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1

Właściwości fizykomechaniczne płyt z orientowanych wiórów pasmowych poddanych oddziaływaniu środowiskowych czynników starzeniowych

100%
Mirski R.
Rozprawy Naukowe. Uniwersytet Przyrodniczy w Poznaniu
|
2013
|
nr 456
2

The effect of variable environmental conditions on dimensional changes in thin wood-based materials. Part I. Absorption changes

100%
Mirski R.
Electronic Journal of Polish Agricultural Universities. Series Wood Technology
|
2009
|
tom 12
|
nr 4
3

The effect of variable environmental conditions on dimensional changes in thin wood-based materials. Part II. Desorption changes

100%
Mirski R.
Electronic Journal of Polish Agricultural Universities. Series Wood Technology
|
2010
|
tom 13
|
nr 3
4

Dimensional changes of OSB/3 and OSB/4 seasoned according to recommendations of standard PN-EN 318

100%
Mirski R.
Annals of Warsaw Agricultural University. Forestry and Wood Technology
|
2006
|
tom 59
5

Properties of particleboards glued with the phenolic resin modified by diethyl malonate

63%
Mirski R., Gotych V.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2008
|
tom 64
6
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Lightweight boards from wood and rape straw particles

63%
Dziurka D., Mirski R.
Drewno. Prace Naukowe. Doniesienia. Komunikaty
|
2013
|
tom 56
|
nr 190
The study investigates the properties of lightweight (350–550 kg/m3) particleboardsmade using wood or rape particles and with veneers applied to their surfaces. Their suitability for the production of furniture and elements of interior design isdiscussed. Panels with veneer on their faces were made using a “one shot” pressing cycle. It was found that rape particles may be used for the production of lightweight particleboards, and that they are a good alternative to wood chips. Particleboards made of rape straw, covered with beech veneer during the pressing cycle in order to strengthen their subsurface layers, have better properties than the corresponding wood-chip-based particleboards. However, all the boards, throughout the whole density range, meet the requirements for P2 boards, i.e. boards intended for interior decoration and furniture production (MOR 11 N/mm2, MOE 1600 N/mm2,IB 0.35 N/mm2 according to EN 312).
7

Properties of OSB subjected to the boiling test

63%
Mirski R., Derkowski A.
Acta Scientiarum Polonorum. Silvarum Colendarum Ratio et Industria Lignaria
|
2011
|
tom 10
|
nr 2
The aim of the study was to determine physico-mechanical properties of OSB subjected to the boiling test. The tests were conducted on OSB/3 and OSB/4 of 12, 15 and 22 mm in thickness, produced in the years 2002 and 2009. All tested boards were resinated in the core layers with PMDI, while in the face layers MUPF was applied. It results from the tests that OSB/3 of 15 mm in thickness and OSB/4 exhibit very high resistance to the boiling test and their high initial physico-mechanical parameters make it possible to satisfy the respective standards also after the test.
8
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

The effect of modification of phenolic resin with sodium oxalate and ethylene glycol on properties of particleboards

63%
Mirski R., Zawada L.
Folia Forestalia Polonica. Series B - Drzewnictwo
|
2011
|
tom 42
The study investigated the effect of the modification of phenolic resin with sodium oxalate and ethylene glycol on properties of particleboards. It results from the conducted tests that the simultaneous introduction of ethylene glycol and sodium oxalate to PF resin, irrespective of the amounts of modifiers, results in a slight increase in bend- ing strength and modulus of elasticity of particleboards. However, a strong decrease was observed in internal bond after the boiling test. Observed changes in properties of par- ticleboards, occurring under the influence of the applied modification, undermine the applicability of such a modification.
9

Substancje pochodzenia naturalnego jako substytut fenolu

63%
Banaszak A., Mirski R.
Aura
|
2016
|
nr 07-08
10

The effect of cyclic humidity changes on dimensional stability of core and outer layers in OSB/3

63%
Mirski R., Derkowski A.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2009
|
tom 69
11

Bending strength of OSB subjected to boiling test

63%
Mirski R., Derkowski A.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2010
|
tom 71
12

The effect of pressing time on properties of particleboards resinated with phenoi-formaldehyde resin modified with polyols

51%
Mirski R., Dziurka D., Lecka J.
Annals of Warsaw Agricultural University. Forestry and Wood Technology
|
2005
|
tom 57
The effect of pressing time on properties of particleboards resinated with phenol-formaldehyde resin modified with polyols. The study investigated the effect of modification of phenolic resin with polyols such as ethylene glycol, propylene glycol, butylene glycol and glycerol on the possibility to shorten pressing time for particleboards manufactured with the use of such modified PF resin. Tests showed that all types of polyols added to resin considerably improved physico-mechanical properties of manufactured boards. The application of butylene glycol or glycerol makes it possible to manufacture boards with good properties at pressing time shortened by 20%.
13
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Analiza jakościowa i wartościowa drewna dębowego w sprzedaży submisyjnej drewna cennego w RDLP w Katowicach

