Øget performance af termoplast
via materiale-modifikation
Torsdag d. 29. september 2005 i Odense
28/9 - Sidste nyt: Afbud fra Aleksey D. Drozdov - Det har ikke været muligt at skaffe erstatning for dette indlæg.
Det er temadagens formål at give deltagerne et bredere kendskab til nye materialetyper og metoder, der bl.a. forbedrer plastmaterialers egenskabsprofil, herunder mekaniske og termiske egenskaber.
I kraft af den stigende udbredelse i anvendelsen af plast og kompositte materialer til applikationer med krævende kravprofiler, er der efterhånden behov for materialer med specielle egenskaber for at opfylde kravene til disse komponenter.
Seminaret vil afdække en lang række specielle materialer og metoder, der kan forøge de nævnte egenskaber. Der vil i seminaret blive lagt speciel vægt på materialer, der i syntesen bliver krydsbundne eller ved efterfølgende processer bliver modificerede i deres molekylstrukur eller morphologi, således, at de opnår specielle egenskaber.
Seminaret vil både afdække området i dybden, men også vise problemstillingen via cases.
Målgruppe: F.eks.Materialespecialister, konstruktører, producenter/fabrikanter.
PROGRAM
Networks of cross-linked and entangled chains: physical concepts and constitutive models
Aleksey D. Drozdov, Professor, Ben-Gurion University, Israel. AFBUD!!!!!!!
DET HAR IKKE VÆRET MULIGT MED SÅ KORT VARSEL AT SKAFFE EN ANDEN FOREDRAGSHOLDER (indsat 28. september kl. 19:30)
The talk is concerned with the so-called non-classical theories of polymer networks and their application to the analysis of the mechanical response of solid polymers. A brief description is provided of modern concepts of networks with (physical and chemical) cross-links and entanglements (knots) between macromolecules. Some novel approaches are exposed to modelling the elastic, viscoelastic and elastoplastic behaviour of polymer networks. The ability of the corresponding stress-strain relations to describe and predict the response of elastomers, semi-crystalline polymers and polymer composites (including hybrid nano-composites) is discussed in detail.
Aleksey D. Drozdov:
M.Sc. in Mechanical Engineering (Moscow University, 1975), Ph.D. in Mechanical Engineering (Moscow University, 1979),
D.Sc. in Material Science (Moscow University, 1989).
Present position: Professor, Department of Chemical Engineering, Ben-Gurion University, Beer-Sheva, Israel.
Research area: Mechanics of polymers and polymer composites.
Author of 7 books and about 200 research papers.
10:30-11:00
Crosslinkable PBT -- Vestodur Cl - for SMD- and MID technology
Uwe Kannengiesser, New Polymers, and Göran Winnerstam, Degussa AG
Various applications in the electrical engineering, sensor and medical technology require materials with a short-term heat resistance because of new production techniques such as surface mounted electronic devices (SMD) or 3-D molded interconnect devices (3-D MID).
Up to now established materials that satisfied these requirements were nearly without exception very expensive high-temperature polymers. They have different shrinkage and processing characteristics than standard compounds and can therefore not be processed with the same tools. In addition, injection molding of HT polymers generates a high energy consumption needed to achieve the necessary high melt and mold temperatures.
Bearing that in mind High Performance Polymers has been developing crosslinkable PBT compounds that briefly withstand temperatures up to 400°C, with the usual property profile of PBT remaining intact. Performance of grades, suiatble for other branches will be discussed as well.
Dipl. Physik Engineer, Uwe Kannengießer, born 1960 is a member of technical marketing team with High Performance Polymers (HPP) of Degussa AG since 1996 in Marl. Responsible for industry coordination of applications in electrical and cable industry in department HPP-CRM. Göran Winnerstam is Regional Manager of the Nordic Area.
11:15-11:45
Crosslinking of polymers by irradiation
Joachim Gehring, Dipl.Ing., BGS Beta-Gamma-Service GmbH&Co.KG
The most important application of the radiation technology are the crosslinking
of polymers and the sterilization. Although extensive experience about the use
of this technology is available and powerful and dependable radiation facilities
can be obtained, as yet the radiation technology has not found the acceptance it
deserves in the industry. Practical examples of running applications will be
presented and also the way of the irradiation process.
Educated at FHS Aachen Joachim Gehring holds a degree as a Dipl. Engineer
in chemistry. Since more then 30 years he is working in the plastic industry, first with Bayer Leverkusen, then 8 years with General Electric Plastics. 1984 he joined BGS
Beta-Gamma-Service and holds now the position of Sales and Marketing Director.
11:45-12:15
Potentials of radiation cross-linked thermoplastics for circuit carriers
Zenata Brocka, Dipl.-Ing., Institute of Polymer Technology, University of Erlangen - Nuremberg
The cross-linking of plastics features a very effective method for the modification of properties of engineering thermoplastics particularly in regard towards the current lead problem and temperature load within the soldering process for the production of 3D-MIDs. By post-crosslinking with an electron beam, it is possible to prevent engineering thermoplastics e.g. PA or PBT from softening or alternatively melting when used as circuit carriers in MID applications, since the polymer molecules are linked into a network. A purposeful improvement in the soldering stability is the result. At the same
time, the adhesive strength of metallic circuit traces and/or of plastic-plastic interconnection is increased.
The presentation offers an overview of the potentials of radiation cross-linked thermoplastics for MID applications. Due to cross-linking in particular the thermal-mechanical properties are shifted into a range, which enables the employment of this substrate for soldering at elevated temperatures.
