Methylmethacrylate-glycidyl methacrylate copolymer

Swaraj and Bengt [82] used infrared spectroscopy to determine epoxy groups in methylmethacrylate - glycidyl methacrylate copolymers. 

Table 3.10 Analytically determined mole fraction of glycidyl methacrylate (GMA) in the methylmethacrylate - glycidyl methacrylate copolymers and the infrared absorbance at 5.82 and 11.02 pm ...

Swaraj and Ranby used infrared spectroscopy to determine epoxy groups in methylmethacrylate - glycidyl methacrylate copolymers. The analysis was performed on dried potassium bromide pellets containing 0.5 mg sample in 200 mg potassium bromide. The peaks at the wavenumbers 907 (11.02 u) and 1717 cm (5.82 u) are the most suitable ones for analysis of epoxy and carbonyl groups respectively. Using the base line density method the values of the absorbances at 907 and 1717 cm" wavenumbers were determined. The average values of the absorbances, their ratio and the glycidylmethyl-acrylate mole fraction determined chemically are presented in Table 2.8. 

Carboxy-terminated nitrile rubber Elastomeric copolymer from ethylene and ethyl acrylate Ethylene-glycidyl methacrylate copolymer Copolymer from ethylene and methacrylic acid Copolymer from ethylene and methylmethacrylate... 

This technique has been used extensively for the determination of functional groups, in polymers and copolymers (Chapter 3) and in comonomer analysis (Chapter 4). Both these aspects are concerned with the determination of polymer structure. For example the distinction between free and combined vinyl acetate in vinyl chloride - vinyl acetate copolymers (Section 3.4.4) or the elucidation of the structure of methylmethacrylate (MMA) - glycidyl methacrylate copolymers (Section 3.6.1) or the elucidation of the various types of unsaturation occurring in styrene - butadiene copolymers (Sections 3.9.3, 3.9.4). Typical infrared (IR) spectra of copolymers are shown in Figures 6.1 to 6.4. 

Aaserud et al. [18] featured the use of ESI in conjunction with SEC. PMMA5270, a poly(methylmethacrylate) (PMMA) with a narrow MMD, and also a copolymer with units of glycidyl methacrylate (GMA) and butyl methacrylate (BMA) were analyzed. The spectra possess gorgeous resolution. Recently, a mathematical procedure known as maximum entropy data processing has been applied to size exclusion chromatography-electrospray ionization (SEC-ESI) [19,20]. 

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