PMID- 30960587 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20200930 IS - 2073-4360 (Electronic) IS - 2073-4360 (Linking) VI - 11 IP - 4 DP - 2019 Apr 2 TI - Durability of Basalt/Hemp Hybrid Thermoplastic Composites. LID - 10.3390/polym11040603 [doi] LID - 603 AB - The Achilles heel of thermoplastic natural fibre composites is their limited durability. The environmental degradation of the mechanical properties of hemp and hemp/basalt hybrid-reinforced high-density polyethylene (HDPE) composites has been investigated with a special focus on the effects of water ageing and accelerated ageing, including hygrothermal and UV radiation. Modification of the matrix was carried out using a maleic anhydride high-density polyethylene copolymer (MAPE) as a compatibilizer. Hybridization of hemp fibres with basalt fibres and the incorporation of MAPE were found to significantly decrease the water uptake (up to 75%) and increase the retention of mechanical properties after accelerated ageing. Secondary crystallization phenomena occurring in the composites, as confirmed by differential scanning calorimetry (DSC) analysis, were able to counteract the severe combined effects of hygrothermal stress and UV radiation, with the exception of hemp-fibre composites where permanent damage to the fibres occurred, with 2% and 20% reduction in tensile strength and modulus, respectively, for a 30 wt % hemp fibre-reinforced HDPE. FAU - Sergi, Claudia AU - Sergi C AD - Department of Chemical Engineering Materials Environment, Sapienza-Universita di Roma and UdR INSTM, Via Eudossiana 18, 00184 Roma, Italy. claudia.sergi@uniroma1.it. FAU - Tirillo, Jacopo AU - Tirillo J AD - Department of Chemical Engineering Materials Environment, Sapienza-Universita di Roma and UdR INSTM, Via Eudossiana 18, 00184 Roma, Italy. jacopo.tirillo@uniroma1.it. FAU - Seghini, Maria Carolina AU - Seghini MC AD - Department of Chemical Engineering Materials Environment, Sapienza-Universita di Roma and UdR INSTM, Via Eudossiana 18, 00184 Roma, Italy. mariacarolina.seghini@uniroma1.it. FAU - Sarasini, Fabrizio AU - Sarasini F AD - Department of Chemical Engineering Materials Environment, Sapienza-Universita di Roma and UdR INSTM, Via Eudossiana 18, 00184 Roma, Italy. fabrizio.sarasini@uniroma1.it. FAU - Fiore, Vincenzo AU - Fiore V AD - Department of Engineering, University of Palermo, Viale delle Scienze, 90128 Palermo, Italy. vincenzo.fiore@unipa.it. FAU - Scalici, Tommaso AU - Scalici T AUID- ORCID: 0000-0003-3703-1890 AD - Department of Engineering, University of Palermo, Viale delle Scienze, 90128 Palermo, Italy. T.Scalici@qub.ac.uk. AD - School of Mechanical and Aerospace Engineering - Queen's University Belfast, Ashby Building, Stranmillis Road, Belfast, BT9 5AH, UK. T.Scalici@qub.ac.uk. LA - eng GR - No 741477/Sapienza Universita di Roma/ PT - Journal Article DEP - 20190402 PL - Switzerland TA - Polymers (Basel) JT - Polymers JID - 101545357 PMC - PMC6523148 OTO - NOTNLM OT - basalt fibres OT - durability OT - environmental degradation OT - hemp fibres OT - hybrid OT - natural fibres OT - polymer-matrix composites COIS- The authors declare no conflict of interest. EDAT- 2019/04/10 06:00 MHDA- 2019/04/10 06:01 PMCR- 2019/04/02 CRDT- 2019/04/10 06:00 PHST- 2019/02/19 00:00 [received] PHST- 2019/03/22 00:00 [revised] PHST- 2019/03/27 00:00 [accepted] PHST- 2019/04/10 06:00 [entrez] PHST- 2019/04/10 06:00 [pubmed] PHST- 2019/04/10 06:01 [medline] PHST- 2019/04/02 00:00 [pmc-release] AID - polym11040603 [pii] AID - polymers-11-00603 [pii] AID - 10.3390/polym11040603 [doi] PST - epublish SO - Polymers (Basel). 2019 Apr 2;11(4):603. doi: 10.3390/polym11040603.