Definition

Description: Time needed by a chemical for permeating through a material. An important characteristic, e.g.

Description: A transponder is a transmitting unit with a defined frequency range. It is used

Description: Permeation tubes are small, inert tubes containing a chemical compund in its pure form.

Description: Diffusion is the mechanism causing microscopic particles from fluids or gases to spread out

Description: Chemistry means the science dealing with the structure and the behaviour of matter as

Description: A polymer is a chemical compund that consists of molecule chains (macromolecules). The process

Description: Permeation rate is a measurement for the amount of substance (permeate) permeating through a

Description: The process called facilitated diffusion takes place when a substance passes through a membrane

Description: Solvents are fluids that are able to contain gases, solids, and other fluids without

Description: Composites are materials consisting of several other materials, whereby all technical relevant properties are

Description: Technique for permeation rate measurement of a fluid through a film-like polymer. The material

Description: Coating that prevents a substance from permeating through a such protected surface. Materials whose

Description: Norming data sheet dealing with “Plastics – Film and sheeting – determination of the

Description: Functionalised polymers are chemical compounds composed of molecular chains (macromolecules) with funtionalised side chains.

Beschreibung: Norming data sheet dealing with “Plastics – Film and sheeting – determination of the

Description: A substance accelerating normally slow-running chemical or biochemical reactions is called catalyst. The catalyst

Description: ISO = International Organisation for Standardisation ISO is a network of the national standards

Description: Chemical compounds that produced by chemical methods are called chemicals. They are produced in

Description: Collective name for organic acrylic glasses composed of polymethacrylates, which are produced by polymerisation

Description: Specific temperature at which amorphous or partly crystalline polymers pass from the solid state

Description: The term “semipermeable” means half diaphanous. It is often used regarding membrane properties and

Usage: Floor covering, protective sealings, printed circuit boards, canvas, several material grades Category:Definition

Description: During a permeation rate measurement, the retentat is the depleated particle stream that leaves

Description: Fuels are materials emitting technically usable energy while they are burned.Examples for solid fuels:

Description: A permeation measurement cell is a testing unit for permeation rate measurements. The actual

Description: This process means the determining the composition of a certain material (in this case:

Descpription: An ion is an atom or molecule which carries a positive or a negative

Description: The diffusion coefficient characterises the thermal migration of molecules within a certain material.SI-Unit (m2/s).

Description: Basically, there are two methods usable for seperating gases: separation by membranes (view also:

Description: A hose consisting of several material layers. The material combination provides optimisation of permeation

Descpription: The word “hygroscopic” is a technical term used in chemistry and physics. Hygroscopic materials

Description: DIN = German Institute for Standardization (registered association) German institute, responsible for standardisation and

Description: Fuel cell technology is concerned with developing fuel cells for efficient production of energy.

Description: Multi-layer-foils are thermoplastic plaxtic films composed of two or more combined, different or similar,

Description: A polymer blend is a mixture of two or more polymeres. The polymers are

Descpription: The stream of particles migrating through a material during the permeation process is called

Descpription: Biotechnology is a engineering application of Biology and Biochemistry, including e.g. the process of

Description: In a permeation cell the process of permeation takes place under precisely defined conditions.

Description: A solid substance with such a granularity allowing to easily drain the material and

Description: According to DIN 55958, resins are fluid to solid organic compounds with a typical

Description: Technology concerned with optimising and developing fuel tanks. The main focus of interest here

Description: Layer of material, e.g. a polymer or a film, carrying very low permeability for

Description: Radio Frequency Identification (RFID) is a method for contactless reading and saving data. This

Descpription: The specific permeability of a material determines the migration rate of another substance through

Descpription: A membrane is a thin, skin-like seperating layer. In chemistry one uses membranes for

Description: The diffusion rate measures the spreading of microscopic particles within fluids or gases through

Beschreibung: Thermoplastics are engineering plastics which are solid at room temperature and which can repeatedly

Description: The permeation coefficient indicates permeability of a solid for a certain substance with respect

Description: Describes temperature dependency of (chemical) reaction speed, given the specific activation energy and the

Description: Synthetically manufactured, fluid or solid material with all the characteristics of resins defined in

Description: Combinatorial chemistry means the sysnthesis of compounds by taking into account all possible combinations

Description: The catalysis is a chemical reaction involving the presence of a catalyst. A distinction

Description: Polymer blend of actually immiscible polymers, whereby miscibility was reached during the blending process.

Description: The most useful properties of the fluoroploymeres are due to the fluorineatoms, which can

Descpription: Energy needed by a system to initiate a particular process, such as diffusion or

Description: Plastic which can be transformed into a hard, vitually unmeltable and insoluble product by

Title: Non-destructive testing – Terminology – Part 8: Terms used in leak tightness testing; Trilingual

Description: The alloy of gases that is fed as test gas into one half of

Description: An appropriate way of drying gases is to dry them dynamically. Gases with a

Description: Barrier Packaging is a packaging with very low permeability for possibly interfering materials (e.g.

Description: Permeation measuring means the process of determining the permeation rate of a certain substance.

Description: ASTM = American Society for Testing and Materials Standard development organisation, providing international standards