Air permeability properties of cross laminated timberLuciani, Giovanni; Horta, R.; Kallakas, Heikko; Kers, JaanProceedings of the 12th Meeting of the Northern European Network for Wood Science and Engineering (WSE) : Wood Science and Engineering - a Key Factor on the Transition to Bioeconomy : September 12-13, 2016, Riga, Latvia2016 / p. 80 http://www.kki.lv/dokumenti/WSE2016.pdf Development of hemp hurd particleboards from formaldehyde-free resinsAlao, Percy Festus; Tobias, Micah Onyedikachi; Kallakas, Heikko; Poltimäe, Triinu; Kers, Jaan; Goljandin, DmitriAgronomy research2020 / p. 679–688 : ill https://doi.org/10.15159/AR.20.127 Journal metrics at Scopus Article at Scopus Development of hemp hurd particleboards from formaldehyde-free resinsAlao, Percy Festus; Tobias, Micah Onyedikachi; Kallakas, Heikko; Poltimäe, Triinu; Kers, Jaan; Goljandin, Dmitri11th International Conference Biosystems Engineering : May 6-8, 2020 in Tartu, Estonia : book of abstracts [Võrguteavik]2020 / p. 99 https://www.ester.ee/record=b5347289*est Durability of wood plastic composites : influence of weathering on the mechanical propertiesKallakas, Heikko; Poltimäe, Triinu; Süld, Tiia-Maaja; Kers, JaanProceedings of The Northern European Network for Wood Science and Engineering : Edinburgh, Scotland, 13-14 October 20142014 / p. 229 Effect of accelerated weathering on the mechanical properties of wood-plastic compositesKallakas, Heikko; Poltimäe, Triinu; Süld, Tiia-Maaja; Kers, JaanBaltic Polymer Symposium 2014 : programme and abstracts : Laulasmaa, Estonia, September 24-26, 20142014 / p. 75 Effect of birch false heartwood on the physical and mechanical properties of wood-plastic composites [Online resource]Kallakas, Heikko; Martin, Mihkel; Ayansola, Gbenga; Poltimäe, Triinu; Krumme, Andres; Kers, JaanTartu Ülikooli ASTRA projekt PER ASPERA : Funktsionaalsed materjalid ja tehnoloogiad : [7-8 märtsil 2018, Tallinn : teesid] GSFMT Scientific Conference 2018 : Tallinn, March 7-8, 2018 : abstracts2018 / 1 p http://fmtdk.ut.ee/teesid-2018/ Effect of chemical modification of wood flour on the mechanical properties of wood-plastic compositesKallakas, Heikko; Shamim, M. A.; Olutubo, T.; Poltimäe, Triinu; Süld, Tiia-Maaja; Krumme, Andres; Kers, JaanAgronomy research2015 / p. 639-653 : ill http://agronomy.emu.ee/vol133/13_3_2_B5.pdf Effect of chemical modification of wood flour on the mechanical properties of wood-plastic composites [Electronic resource]Kallakas, Heikko; Shamim, M. A.; Olutubo, T.; Poltimäe, Triinu; Süld, Tiia-Maaja; Krumme, Andres; Kers, Jaan6th International Conference Biosystems Engineering 2015 : 7-8 May 2015, Tartu, Estonia : book of abstracts2015 / p. 94. [CD-ROM] http://bse.emu.ee/BSE2015_Book%20of%20ABSTRACTS_ISBN.pdf Effect of different hardwood species and lay-up schemes on the mechanical properties of plywoodKallakas, Heikko; Rohumaa, Anti; Vahermets, Harti; Kers, JaanForests2020 / art. 649, 13 p. : ill https://doi.org/10.3390/f11060649 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS The effect of hardwood veneer densification on plywood density, surface hardness, and screw withdrawal capacityKallakas, Heikko; Kallakas, Heikko; Akkurt, Tolgay; Akkurt, Tolgay; Scharf, Alexander; Scharf, Alexander; Mühls, Fred; Mühls, Fred; Rohumaa, Anti; Rohumaa, Anti; Kers, Jaan; Kers, JaanForests2024 / art. 1275 https://doi.org/10.3390/f15071275 Effect of hemp fiber surface treatment on the moisture/water resistance and reaction to fire of reinforced PLA compositesAlao, Percy Festus; Marrot, Laetitia; Kallakas, Heikko; Just, Alar; Poltimäe, Triinu; Kers, JaanMaterials2021 / art. 4332, 17 p. : ill https://doi.org/10.3390/ma14154332 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Effect of hemp fibre length on the properties of polypropylene compositesAlao, Percy Festus; Kallakas, Heikko; Poltimäe, Triinu; Kers, JaanAgronomy research2019 / p. 1517–1531 : ill https://doi.org/10.15159/AR.19.146 Journal metrics at Scopus Article at Scopus Effect of hemp fibre length on the properties of polypropylene composites [Online resource]Alao, Percy Festus; Kallakas, Heikko; Kers, JaanTartu Ülikooli ASTRA projekt PER ASPERA : Funktsionaalsed materjalid ja tehnoloogiad : [4.