SAN See Styrene acrylonitrile copolymers

Sammi Gelatine. See Gelatin SAN. See Styrene/acrylonitrile copolymer Sanafloc 5521-P. See Polyquatemium-6 Sancel-101 Sancel-102 Sancel-105. See Microcrystalline cellulose Sancel-C Sancel-W. See Cellulose SAN copolymer. See Styrene/acrylonitrile copolymer... 

Multi-SAN 3008 R] Multi-SAN 6074. See Styrene/acrylonitrile copolymer Multi-SBS. See Styrene/butadiene/styrene block copolymer... 

A material made by blending polymers or copolymers with other polymers or elastomers under selected conditions, e.g., styrene-acrylonitrile copolymer (SAN) blended with butadiene-acrylonitrile elastomer (NBR). A mixture of two chemically different polymers to form a material having properties different from but often comprising those of the original resins. Also see Polymer alloy. Low-molecular-weight polymerization product of allyl monomer, CH2 = CHCH2X, where, for example, X = -OH, -OOCCH3. 

Styrene Acrylonitrile Copolymer (SAN) see Gypsum Calcium Sulfide... 

Polyethylene, HDPE Polyethylene, MDPE Polymethyl Methacrylate (PMMA) 5-9 8 8-9 Styrene Butadiene Copolymer Sodium Hypochlorite Bleaching Solution see Eau de Labarraque 8-9 Nylon 612 (PA 612) Nylon 66 (PA 66) Polyamide, Nylon Polycaprolactones Polycarbonate Polyethylene Polyethylene Terephthalate (PET) Polyethylene, HDPE Polyethylene, MDPE Polymethylpentene (PMP) Polypropylene Polystyrene (PS) Polystyrene, Impact (IPS) Polyvinylidene Chloride (PVDC) Styrene Acrylonitrile Copolymer (SAN) Sodium Nitrilotriacetate 8 8-9 9... 

Styrene [100-42-5] (phenylethene, viaylben2ene, phenylethylene, styrol, cinnamene), CgH5CH=CH2, is the simplest and by far the most important member of a series of aromatic monomers. Also known commercially as styrene monomer (SM), styrene is produced in large quantities for polymerization. It is a versatile monomer extensively used for the manufacture of plastics, including crystalline polystyrene, mbber-modifted impact polystyrene, expandable polystyrene, acrylonitrile—butadiene—styrene copolymer (ABS), styrene—acrylonitrile resins (SAN), styrene—butadiene latex, styrene—butadiene mbber (qv) (SBR), and unsaturated polyester resins (see Acrylonithile polya rs Styrene plastics). 

Styrene Copolymers. Acrylonitrile, butadiene, a-methylstyrene, acryUc acid, and maleic anhydride have been copolymerized with styrene to yield commercially significant copolymers. Acrylonitrile copolymer with styrene (SAN), the largest-volume styrenic copolymer, is used in appHcations requiring increased strength and chemical resistance over PS. Most of these polymers have been prepared at the cross-over or azeotropic composition, which is ca 24 wt % acrylonitrile (see Acrylonithile polya rs Copolyp rs). 

The potential problem of styrene taint in foods is well known and documented in the literature (Saxby 1996). Styrene (see Chapter 2) is the monomer that is polymerized to make polystyrene (PS) (also known as general purpose or GPPS grade). It is also commonly used with butadiene rubber (5-20 % w/w) as a block copolymer to form high impact polystyrene (HIPS). In addition there are less common copolymer grades such as acrylonitrile-butadiene-styrene (ABS) having a mixture of 25 %, 15-25 % and 50-65 % of each monomer respectively or a copolymer with acrylonitrile (styrene-acrylonitrile, SAN). 

We have just discussed several methods for improving the mechanical properties of polymers. In addition to these techniques, one could think about synthesizing copolymers of styrene and less brittle monomer(s). Actually, we have already seen that this approach has been used with considerable success (see Chapter 5 and Table 5-2). Styrene-acrylonitrile (SAN) copolymers and acrylonitrile-butadiene-styrene (ABS) terpolymers have excellent impact strength. Although sometimes copolymerization is a viable option, oftentimes a completely different approach is called for. Let s see how. 

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