scholarly journals Research and implementation of innovative technologies for the use of composite polymer materials to protect the root systems of seedlings from desiccation and increase their establishment

2021 ◽  
Vol 36 ◽  
pp. 04006
Author(s):  
V.V. Kopytkov ◽  
Ch. Dorzhsuren ◽  
Yu.A. Tairbergenov
Keyword(s):  
Physicochemical Properties ◽  
Polymer Material ◽  
Sodium Salt ◽  
Active Substance ◽  
Relative Viscosity ◽  
Mechanical Damage ◽  
Root Systems ◽  
Polymer Materials ◽  
Composite Polymer ◽  
Composite Polymer Material

In the presented materials, the physicochemical properties of composite polymer materials for protecting the root systems of forest seedlings from desiccation are studied. The conducted studies on the production of composite polymer materials allowed to establish their optimal ratios: the sodium salt carboxymethyl cellulose from 4 active substance wt.%, as target additives contains potassium chloride from 6.0 to 9.0 wt.% and ammonium nitrate from 0.004 to 0.006 wt.%. This ratio of target additives corresponds to the optimal relative viscosity of the composite polymer material equal to 170-175 s. Treatment of the root systems of seedlings with a composite polymer material allows not only to prevent desiccation, increase their establishment on the planting area, but also to reduce mechanical damage during transportation and forest planting.

scholarly journals Polymer gels for the protection of coniferous root systems from desiccation

2020 ◽  
Vol 64 (3) ◽  
pp. 379-384
Author(s):  
V. V. Kopytkov
Keyword(s):  
Survival Rate ◽  
Physicochemical Properties ◽  
Root Systems ◽  
Polymer Gels ◽  
Water Soluble ◽  
Polymer Materials ◽  
Moisture Loss ◽  
Composite Polymer ◽  
Water Soluble Polymers ◽  
Soluble Polymers

The results of the development of composite polymer materials for processing root systems of seedlings in order to increase the survival rate of forest crops are presented. It has been established that the type of target additives and the concentration of water-soluble polymers in the compositions for processing can significantly affect the physicochemical properties of the composites and moisture loss by root systems of seedlings. The optimal compositions of composite polymer materials for protecting the root systems of a number of conifers from drying out are given.

Effect of thermal shock loadings on stability of dentin-composite polymer material adhesive interfaces

2015 ◽  
Author(s):  
Nadezda O. Bessudnova ◽  
Olga A. Shlyapnikova ◽  
Sergey B. Venig ◽  
Andrey N. Gribov
Keyword(s):  
Thermal Shock ◽  
Polymer Material ◽  
Composite Polymer ◽  
Composite Polymer Material

scholarly journals Monte Carlo simulations of nanorod filler in composite polymer material

2019 ◽  
Vol 526 ◽  
pp. 012006 ◽  
Author(s):  
N Kerdkaen ◽  
T Sutthibutpong ◽  
S Phongphanphanee ◽  
S Boonchui ◽  
J Wong-ekkabut
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Polymer Material ◽  
Composite Polymer ◽  
Composite Polymer Material

Composite Polymer Coatings for Repair of Concrete Linings of Channels

2021 ◽  
Vol 410 ◽  
pp. 799-805
Author(s):  
Oleg A. Baev ◽  
Yuri M. Kosichenko ◽  
Aleksandr Yu. Garbuz
Keyword(s):  
Polymer Material ◽  
Water Permeability ◽  
Test Site ◽  
Polymer Coatings ◽  
Composite Polymer ◽  
Design Chart ◽  
Irrigation Channel ◽  
Composite Polymer Material ◽  
New Material ◽  
Concrete Coating

The paper is dedicated to the results of research on composite polymer material used for concrete casings repair. Field approbation of new material was carried out on the irrigation channel test site during the repair of concrete coating deformation joints and cracks. The paper provides the obtained theoretical formulae and results of water permeability calculation in concrete casing cracks with smooth and rough walls. A design chart for determining water permeability of damages in the form of cracks of various coating width on channel concrete coatings was obtained. A universal nomogram was obtained for determining the water permeability of damage in the form of cracks of various opening widths on the concrete coverings of channels.

scholarly journals Effects of Poloxamer Content and Storage Time of Biodegradable Starch-Chitosan Films on Its Thermal, Structural, Mechanical, and Morphological Properties

Polymers ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 2341
Author(s):  
Abril Fonseca-García ◽  
Carolina Caicedo ◽  
Enrique Javier Jiménez-Regalado ◽  
Graciela Morales ◽  
Rocio Yaneli Aguirre-Loredo
Keyword(s):  
Physicochemical Properties ◽  
Storage Time ◽  
Color Change ◽  
Pluronic F127 ◽  
Morphological Properties ◽  
Composite Polymer ◽  
Ambient Conditions ◽  
Composite Polymer Material ◽  
And Storage ◽  
Blend Polymer

Biodegradable packaging prepared from starch is an alternative to fossil-based plastic packaging. However, the properties of starch packaging do not comply with the necessary physicochemical properties to preserve food. Hence, in a previous study, we reported the preparation of a composite polymer material based on starch-chitosan-pluronic F127 that was found to be an adequate alternative packaging material. In this study, we modified the physicochemical properties of this material by storing it for 16 months under ambient conditions. The results indicate that the incorporation of pluronic F127 in the blend polymer can help avoid the retrogradation of starch. Moreover, at higher concentrations of pluronic F127, wettability is reduced. Finally, after storage, the materials exhibited surface modification, which is related to a color change and an increase in solubility, as well as a slight increase in stiffness.

Sign in / Sign up

Export Citation Format

Share Document