-5. veebruar, 2019, Tartu : teesid]2019 / 1 p.: ill http://fmtdk.ut.ee/teesid-2019/ The effect of prestressing and temperature on tensile strength of basalt fiber-reinforced plywoodLõhmus, Rünno; Kallakas, Heikko; Tuhkanen, Eero; Gulik, Volodymyr; Kiisk, Madis; Saal, Kristjan; Kalamees, TargoMaterials2021 / art. 4701, 9 p. : ill https://doi.org/10.3390/ma14164701 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Effect of protein surface hydrophobicity and surface amines on soy adhesive strengthKallakas, Heikko; Plaza, Nayomi; Crooks, Casey; Turner, Derek; Gargulak, Mathew; Arvanitis, Matthew A.; Frihart, Charles R.; Hunt, Christopher G.Polymers2024 / art. 202 https://doi.org/10.3390/polym16020202 The effect of surface properties on bond strength of birch, black alder, grey alder and aspen veneersRohumaa, Anti; Kallakas, Heikko; Mäetalu, Marja; Savest, Natalja; Kers, JaanInternational Journal of Adhesion and Adhesives2021 / art. 102945 https://doi.org/10.1016/j.ijadhadh.2021.102945 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS The effect of wood flour fraction size on the properties of wood-plastic compositesKängsepp, Kärt; Poltimäe, Triinu; Liimand, K.; Kallakas, Heikko; Süld, Tiia-Maaja; Repeshova, Irina; Goljandin, Dmitri; Kers, JaanProceedings of the 9th International Conference of DAAAM Baltic Industrial Engineering, 24-26th April 2014, Tallinn, Estonia2014 / p. 366-371 Fiber-reinforced plywood: Increased performance with less raw materialSaal, Kristjan; Kallakas, Heikko; Tuhkanen, Eero; Just, Alar; Rohumaa, Anti; Kers, Jaan; Kalamees, Targo; Lõhmus, RünnoMaterials2024 / art. 3218 https://doi.org/10.3390/ma17133218 Fire and mechanical properties of hemp and clay boards for timber structuresKallakas, Heikko; Liblik, Johanna; Alao, Percy Festus; Poltimäe, Triinu; Just, Alar; Kers, JaanIOP conference series : earth and environmental science Central Europe towards Sustainable Building (CESB19) 2–4 July 2019, Prague, Czech Republic2019 / art. 012019, 8 p. : ill https://doi.org/10.1088/1755-1315/290/1/012019 Conference proceedings at Scopus Article at Scopus Impact of aspen and black alder substitution in birch plywoodAkkurt, Tolgay; Kallakas, Heikko; Rohumaa, Anti; Hunt, Christopher Glaab; Kers, JaanForests2022 / art. 142 https://doi.org/10.3390/f13020142 Impact of cracks to the hygrothermal performance of cross laminated timberKukk, Villu; Püssa, Martin; Kallakas, Heikko; Kers, JaanProceedings of the 12th Meeting of the Northern European Network for Wood Science and Engineering (WSE) : Wood Science and Engineering - a Key Factor on the Transition to Bioeconomy : September 12-13, 2016, Riga, Latvia2016 / p. 143 http://www.kki.lv/dokumenti/WSE2016.pdf Impact of cracks to the hygrothermal properties of CLT water vapour resistance and air permeabilityKukk, Villu; Horta, R.; Püssa, Martin; Luciani, Giovanni; Kallakas, Heikko; Kalamees, Targo; Kers, JaanEnergy procedia2017 / p. 741-746 : ill https://doi.org/10.1016/j.egypro.2017.10.019 Conference proceedings at Scopus Article at Scopus Article at WOS Impregnated wood performance in outdoor environmentTubli, Peeter; Kallakas, Heikko; Kers, Jaan; Brischke, C.; Humar, M.; Jones, D.Proceedings of the 12th Meeting of the Northern European Network for Wood Science and Engineering (WSE) : Wood Science and Engineering - a Key Factor on the Transition to Bioeconomy : September 12-13, 2016, Riga, Latvia2016 / p. 115-116 http://www.kki.lv/dokumenti/WSE2016.pdf The influence of accelerated weathering on the mechanical and physical properties of wood-plastic compositesKallakas, Heikko; Poltimäe, Triinu; Süld, Tiia-Maaja; Kers, Jaan; Krumme, AndresProceedings of the Estonian Academy of Sciences2015 / p. 94-104 : ill https://doi.org/10.3176/proc.2015.1S.05 https://artiklid.elnet.ee/record=b2716367*est The influence of birch (Betula pendula) false heartwood on the mechanical properties of wood-plastic composites = Kase (Betula pendula) väärlülipuidu mõju puitplastkomposiitide mehaanilistele omadusteleKallakas, Heikko2019 https://digi.lib.ttu.ee/i/?12253 Influence of birch false heartwood on the physical and mechanical properties of wood-plastic compositesKallakas, Heikko; Ayansola, Gbenga; Tumanov, Tanel; Goljandin, Dmitri; Poltimäe, Triinu; Krumme, Andres; Kers, JaanBioresources2019 / p. 3554-3566 : ill https://doi.org/10.15376/biores.14.2.3554-3566 