Poly methyl metacrylate

Figure 7 shows the quadratic Stark spectrum of a poly(methyl metacrylate) film doped with a azobenzene-linked amphiphile, 4-octadecyloxy-4 -nitroazobenzene. Using eq. (5) and the most characteristic spectral point on the AT/T curves, where dD/dX = 0 and d2D/dXa = 0, the value of Ap was evaluated to be 5.4 debye. Further, the p value of the azobenzene-linked amphiphile was calculated to be 24 x 10 30 esu at a fundamental wavelength of 1064 nm. The p values of azobenzene-linked amphiphiles employed in this study were evaluated by the procedure mentioned here. The values are listed in Table 2 in the section 1.1.1. 

Scheme 48 Synthesis of a-amine poly(methyl metacrylate)...

The photoisomerization of the push-pull azobenzene derivative disperse red 1 (DRl) has also been shown recently to occur efficiently in poly-(methyl metacrylate) (PMMA) thin films at room temperature [23,24]. DRl is a pseudo-stilbene type azobenzene molecule, as classified by Rau. This means that the high-energy n-n transition is overlapping the low energy n-n transition, which leads to a large structureless band in the trans isomer and... 

Poly(methyl metacrylate) containing cis-l,2-diciano-l,2-bis(2,4,5-trimethyl-3-thienyl)ethene (B1536) was used as a photochromic optical memory medium. Figure 16.9 shows the chemical structures of B1536 and the absorption spectra of two isomers. 

Preparing blends — that is, mixtures — is one of the ways in which researchers try to optimize the properties of polymeric products. Among the principal properties described in patents of such materials are resistance to impact, ease of processing and tensile strength. In an attempt to maximize the tensile strength of blends of poly(vinylidene fluoride), poly(methyl metacrylate) and polystyrene — PVDF, PMMA and PS, respectively — Siqueira et al. (1993) obtained the results in Table 7A.3. The first 16 runs in the table correspond to a simplex centroid design with 9 replicate measurements, whereas in runs 17-20 the PVDF PS proportion is maintained equal to 1, and the quantity of PMMA is varied. 

Poly(methyl metacrylate) 2) Low-density polyethylene 3) Polystyrene... 

Yun YH, Hwang KJ, Wee YJ, Yoon SD (2011) Synthesis, physical properties, and charactCT-ization of starch-based blend films by adding nano-sized Ti02/poly(methyl metacrylate-co-acrylamide). J Appl Polym Sci 120 1850-1858... 

Fig. 4. XPS high resolution spectrum of Cls of Poly (methyl metacrylate) (PMMA). The four components correspond to C-H, C-C, C-0, and C=0 functional groups of PMMA after [9]...

Silicon dioxide (Si02), also known as silica nanoparticles are widely used as nanofillers in different polymeric systems. The particular interest in SiOa is due to commercial availability of several types with different surface area and porosity, their thermal stability and the transparency of obtained nanocomposites [1], including polycarbonate and poly(methyl metacrylate) modified with nano-Si02 to mention just a few [2,3]. Another important aspect is arising from improved rheological and mechanical properties as well as control of the morphology and phase separation [4]. 

Poly(methyl metacrylate)-co (methacrylic acid) [(.jj --pCH, COOR R= H or CH3 n Medical implants, enteric coatings in tablets... 

So far, the tacticity effect on polymer mixtures has been investigated mainly for the special systems where hydrogen bonding interaction is dominant, such as poly (vinyl chloride)/poly(methyl metacrylate) (PVC/PMMA) [1] or poly-styrene/poly(vinyl methyl ether) (PS/PVME) [2] mixtures. However, recently, there has been an interest in the effect of tacticity on polymer mixtures without specific interaction such as polyolefin/polyolefin [3] or polystyrene/ deuterated polystyrene mixtures [4,5]. 

Table 8 shows the effect of pulling velocity on die tensile, flexural and impact strength of pultruded glass fiber (75% w/w) reinforced poly (methyl metacrylate) composites (36). 

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