Frequency-modulation saturation spectroscopy of molecular iodine hyperfine structure near 640 nm with a diode laser source

In a frequency-modulation spectroscopy experiment, using the radiation from a single frequency diode laser, the spectra of molecular iodine hyperfine structure near 640 nm were recorded on the transition $B^3\Pi_{0_u^{+}}-X^1\Sigma^+_{g}$. The frequency reference given by the value of the modulation frequency (12.5 MHz in given experiment) allows determination of the frequency differences between hyperfine components with accuracy better than 0.1 MHz using the fitting procedure in experiment with only one laser.Comment: 3 pages, 3 figure

Method for increasing adhesive properties in composite materials based on veneer and thermoplastics

The article discusses the creation of laminated composite materials based on wood veneer using polyolefin films as a binder. The problems of combining components that differ in nature are presented. Goals for creating composite materials are achieved by modifying the polymer binder. The adhesion properties of measuring the contact angle and adhesive strength, were assessed and defined by their dependence on the concentration of modifying agent

The study of physical-mechanical properties of secondary drop-in systems

Currently, the problem of waste plastics recycling gains relevance not only from the standpoint of environmental protection, but also due to the fact thatthe shortage of raw polymer plastic waste becomes a powerful raw materials and energy. Among the large place occupied by waste drop-in polymer systems comprising two or more polymers. To improve the quality characteristics of such mixtures and products from them, they added compatibilizers. This process allows for compatibility of the components, thereby reliably ensured riding components miscibility and high thermo-mechanical properties of the material