Besides, the investigations show, that cross-linked engineering thermoplastics have fundamentally better long-time properties.
Zaneta Brocka graduated 1999 with diploma thesis in the topic “Influence of organic laminate materials in technological production processes on the environment” at the Polymer Institute at the Szczecin University of Technology (Poland). Jan-Jun/2000 – guest scientist at the Institute of Polymer Technology, University of
Erlangen-Nuremberg. Since July/2000 – research assistant at the Institute of Polymer Technology, University of Erlangen-Nuremberg under the advisorship of Professor Gottfried W. Ehrenstein in the Polymer in the Electronic division. Main research topics: Cross-linking of polymers by means of electron irradiation, thermal and chemical application limits and long-term properties.
Inger-Margrete Procida, civilingeniør, NKT Flexibles I/S
The three commonly used methods will be examined and differences highlighted.
Use of the different methods in water pipes and off shore pipes will be discussed.
Inger-Margrete Procida er uddannet civilingeniør, kemi. Hun har siden 1970 været ansat hos NKT i forskellige R&D afdelinger. Indtil år 2000 hos NKT Cables, de sidste år med fokus på udvikling af højspændingskabler. År 2000 hos NKT research og fra 2001 hos NKT Flexibles med fokus på udvikling af flexible rør til off shore industrien: Karakterisering, kvalificering og forbedring af polymermaterialer.
13:35-13:55
Helle Lund, kemiingeniør, Løgstør Rør
Logstor A/S (tidligere Løgstør Rør A/S) fremstiller præisolerede rørsystemer, hvor plastråvarerne typisk er PE, krydsbundet PE og PUR. Rørsystemerne anvendes både til fjernvarme, marine, industri og off-shore.
Der foregår løbende en udvikling af materialeegenskaber og igennem de sidste ca. 10 år har virksomheden benyttet krydsbindingsteknologien.
Case: Fremstilling af krydsbundne rør og muffer ved henholdsvis PE-Xb og PE-Xc hos Logstor. Herunder gennemgang af materialekrav, fordele og ulemper.
Helle Lund er uddannet Kemiingeniør, 1996. Har indtil år 2002 arbejdet indenfor emballagebranchen, og har de sidste 3 år været ansat hos Løgstør Rør A/S i afdelingen for Teknologi- og Procesudvikling. Projektleder for termoplast. Tester materialeegenskaber og fastlægger krav samt implementerer og optimerer råvarer og produkter. Procesteknisk back up i forbindelse med bl.a. fremstilling af krydsbundne rør og muffer.
13:55-14:25
Cyclics CBT Resin - A new class of Thermoplastic Polyesters improving their processing and performance
Jens Eggers, Account Manager, Cyclics Europe GmbH
The new Cyclics CBT® resins form a new class of thermoplastic Polyesters. The low molecular weight products melt to a water-like viscosity when heated and offer therefore substantial benefits in various processing options. They furthermore have the ability to polymerize into the tough engineering thermoplastic polybutylene terephthalate (PBT) in presence of a catalyst.
The main characteristics of the Cyclics product family are presented. Furthermore the processing of the material and associated opportunities in the key markets compounding, nanocomposites, casting, rotational molding, is explained. In addition the use of Cyclics CBT® Resin as functional additive, dispersion aid and carrier for colors and filler concentrates is highlighted.
Early 2004 Mr. Eggers joined Cyclics Europe GmbH a s an Account Manager to assist in commercializing a new high flow engineering thermoplastic known as CBT ® resin. Mr. Eggers is actively involved in the development of applications for customers directing product and process optimization. Mr. Eggers manages projects involving rotational molding, casting and extruder compounding and has plenty of practical experience in processing Cyclics CBT. Mr. Eggers graduated from Reutlingen University with a degree in Polymer Science.
14:45-15:15
Phenolic Moldable Composites, highly crosslinked engineering thermosets that can stand the heat
Dr. Albert Cardon, Senior Research Scientist
, Vyncolit n.v.
Due to their high crosslinking density, phenolics show better retention of mechanical-chemical, and tribological properties and creep, when measured at high temperature (>150°C). Dimensional stability in a broad temperature range will favor the use of glass fiber-mineral filled phenolics, where engineering thermoplastics fail. Industrial Applications for this are mainly found in the automotive industry.
Carbon fiber reinforced phenolics combine these high temperature properties with a low density, high wear resistance and low friction coefficient at high temperature and can lead to new application areas.
Tilrettelæggelse: Jørn Toftegaard Hansen, Grundfos A/S i samarbejde med Plastgruppen, ATV-SEMAPP.
Sted:
Scandic Odense, Hvidkærvej 22, 5250 Odense SV, tlf. +45 66 17 66 66, www.scandic-hotels.dk
Pris:
Medlemmer af ATV-SEMAPP: Kr. 1825,-. Øvrige: Kr. 2275,-.
For studerende, der er medlemmer af ATV-SEMAPP: DKK 250,- .
Prisen dækker gebyr og fortæring samt evt. udleveret materiale.
Der kan tegnes medlemskab i forbindelse med tilmelding (½ årskontingent for resten af 2005).
Tilmelding:
til Receptionen, IPL, IPU og ATV-SEMAPP, Tlf. 45 25 48 00, att. Grethe Lund Rasmussen / Michael Jensen, eller til Erling D. Mortensen, tlf. 45 25 46 30,
E-mail: semapp@ipl.dtu.dk , fax 45 93 45 70.
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