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Introduction of the COST FP 1303 cooperative performance test [Electronic resource]Humar, M.; Brischke, C.; Kallakas, Heikko; Kers, JaanProceedings IRG Annual Meeting2015 / p. 1-22 : ill Investigation of efficient alkali treatment and the effect of flame retardant on the mechanical and fire performance of frost-retted hemp fiber reinforced PLAAlao, Percy Festus; Press, Raimond; Kallakas, Heikko; Ruponen, Jussi; Poltimäe, Triinu; Kers, JaanPolymers2022 / art. 2280 https://doi.org/10.3390/polym14112280 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Mechanical and physical properties of hemp fiber-mat reinforced polyethylene film compositesYang, Xuejian; Kallakas, Heikko; Kers, JaanBiocomp 2016 : the 13th Pacific Rim Bio-Based Composite Symposium, Bio-Based Composites for the Sustainable Future : November 14th to 16th, 2016, Concepcion, Chile : abstracts2016 / p. 91 : ill http://publicaciones.udt.cl/wp-content/uploads/2017/05/Abstracts-Biocomp-2016-2.pdf Mechanical and physical properties of industrial hemp-based insulation materialsKallakas, Heikko; Närep, Merili; Närep, Aivo; Poltimäe, Triinu; Kers, JaanProceedings of the Estonian Academy of Sciences2018 / p. 183–192 : ill https://doi.org/10.3176/proc.2018.2.10 https://artiklid.elnet.ee/record=b2861752*est Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Mechanical and physical properties of silane crosslinked wood flour reinforced compositesKallakas, Heikko; Shamim, M. A.; Poltimäe, Triinu; Süld, Tiia-Maaja; Krumme, Andres; Kers, JaanProceedings of the 11th Meeting of the Northern European Network for Wood Sciences and Engineering (WSE) : September 14-15, 2015, Poznan, Poland2015 / p. 278 Mechanical and physical properties of thermally modified wood flour reinforced polypropylene compositesKallakas, Heikko; Martin, Mihkel; Goljandin, Dmitri; Poltimäe, Triinu; Krumme, Andres; Kers, JaanAgronomy research2016 / p. 994-1003 : ill http://ise.elnet.ee/record=b2891902~S1*est Journal metrics at Scopus Article at Scopus Mechanical and physical properties of thermally modified wood flour reinforced polypropylene composites [Online resource]Kallakas, Heikko; Poltimäe, Triinu; Krumme, Andres; Kers, JaanTartu Ülikooli ASTRA projekt PER ASPERA : Funktsionaalsed materjalid ja tehnoloogiad : [7-8 märts 2017, Tartu : teesid]2017 / [1] p http://fmtdk.ut.ee/teesid/ Natural weathering of bio-based façade materialsAlao, Percy Festus; Visnapuu, Kevin; Kallakas, Heikko; Poltimäe, Triinu; Kers, JaanForests2020 / art. 642, 12 p. : ill https://doi.org/10.3390/f11060642 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Preparation of thermoplastic cellulose esters in [mTBNH][OAC] ionic liquid by transesterification reactionTarasova, Elvira; Savale, Nutan; Krasnou, Illia; Kudrjašova, Marina; Rjabovs, Vitalijs; Reile, Indrek; Vares, Lauri; Kallakas, Heikko; Kers, Jaan; Krumme, AndresPolymers2023 / art. 3979 https://doi.org/10.3390/polym15193979 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Properties of retted hemp fibres for reinforcement of compositesMarrot, Laetitia; Alao, Percy Festus; Kallakas, Heikko; Poltimäe, Triinu; Kers, Jaan; Mikli, Valdek; Mere, ArvoGSFMT Scientific Conference 2020 : Tallinn, February 4-5, 2020 : abstracts2020 / p. 13 : ill http://fmtdk.ut.ee/wp-content/uploads/2020/01/GSFMT2020.pdf Tensile and surface hydrophobicity investigation of the novel synthesized cellulose derivative filmsKallakas, Heikko; Kilumets, Catherine; Tarasova, Elvira; Krasnou, Illia; Savest, Natalja; Gudkova, Viktoria; Ahmadian, Iman; Krumme, Andres; Kers, JaanResearch Square2022 / 13 p https://doi.org/10.21203/rs.3.rs-2191830/v1 Tensile and surface wettability properties of the solvent cast cellulose fatty acid ester filmsKallakas, Heikko; Kattamanchi, Tanuj; Kilumets, Catherine; Tarasova, Elvira; Krasnou, Illia; Savest, Natalja; Ahmadian, Iman; Kers, Jaan; Krumme, AndresPolymers2023 / art. 2677 https://doi.org/10.3390/polym15122677 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Uued inimesed ja positsioonidDelpeche-Ellmann, Nicole Camille; Leoste, Janika; Kallakas, Heikko; Püüa, Margus; Spalatu, Nicolae; Reinsalu, KristoMente et Manu2024 / lk. 60-63 : fot https://www.ester.ee/record=b1242496*est