Hardness measurement as a technique for assessing gelation of rigid PVC compoundsCOVAS, J. A.Plastics and rubber processing and applications. 1988, Vol 9, Num 2, pp 91-97, issn 0144-6045Article

A miniature extrusion line for small scale processing studiesCOVAS, J. A; COSTA, P.Polymer testing. 2004, Vol 23, Num 7, pp 763-773, issn 0142-9418, 11 p.Article

Single screw extrusion of poly(vinyl chloride) : effect on fusion and propertiesCOVAS, J. A; GILBERT, M.Polymer engineering and science. 1992, Vol 32, Num 11, pp 743-750, issn 0032-3888Article

Multilayer plug concept to enhance thickness distribution control of deep thermoformed partsDUARTE, F. M; COVAS, J. A.Plastics, rubber and composites. 2008, Vol 37, Num 7, pp 293-300, issn 1465-8011, 8 p.Article

Infrared sheet heating in roll fed thermoforming. Part 2: Factors influencing inverse heating solutionDUARTE, F. M; COVAS, J. A.Plastics, rubber and composites. 2003, Vol 32, Num 1, pp 32-39, issn 1465-8011, 8 p.Article

The Plasticating Sequence in Barrier Extrusion Screws. Part II: Experimental AssessmentGASPAR-CUNHA, A; COVAS, J. A.Polymer-plastics technology and engineering (Softcover ed). 2014, Vol 53, Num 11-14, pp 1456-1466, issn 0360-2559, 11 p.Article

IR sheet heating in roll fed thermoforming. Part 1: Solving direct and inverse heating problemsDUARTE, F. M; COVAS, J. A.Plastics, rubber and composites. 2002, Vol 31, Num 7, pp 307-317, issn 1465-8011Article

Heating thermoplastic sheets for thermoforming solution to direct and inverse problemsDUARTE, F. M; COVAS, J. A.Plastics rubber and composites processing and applications. 1997, Vol 26, Num 5, pp 213-221, issn 0959-8111Article

The Plasticating Sequence in Barrier Extrusion Screws Part I: ModelingGASPAR-CUNHA, A; COVAS, J. A.Polymer engineering and science. 2014, Vol 54, Num 8, pp 1791-1803, issn 0032-3888, 13 p.Article

Helical flow during rotational pipe extrusionMARTINS, M. R; COVAS, J. A.Plastics, rubber and composites. 2006, Vol 35, Num 2, pp 59-66, issn 1465-8011, 8 p.Article

Non-conventional rheological monitoring of polymer processingMAIA, J. M; COVAS, J. A.Rheology conference. 1998, isbn 1-85957-148-4, Paper 7,1-Paper 7,6Conference Paper

Design and assessment of mandrel pipe diesCARNEIRO, O. S; COVAS, J. A.Plastics rubber and composites processing and applications. 1995, Vol 24, Num 2, pp 79-87, issn 0959-8111Article

Assessing the convergent flow analysis as a technique for characterizing the extensional flow of polyme meltsCOVAS, J. A; CARNEIRO, O. S.Polymer testing. 1990, Vol 9, Num 3, pp 181-194, issn 0142-9418, 14 p.Article

Continuous production of polycarbonate-carbon nanotube compositesCOVAS, J. A; BERNARDO, C. A; NIESZ, K et al.Journal of polymer engineering. 2005, Vol 25, Num 1, pp 39-57, issn 0334-6447, 19 p.Article

Evolution of peroxide-induced thermomechanical degradation of polypropylene along the extruderMACHADO, A. V; MAIA, J. M; CANEVAROLO, S. V et al.Journal of applied polymer science. 2004, Vol 91, Num 4, pp 2711-2720, issn 0021-8995, 10 p.Article

Effect of polyolefin structure on maleic anhydride graftingMACHADO, A. V; COVAS, J. A; VAN DUIN, M et al.Polymer (Guildford). 2001, Vol 42, Num 8, pp 3649-3655, issn 0032-3861Article

Monitoring polyolefin modification along the axis of a twin-screw extruder. II. Maleic anhydride graftingMACHADO, A. V; VAN DUIN, M; COVAS, J. A et al.Journal of polymer science. Part A. Polymer chemistry. 2000, Vol 38, Num 21, pp 3919-3932, issn 0887-624XArticle

Measuring uniaxial extensional viscosity using a modified rotational rheometerMAIA, J. M; COVAS, J. A; NOBREGA, J. M et al.Journal of non-newtonian fluid mechanics. 1999, Vol 80, Num 2-3, pp 183-197, issn 0377-0257Article

Designing extrusion dies for thermoplasticsCOVAS, J. A; CARNEIRO, O. S; BRITO, A. M et al.Journal of elastomers and plastics. 1991, Vol 23, Num 3, pp 218-238, issn 0095-2443Article

Synthesis, extrusion and rheological behaviour of PU/HA composites for biomedical applicationsMACHADO, H. B; CORREIA, Rui N; COVAS, J. A et al.Journal of materials science. Materials in medicine. 2010, Vol 21, Num 7, pp 2057-2066, issn 0957-4530, 10 p.Article

Evolution of the peroxide-induced degradation of polypropylene along a twin-screw extruder : Experimental data and theoretical predictionsBERZIN, F; VERGNES, B; CANEVAROLO, S. V et al.Journal of applied polymer science. 2006, Vol 99, Num 5, pp 2082-2090, issn 0021-8995, 9 p.Article

Design of calibrators for extruded profiles. Part I: Modeling the thermal interchangesNOBREGA, J. M; CARNEIRO, O. S; COVAS, J. A et al.Polymer engineering and science. 2004, Vol 44, Num 12, pp 2216-2228, issn 0032-3888, 13 p.Article

Monitoring the evolution of morphology of polymer blends upon manufacturing of microfibrillar reinforced compositesCOVAS, J. A; CARNEIRO, O. S; MAIA, J. M et al.International journal of polymeric materials (Print). 2001, Vol 50, Num 3-4, pp 445-467, issn 0091-4037Article

The influence of pellet-barrel friction on the granular transport in a single screw extruderMICHELANGELLI, O. P; GASPAR-CUNHA, A; COVAS, J. A et al.Powder technology. 2014, Vol 264, pp 401-408, issn 0032-5910, 8 p.Article

Effect of filler dispersion on the electromechanical response of epoxy/vapor-grown carbon nanofiber compositesFERREIRA, A; CARDOSO, P; KLOSTERMAN, D et al.Smart materials and structures. 2012, Vol 21, Num 7, issn 0964-1726, 075008.1-075008.9Article