| Autor: |
Salakhov II; PJSC NIZHNEKAMSKNEFTEKHIM, Nizhnekamsk, Sobolekovskaya 23, 423574 Republic of Tatarstan, Russia., Chalykh AE; Frumkin Institute of Physical chemistry and Electrochemistry, Russian Academy of Sciences (IPCE RAS), Leninskiy Prospekt, 31, 119071 Moscow, Russia., Shaidullin NM; PJSC NIZHNEKAMSKNEFTEKHIM, Nizhnekamsk, Sobolekovskaya 23, 423574 Republic of Tatarstan, Russia., Shapagin AV; Frumkin Institute of Physical chemistry and Electrochemistry, Russian Academy of Sciences (IPCE RAS), Leninskiy Prospekt, 31, 119071 Moscow, Russia., Budylin NY; Frumkin Institute of Physical chemistry and Electrochemistry, Russian Academy of Sciences (IPCE RAS), Leninskiy Prospekt, 31, 119071 Moscow, Russia., Khasbiullin RR; Frumkin Institute of Physical chemistry and Electrochemistry, Russian Academy of Sciences (IPCE RAS), Leninskiy Prospekt, 31, 119071 Moscow, Russia., Nifant'ev IE; A.V.Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences (TIPS RAS), Leninsky Prospekt 29, 119991 Moscow, Russia., Gerasimov VK; Frumkin Institute of Physical chemistry and Electrochemistry, Russian Academy of Sciences (IPCE RAS), Leninskiy Prospekt, 31, 119071 Moscow, Russia. |
| Abstrakt: |
The compositions based on bimodal high-density polyethylene (HDPE, copolymer of ethylene with hexene-1) and in mixture with monomodal tercopolymer of ethylene with butene-1/hexene-1 (LLDPE, low-density polyethylene) have been studied. Phase equilibrium, thermodynamic parameters of interdiffusion in a wide range of temperatures and ratios of co-components were identified by refractometry, differential scanning calorimetry, optical laser interferometry, X-ray phase analysis. The phase state diagrams of the HDPE-LLDPE systems were constructed. It has been established that they belong to the class of state diagrams of "solid crystal solutions with unrestricted mixing of components". The paired parameters of the components interaction and their temperature dependences were calculated. Thermodynamic compatibility of α-olefins in the region of melts and crystallization of one of the components has been shown. The kinetics of formation of interphase boundaries during crystallization of α-olefins has been analyzed. The morphology of crystallized gradient diffusion zones has been analyzed by optical polarization microscopy. The sizes of spherulites in different areas of concentration profiles and values of interdiffusion coefficients were determined. |
