Mastic table

Table 4 Hsts flow properties of a set of impression waxes the exact compositions of which are trade secrets. The materials that have been identified in the compositions are paraffin, ceresin, vegetable waxes, rosin, mastic gum, and spermaceti.

Latex Adhesive Applications. Polychloroprene latex adhesives have a long history of use in foil laminating adhesives, facing adhesives, and constmction mastics. Increasingly stringent restrictions on the emission of photoreactive solvents has heightened interest in latex compounds for broader apphcations, particularly contact bond adhesives. Table 10 makes a general comparison of solvent and latex contact bond adhesives (158). 

Table 5.2 Components of fresh mastic resin, as reported in the literature [34], with corresponding m/z values of the sodium adducts (see Figure 5.7b)...

Several studies have dealt with the problem of discriminating between mastic and dammar, and three marker compounds of mastic have been identified moronic, masticadienonic and acetyl masticadienolic acids [42], The chemical structure of (iso)masticadienonic acid and 3-0-acetyl-3-epi(iso)masticadienonic acid is characterized by a side chain, as for dammarane molecules, but with a carboxylic acid end group (Table 12.1). Under pyrolysis conditions this side chain is susceptible to cleavage as demonstrated by the presence, among the pyrolysis products of mastic, of 2-methyl-pent-2,4-dienoic acid, that perfectly matches with the chemical structure of the side chain end. In addition 3-(9-acetyl-3-epi-(iso)masticadienolic acid also loses the acetyl group and, in contrast to masticadienonic acid, is not detected at all. 

While the Dove composition described in Table 9.4-2 was processable at reasonable line speeds on a conventional soap processing line (roll mills, extruders, stampers), some equipment modifications were necessary. For example, whereas soap is normally mixed in large agitated tanks, the Dove mixture had a much greater viscosity and therefore required use of a steam-jacketed kneader mixer such as those used to make bread dough, pastes or mastics. 

Table 10. Mechanical synthesis of interpolymers by mastication of polymer blends...

Thus in coloring polymers by mastication it should be considered that dyes of different classes, even in small amounts, may affect the material properties, see Table 11. 

Table 11. Mastication of polystyrene-rubber system. Effect of dyes on interpolymer strength (5)...

Table 12. Polymerization of styrene by poly(methyl acrylate) mastication (30% of monomer). Effect of rubber molecular weight on interpolymer composition (/i)...

Table 13. Polymerization of monomers by vulcanized rubber mastication. Effect of vulcanization recipes (/, 70)... 

Fig. 17. Polymerization of monomers by synthetic rubber mastication. 1 13.8% methyl methacrylate in neoprene. 2 13.6% chloroprene in neoprene. 3 13.8% methyl methacrylate in polybutadiene-styrene. 4 13.6% chloroprene in polybutadiene-styrene. 5 14.5% styrene in polybutadiene-arylonitrile. c indicates that the rubber became a crumb at approximately the arrowed time of mastication. 6 11% methyl methacrylate in rubber — from Table X in original...

Mechanical Synthesis of Block and Graft Copolymers Table IS. Polymerization of monomers by mastication of elastomers... 

Table 16. Modification of rubbers properties by masticating with vinyl monomers (1,75)...

Table 18. Polymerization of various monomers by poly (vinyl chloride) mastication (56)... 

Figure 28 shows the plastogram for an interstructural monomer (styrene). The mechanoehemical synthesis by mastication was also applied to natural polymers (80,82). The results are reported on Tables 19 and 20. 

Table 20. Polymerization of vinyl polymers by mastication of cellulose derivatives (80)...

The model mouth and RAS are two examples of mouth simulators. A representative set of mouth simulators are compared in Table Gl.7.1. All account for temperature, breath flow, and mastication. Only the model mouth and the RAS allow for the evaluation of solid foods and have been compared directly to human breath. 

Three polybutadiene/poly isoprene diblocks were provided to us by Paul Rempp of CRM, Strasbourg. Details of the molecular weights and the expected diene microstructures were discussed earlier (1,13) and are summarized in Table I. Homopolymers of corresponding microstructures and molecular weights (1,13) are also described in Table I. The molecular-weight distributions of the homopolymers are considerably broader than those of the block polymers, owing to a mastication procedure (13) carried out on these samples to lower their molecular weights. To insure that" the microstructures of the homopolymers were well matched to the constituent blocks in the copolymers, 60-MHz NMR spectra were obtained on a Varian T-60 apparatus for the diblocks, the individual homopolymers, and three equivalent homopolymer blends (13). 

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