Trimethylol propane trimethacrylate

Wood wafers were treated with mixtures of propylene oxide and oligomeric isocyanate (Guevera and Moslemi, 1983). The best treatment was found to be a mixture of 9 1 propylene oxide to isocyanate. In another study, Guevera and Moslemi (1984) studied the swelling properties of wood modified with propylene or butylene oxide and compared the data with modifications using a furan resin, or vinylpyrrolidinone. The best results were obtained by the use of alkylene oxides in combination with a cross-linking agent (trimethylol propane trimethacrylate). 

In the next step, an excess of cross-linking monomer (e.g. trimethylol-propane trimethacrylate or ethylene glycol dimethacrylate) is added together with an initiator (e.g. 2,2 -azoisobutyronitrile), which induces the polymerisation process. Under nitrogen and high temperature, the polymerisation process results in the formation of a rigid mass of polymer. 

Trimethylol propane triacrylate Trimethylol propane trimethacrylate Tetramethyl thiuram disulphide Total correlation spectroscopy Time-of-flight MS Thermoplastic elastomer(s)... 

METHACRYLIC SYSTEM. Methyl methacrylate purchased from Merck and 1,1,1-trimethylol propane trimethacrylate (TRIM) supplied by Degussa, used as crosslinker, were dried over molecular sieves but not otherwise purified, so that they still contained 15 ppm and 100 ppm methylethylhydroquinone, respectively. The initiator of radical polymerization was azobisisobutyronitrile (AIBN). 

Similar studies have been carried out by the groups of Schmid et al. [39] and Reinholdsson and co-workers [40,41] for the polymerisation of trimethylol propane trimethacrylate (TRIM) using toluene as solvent and iso-octane as nonsolvent. 

Data are presented in Table III for the polymerization of basswood-MM A-trimethylol propane trimethacrylate (TMPTMA) impregnated samples containing 0.25% vazo catalyst. The melting point of the three-dimensional polymer is raised by adding TMPTMA to... 

Several studies look at the crosslinking of PVC compounds containing CaCO,. Exposure of a PVC compound to y-radiation will change its properties. Properties affected include tensile strength and Young modulus which are increased and elongation which is decreased. Figure 11.1 shows that the presence of calcium carbonate had minimal influence on crosslink density. Similarly, calcium carbonate did not influence the performance of the crosslinker (trimethylol propane trimethacrylate). 

The most common acrylic polymer is polymethyl methacrylate, which is obtained by polymerization of methyl methacrylate (MMA). The material consists of a highway-grade aggregate and a matrix produced by cross-linking MMA with trimethylol propane trimethacrylate or other polyfunctional acrylic oligomers. 

The second kind is that of polyfunctional agents that could promote cross-linking (against chain scissioning). Trimethylol propane trimethacrylate (TMPTMA), trimethylol propane triacrylate (TMPTA) or triallyl isocyanurate (TAIC) belong to this category (Figure 9.3). 

Chemicals Poly(vinyl alcohol), 2-hydroxyethyl methacrylate and maleic anhydride were perchased from Merck-Schuchardt (Germany). The average molecular weight of poly (vinyl alcohol) used is about 72,000. The cross-linker, 1,1,1-trimethylol propane trimethacrylate and initiator, 2,2-diethoxyacetophenone, were obtained from TCI (Kasei, Tokyo, Japan). All chemicals used in this experiment are of reagent grade. 

The most important method for the synthesis of star polymers by GTP involves the use of a diftmctional monomer either as an arm-first or as a core-first approach. Usually, EGDM is used as the difunctional monomer. However, other multifunctional monomers, such as tetramethylene glycol dimethacrylate, trimethylol propane trimethacrylate, and 1,4-butylene dimethacrylate have been used. 

Methyl methacrylate Ethyl methacrylate Ethyl acrylate 2-Hydroxyethyl acrylate Butyl methacrylate Isobutyl methacrylate Methacrylic acid Tetrahydrofurfuryl methacrylate Ethylene glycol dimethacrylate Diethylene glycol dimethacrylate Triethylene glycol dimethacrylate Trimethylol propane trimethacrylate Urethane methacrylate Tripropylene glycol acrylate... 

Suppose, however, that glycerol is used as the cross-linker in the synthesis of a polyester. Then the functionality of the cross-link site will be 3. Use of trimethylol propane trimethacrylate or pentaerythritol tetramethacrylate results in functionalities of 6 and 8, respectively (66). 

The mechanism of the reaction is first an abstraction of a hydrogen atom from the polymer chain, leading to the formation of a reactive radical site [6]. Then two polymer radicals can combine, which results in a polymer network. The network formed by those reactions is very irregular, fn order to improve the network the addition of compounds with multiple double bonds, for example, triaUyl cyanurate (TAG), triallyl isocyanurate (TAIC), trimethylol propane trimethacrylate (TMPTA), or ethylene dimethaciylate (EDMA) is necessary [6]. They are often referred to as activators. The effect is described as an addition to the radical site at the polymer chain and transfer of the radical to the activator. The network is formed by reaction of the transferred radical with another chain. 

T 1. Polysulfide mbber, see also OT, TR TMPT Trimethylol propane trimethacrylate... 

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