrene-acrylonitrile-maleic anhydride terpolymer (benzene, toluene, ethylbenzene, styrene, aromatics, and maleic anhydride). 

In previous work we have combined the intumescent APP-PER system with zeolites in an ethylene-butyl acrylate-maleic anhydride terpolymer (hereafter called LRAM3.5) and we have observed (in particular with 4A zeolite) a high degree of improvement in fire-proofing properties (Figure 6.4). 

PP, isotactic polypropylene LDPE low-density polyethylene PS polystyrene LRAM3.5 ethy-lene-butylacrylate-maleic anhydride terpolymer (Lotader P3200, Elf-Atochem). 

AMA acrylate maleic anhydride terpolymer HMWHDPE high-molecular-weight high-density polyethylene... 

Random distribution) Vinyl chloride, vinyl acetate, maleic anhydride terpolymer (VMCH)... 

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