51%
Mirski R., Malinowski Z., Wieruszewski M.
Sylwan
|
2020
|
tom 164
|
nr 06
In special trade of the valuable wood raw material, in addition to system sales, the submission form is preferred. Increasing demand for high quality wood leads to an increase in market prices. Oak is that species that is devoted for the sale in the group of valuable wood in Poland. Oak timber have a number of features limiting their industrial significance. Its suitability is affected by quality and technical properties. The price level, which is a measure of the economic usefulness of wood, is affected by the share of defects and offered dimensions. The paper reviews the impact of not only the quality factor, but also indicates the correlation between the dimensional parameters of oak wood offered and the average sales prices of special raw material in the submission sales in the Regional Directorate of State Forests in Katowice. Attention was drawn to the influence of both the diameter of wood directed to trade at a constant log length. The paper presents the variability of oak wood prices, where a characteristic factor translating into an increase in the value of the raw material is undoubtedly the diameter of the logs of the valuable raw material.
14

Properties of particleboards glued with phenolic resin modified by esters with different substituents in acid alkyl group. Part III - Determining the possibility of decreasing pressing temperature

51%
Mirski R., Lecka J., Dziurka D.
Annals of Warsaw Agricultural University. Forestry and Wood Technology
|
2003
|
tom 53
15

Properties of alcohol-modified PF resin used in the production of wood-based materials

51%
Mirski R., Dziurka D., Lecka J.
Electronic Journal of Polish Agricultural Universities. Series Wood Technology
|
2005
|
tom 08
|
nr 2
16

The effect of modification of phenolic resin with alkylresorcinols and H2O2 on properties of plywood

51%
Dziurka D., Lecka J., Mirski R.
Acta Scientiarum Polonorum. Silvarum Colendarum Ratio et Industria Lignaria
|
2009
|
tom 08
|
nr 4
The study analysed the effect of modification of phenolic resin with alkylresorcinols and H2O2 on properties of softwood and hardwood plywood resinated with such modified PF resins. Conducted tests showed that the application of PF resin modified with alkylresorcinols makes it possible to manufacture plywood with improved properties, especially bond quality, than those of the control plywood pressed under identical conditions. In turn, the introduction of H2O2 both to pure PF resin and resin modified with alkylresorcinols improves properties of plywood as a result of enhanced reactivity and increased chemical adhesion of resin to wood. Moreover, applied PF resin modification methods make it possible to manufacture plywood with very good properties at pressing time reduced by 25%.
17

Properties of OSB glued with PMDI-modified PF resin

51%
Mirski R., Banaszak A., Kerber J.
Intercathedra
|
2015
|
tom 31
|
nr 4
The aim of this study was to investigate the applicability of PF-pMDI hybrid resins for the manufacture of OSBs. A three-layer OSBs were manufactured with the adhesive solution (PF-pMDI mixture), pMDI share in the adhesive solution was 0, 10, 25, 50, 75, 90 or 100%. The assessed properties of OSBs were: modulus of rigidity, modulus of elasticity (EN 310), internal bond (EN 319), tensile strength perpendicular to the plane of the board (EN 319), water resistance as per V-100 test (EN-1087-1), swelling after 24 hours (EN 317), as well the authors took into account the relation between the mixture price and resulting bending strength. On the basis of data the fallowing conclusions were drown: the partial substitution of PF resin with pMDI allows for manufacturing OSBs with better mechanical properties and changing their class from OSB/3 to OSB/4, the use of hybrid resin PF/pMDI significantly increases water resistance of the boards determined by the boiling test, addition of pMDI to PF resin does not markedly change physical and mechanical properties of OSBs but allows for reducing the cost of the adhesive mixture.
18

The effect of amounts of rape straw added to chips on properties of particle boards depending on the type of bonding agent

51%
Dukarska D., Dziurka D., Lecka J., Mirski R.
Electronic Journal of Polish Agricultural Universities. Series Wood Technology
|
2006
|
tom 09
|
nr 3
19

Wplyw modyfikacji zywic fenolowych na wlasciwosci plyt wiorowych

51%
Czarnecki R., Dukarska D., Lecka J., Mirski R.
Przemysł Drzewny
|
2003
|
tom 54
|
nr 04
7-8
20

The effect of polyethylene glycols on the possibility of shortening pressing time of particleboards bonded with phenol-formaldehyde resin

51%
Mirski R., Lecka J., Derkowski A.
Annals of Warsaw Agricultural University. Forestry and Wood Technology
|
2004
|
tom 55
The study investigated the effect of modifying phenolic resin with polyethylene glycols with varying molar masses on the possibility of shortening pressing time in particleboards produced with the use of modified PF resin. The applied resin modifiers were PEG 200, PEG 300 and PEG 400. The conducted tests showed that all the types of polyethylene glycols added to resin make it possible to produce particleboards with good properties at shortened pressing times. The most effective modifier was PEG 200, which made it possible to shorten pressing time by 20%.
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