Tert-butyl methacrylate

Highly branched poly(methacryhc acid) was synthesized by SCVCP of tert-butyl methacrylate with the inimer 12 via GTP, followed by hydrolysis [28]. Acid-catalyzed hydrolysis of the ferf-butyl groups and neutralization with NaOH produced a water-soluble, highly branched poly(sodium methacrylate). 

Polystyrene-fc-poly(2-vinylpyridine)-fc-poly(tert-butyl methacrylate). 144... 

DENDRIGRAFT (ARBORESCENT)-POLY(STYRENE)-GRAFT-POLY(2-VINYLPYRIDINE) AND POLY(STYRENE)-GRAFT-POLY(TERT-BUTYL METHACRYLATE) COPOLYMERS... 

The poly(vinylpyridine) and poly(tert-butyl methacrylate) copolymers can easily be converted to either cationic or anionic polyelectrolytes by protonation of the pyridine rings or by base hydrolysis of the tert-butyl ester units, respectively. The highly branched structure of the molecules, in combination with the polyelectrolyte effect, should confer useful properties to these materials in solution for applications such as pH-sensitive reversible gels. 

Table 9.7 Characterization data for arborescent polystyrene-gra/t-poly(tert-butyl methacrylate) copolymers (Adapted from ref. 17)...

C02CH2CH(CH3)2 - poly(Isobutyl methacrylate) (PIBM) C02C(CH3)3- poly(tert-butyl methacrylate) (PTBM) CO2CH2CCI3- poly(trichloroethyl methacrylate) (PTCEM) CO2CH2CF2 poly(trifluoroethyl methacrylate) (PTFEM) C02CH(CF3)2 poly(hexafluoroisopropyl methacrylate)(PHFIM) CN - poly(methacrylonitrile)(PMCN)... 

Fig. 2. Polymerizations of tert-butyl methacrylate ( BMA) (A) and methyl methacrylate (MMA) (B) initiated with (TPP)AlMe (1, X=Me) [monomer]o/[l (X=Me)]o=100, [1 (X= Me)]o=17.8 (A) and 19.6 (B) mM, CH2CI2 as solvent, room temperature. Effect of trimethy-laluminum (Me3Al) ([Me3Al]o/[2]o=3.0) on the rate of polymerization...

A review is given on the kinetics of the anionic polymerization of methyl methacrylate and tert.-butyl methacrylate in tetrahydrofuran and 1,2-dimethoxy-ethane, including major results of the author s laboratory. The Arrhenius plots for the propagation reaction+are linear and independent of the counterion (i.e. Na, Cs). The results are discussed assuming the active centre to be a contact ion pair with an enolate-like anion the counterion thus exhibiting little influence on the reactivity of the carbanion. 

A conbination of these results with those of honopolymerization kinetics allows the relative reactivity of the active centres to be estimated. In the case of tert.-butyl methacrylate it was shown that the tert.-butyl group not only decreases the reactivity of the monomer but also that of the polymer (38). 

Using tert.-butyl methacrylate as the monomer, no termination has been detected even at ambient temperature (38). 

The involvement of the carbonyl group is shown indirectly by the lack of termination in the polymerization of tert.-butyl methacrylate (38). The positive inductive effect of the tert.-butyl group decreases the carbonyl activity and hence the termination rate constant. 

N. Martinez-Castro, M.G. Lanzendorfer, A.H.E. Muller, J.C. Cho, M.H. Acar, and R. Faust, Polyisobutylene stars and polyisobutylene-block-poly(tert-butyl methacrylate) block copolymers by site transformation of thiophene end-capped polyisobutylene chain ends, Macromolecules, 36(19) 6985-6994, September 2003. 

METHACRYLIC ACID AND DERIVATIVES] (Vol 16) tert-Butyl methacrylate [585-07-9]... 

The supramolecular structure of block co-polymers allows the design of useful materials properties such as polarity leading to potential applications as second-order nonlinear optical materials, as well as piezo-, pyro-, and ferroelectricity. It is possible to prepare polar superlattices by mixing (blending) a 1 1 ratio of a polystyrene)-6-poly(butadiene)-6-poly-(tert-butyl methacrylate) triblock copolymer (SBT) and a poly (styrene)-Apoly (tert-butyl methacrylate) diblock copolymer (st). The result is a polar, lamellar material with a domain spacing of about 60 nm, Figure 14.10. 

Methyl acrylate Methyl methacrylate n-Butyl methacrylate Tert. butyl methacrylate Bulk Bulk, benzene Bulk k. 

The group of Abetz [77] used polystyrene-fcZocA -poly(l,2-butadiene)-block-polyitert-hutyl methacrylate) triblock copolymers with partially hydrolyzed poly(tert-butyl methacrylate) blocks, together with polystyrene-... 

Fig.5 TEM micrographs of a polystyrene-Z7/oc/c-poly( 1,2-butadiene)-Z7/oc/c-poly(tert-butyl methacrylate) triblock copolymer that is 18% hydrolyzed and polystyrene-Z /oc/c-poly(2-vinylpyridine) diblock copolymer. S denotes polystyrene, V denotes poly(2-vinylpyridine), T/A denotes the partially (18%) hydrolyzed poly(tert-butyl methacrylate), and B denotes poly( 1,2-butadiene). Reprinted with permission from [77]. 2003 American Chemical Society...

C8H1402 tert-butyl methacrylate 585-07-9 405.15 34.851 1,2 14708 C8H1404 ethylene glycol diglycidyl ether 2224-15-9 495.09 43.413 2... 

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