Styrene/polystyrene

H CHS V-c" / H C—OCHo A F F =C/ F F Styrene Polystyrene Cast articles using a transparent plastic... 

This method was first applied by McCormick27 and by Bywater and Worsfold11 to the system a-methylstyrene/poly-a-methyl-styrene, and the free energy, entropy and heat of polymerization as well as the ceiling temperature were determined. Similar studies concerned with the system styrene/polystyrene are being carried out in our laboratories. 

Fig. 8. Comparison of the measured and predicted exit concentrations obtained by Latinen for a styrene-polystyrene system. Reproduced with permission from Latinen (1962). Copyright 1982 American Chemical Society.

In a system of significant interest to the present works, Graillard, et al. [62] studied the ternary phase diagrams of the systems polybutadiene-styrene-polystyrene and polybutadiene-block-polystrene-styrene-polystyrene. They showed that the presence of block copolymer increased the miscibility of the two poljrmers, as the styrene component polymerized. Similar effects are probable in the IPN s, as compared with the corresponding blends. 

Fig. 1. US total sales and captive use of selected thermoplastic resins by major market for 2001. Major market volumes are derived from plastic resins sales and captive use data as compiled by VERIS Consulting, LLC and reported by the American Plastics Council s Plastic Industry Producers Statistics Group. Selected thermoplastics are low-density polyethylene, linear low-density polyethylene, high-density polyethylene, polypropylene, nylon, polyvinyl chloride, thermoplastic polyester, engineering resins, acrylonitrile-butadiene-styrene, styrene-acrylonitrile, other styrenics, polystyrene, and styrene butadiene latexes. (Data from ref. 25.)...

Benzene is used as a chemical intermediate for the production of many important industrial compounds, such as styrene (polystyrene and synthetic rubber), phenol (phenolic resins), cyclohexane (nylon), aniline (dyes), alkylbenzenes (detergents), and chlorobenzenes. These intermedi-... 

Random chain cleavage followed by chain unzipping is characterized by high monomer yields and a slow decrease in the molecular weight of the polymer, for example, exhibited by PMMA, poly(a-methyl styrene), polystyrene polytetrafluoroethylene. 

Figure 3.4 Ternary phase diagram for the system styrene-polystyrene-polybutadiene rubber. Reproduced with permission from Encyclopedia of Polymer Science and Engineering, Mark (Ed.), John Wiley Sons, NY. Copyright John Wiley Sons...

If the addition of pentane occurs at 60-70% conversion, two influences result an increase in pressure due to the arranged loss of soluble styrene with increasing conversion, and a decrease in pressure because of increasing diffusion of pentane into the beads. The equilibrium pressure for the quaternary system styrene-polystyrene-isopentane-n-pentane has been calculated by Wolfahrt [27] for different conversions, temperatures and //-/isopentane ratios using a thermodynamic sorption model based on chain-of-rotators equation-of-state. 

The beginning of cellular polystyrene may be dated back to the time of the discovery of a material called styrene. Polystyrene is a clear, brittle, thermoplastic aromatic resin ... 

Ethylene Hydrogen peroxide (EU) Styrene Polystyrene (EU) ABS (EU) PVC HDPE/LDPE... 

Separation of benzene/cyclohexane mixture is investigated most extensively. This is not surprising because separation of this mixture is very important in practical terms. Benzene is used to produce a broad range of valuable chemical products styrene (polystyrene plastics and synthetic rubber), phenol (phenolic resins), cyclohexane (nylon), aniline, maleic anhydride (polyester resins), alkylbenzenes and chlorobenzenes, drugs, dyes, plastics, and as a solvent. Cyclohexane is used as a solvent in the plastics industry and in the conversion of the intermediate cyclohexanone, a feedstock for nylon precursors such as adipic acid. E-caprolactam, and hexamethylenediamine. Cyclohexane is produced mainly by catalytic hydrogenation of benzene. The unreacted benzene is present in the reactor s effluent stream and must be removed for pure cyclohexane recovery. 

A half-rufhenocene complex, Ru(indenyl)Cl(PPh3)2 was similarly used for polymerization of MMA in conjunction wifh an MMA-dimer-type initiator, H(MMA)2C1 (Scheme 6.181) [233]. Addition of Al(Oi-Pr)3 accelerated the polymerization rate to afford similar living polymers (M /M = 1.1). The behavior of the Ru-Ind complex was similar in the polymerization of styrene. Polystyrene with narrow MWD (M /Mn= 1.1) was obtained by use of a suitable radical initiator -Me2C(CO2Et)Br. 

Styrene/Polystyrene - BP (Dibenzoylperoxide)TBPB (tert.Butylperbenzoate). .. 158... 

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