Butadiene methacrylate

Butadiene—Methacrylic Acid Ionomers. Carboxyl groups can readily be introduced into butadiene elastomers by copolymerization, and the effects of partial neutralization have been reported (63—66). The ionized polymers exhibit some degree of fluidity at elevated temperatures, but are not thermoplastic elastomers, and are very deficient in key elastomer properties such as compression set resistance. 

For the styrene-butadiene-methacrylic acid copolymers, meth-acrylic acid was also found in the serum, on the particle surface, and buried inside the particles. At 23% degree of neutralization, less methacrylic acid was found in the serum and on the particle surface than with acrylic acid, i.e., more was buried inside the particle. At 3.0% methacrylic acid, the amount incorporated into the particle was fairly constant, independent of the degree of neutralization. The different distributions of methacrylic and acrylic acids were explained by their different distributions between the monomer-polymer and aqueous phases. Thus these characterization results show the effect of vinyl carboxylic acid type and concentration on the loci of the carboxyl groups. Similar correlations could be made with other systems. 

Toriumi et al(24) found that the ESR spectra of solid state Mh-SPS samples with varying sulfonate concentration could be reconstructed from a linear combinati of two spectra one purportedly due to entirely isolated Mn ions and one due to entirely associated ions. By doing so, these auth s were able to estimaj the relative concentrations of the two Mn states. For the Cu salt of a butadiene-methacrylic acid ionomer, Finerl et al(25) observed two distinct ESR signals at 33856 and another at 47356... 

If we identify D with the intercluster distance deduced from the ionomer peak, this c-1/3 law has been observed in butadiene-methacrylic ionomers (8) and pentanemer sulfonate (9). Conversely, a law of this type cannot be explained in the absence of clusters of capacity independant of c, such the one described in this model. 

Isoprene (2-methyl--1,3-butadiene) Methacrylic acid (2-methylpropenic acid) CHj=CH—C(CHj)=CH CH,=C(CHj)COOH... 

ABN rubber (acrylonitrile/butadiene/methacrylic acid, from Ciba Geigy) ... 

Core-shell copolymer EPDM grafted with styrene-butadiene methacrylate or allyl cyanurate processability, high notched impact strength Siol et al., 1993... 

Butadiene-methacrylic acid copolymer (0.12 ephr COOH) 100 1600... 

Copoly(Butadiene - a- Methylstyrene), Modified, see Terpoly(Butadiene - Methacrylate - Styrene) 631-... 

Copolymer of acrylonitrile, acrylate (ester), and styrene Acrylonitrile-butadiene-acrylate copolymer Copolymer of acrylonitrile-butadiene-methyl acrylate Copolymer of acrylonitrile-butadiene-methacrylic acid Elastomeric copolymer from an acrylate (ester) and butadiene, a mbber... 

A Poly(butadieneacrylonitrile) poly (butadiene) (-OH terminated) octadecylvinyl ether/maleic anhydride copolymer blend poly(vinyl stearate) poly (butadiene methacrylate) poly(l-butadiene) Generally exhibited highest sensitivity to test vapors, especially phosphonates (DMMP, DIMP) and octane... 

Additionally to the procedures described earlier, improvements for thermostabilization is copolymerisation of vinyl chloride with suitable monomers. A great number of monomers were investigated to optimize the properties of resins. But only vinyl acetate, vinylidene chloride, ethylene, propylene, acrylonitrile, acrylic acid esters, and maleic acid esters, respectively, are of interest commercially [305,436,437]. The copolymerization was carried out in emulsion, suspension, and solution in connection with water- or oil-soluble initiators, as mentioned elsewhere. Another possibility for modifying PVC is grafting of VC on suitable polymers [305,438], blends of PVC with butadiene/styrene and butadiene/ methacryl acid esters copolymers [433], and polymer-analogous reactions on the macromolecule [439,440] (e.g., chlorination of PVC). 

Elastomer adhesion mechanisms are discussed first from the viewpoint of vulcanization bonding to metals. The approaches of brass plate bonding, bonding with ebonite, with butadiene-methacrylic acid copolymers, and with proprietary adhesives are cursorily reviewed to invoke theories of chemisorption, diffusion, and directed chemical reaction. The time dependency of peel strength as an adhesion response through the vulcanization cycle is cited as a possible indication of mechanism. 

R-to-M Bonding with Butadiene - Methacrylic Acid Copolymers. 

Upon ozonolysis this copolymer yields succinic acid, succindialdehyde and dicarboxylic acids containing several MMA residues. The percentage of butadiene (9.2%) recovered as succinic acid and succindialdehyde provided a measure of the 1,4-butadiene-l,4-butadiene linkages in the copolymers, and the percentage of MMA units (51%) recovered as trimethyl 2-methyl-butane-l,2,4-tricarboxylate (4) n = 1, provided a measure of the MMA units in the middle of butadiene-methacrylate-butadiene triads. 

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