Styrene Maleic Anhydride Copolymer SMA

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

Styrene-maleic anhydride copolymer (SMA) and terpolymers with methyl methacrylate (SMA-MMA) and acrylonitrile (SMA-AN)... 

Another polyvinylic prodrug, SMANCS (Fig. 34.3), is a conjugate of a low molecular weight styrene maleic anhydride copolymer (SMA, 1.6 kDa) and neocarzinostatin (NCS). It is already marketed in Japan for the treatment of hepatocellular carcinoma. 

The most common polymers used for instrument panel stmctnres are acrylonitrile-butadiene-styrene (ABS), acrylonitrile-butadiene-styrene blended with polycarbonate (ABS/PC), polycarbonate (PC), poly(phenylene oxide) blended with nylon (PPO/nylon), poly(phenylene oxide) blended with styrene (PPO/styrene), polypropylene (PP), and styrene-maleic anhydride copolymer (SMA) [3]. The percentage of each of these polymers typically used in year 2000 models is shown below in Table 17.3 [3], All of these materials by themselves... 

DYGL Styrene maleic anhydride copolymer, SMA Polymer Composites... 

According to Jakisch et al. [79], FTIR spectroscopy is the preferred method for in-line investigation polymer melts and polymer melt reac-tions/kinetics, allowing quantitative determination of all components. FTIR analysis of compound melts enables additive level stability and effectiveness to be observed over multiple extrusion passes. The use of the ATR principle is suitable for in-line analysis of polymer melts in the extruder. The exit of the extruder was equipped with an on-line IR transmission process control system consisting of a 150 /um thick ZnSe melt flow cell. Characteristics of such systems have been described [71,74]. Another process spectrometer with an in situ ZnSe-ATR dipper probe was mounted at different positions in the extruder. For in-line ATR the residence time plays no role. Only the first 5 /xm (corresponding to the penetration depth of the IR radiation) are examined. Minor components are thus detected with difficulty. Jakisch et al. [79] monitored the conversion of styrene-maleic anhydride copolymers (SMA) with fatty amines into styrene-maleimide copolymer (SMI) during reactive extrusion by means of FTIR. In principle, both mid-IR and near-IR spectroscopy with ATR, transmission and diffuse reflectance probes are suitable for quantitative on- and in-line process analysis of multicomponent polymer... 

Styrene-maleic anhydride copolymers (SMA) Excellent heat resistance compared to typical polystyrenes Can be reinforced with glass fiber to enhance heat resistance, and with rubber to prevent plastic from becoming too brittle. Are used in IP in BMW 3 and 5 series and in Fiat Coupe, covered with polyurethane foam. [63]... 

Comparison of phthalic anhydride ternoinated polystyrene (PS-An) and 39 styrene-maleic anhydride copolymer (SMA) as compatibilizers for PA 66/polystyrene (PS) blends... 

Rigid Thermoplastic Urethane (RTPU) Styrene Acrylonitrile Copolymer (SAN) 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... 

The SAN and ABS cxjpolymers aantain approximately 25 wt% of acrylonitrile and polybutadiene rubber in amounts up to 20 wt%. Other styrene copolymers of industrial importance include styrene—maleic anhydride copolymer (SMA), styrene-divinylbenzene copolymer, acrylic—styrene-acrylonitrile terpolymer, and styrene-butadiene copolymer. Recently, metallocene catalysts have been developed to synthesize syndiotactic polystyrene (sPS). The polymerization process and process conditions have major effects on polymer properties and process economy. For styrene homopolymerization and copolymerization, various types of polymerization reactors are used commercially. 

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