On 1st JanuaryNetComposites' media assets including netcomposites. This site is no longer being updated. Please direct all enquiries to netcomposites gardnerweb. For further details see our joint press release. This tool converts volume fractions to weight fractions and vice versa and calculates the overall density of a composite.
Read more. We have provided some indicative density data for common resins and additives for reference purposes, although price data has been omitted due to the variables in cost. A second calculator is provided to convert volume fraction of fibres to weight fraction of resin — this uses the same weight and density data entered into the ply-thickness calculator. About Contact. Sign in. Connecting you to the composites industry. Calculators Volume-Weight Fraction Calculator This tool converts volume fractions to weight fractions and vice versa and calculates the overall density of a composite.
Unit Converter Use to calculate yield, areal weight and density of composite materials. Upcoming Events. Newest Composites Questions 0 how to calculate fiber-matrix weight percentage from given density? Are there any health concerns regarding use of nanocomposites?
PET consists of polymerized units of the monomer ethylene terephthalate, with repeating C 10 H 8 O 4 units. Depending on its processing and thermal history, polyethylene terephthalate may exist both as an amorphous transparent and as a semi-crystalline polymer. The monomer bis 2-hydroxyethyl terephthalate can be synthesized by the esterification reaction between terephthalic acid and ethylene glycol with water as a byproduct this is also known as a condensation reactionor by transesterification reaction between ethylene glycol and dimethyl terephthalate DMT with methanol as a byproduct.
PET preform for injection stretch blow moulding of a bottle. PET clamshell packagingused to sell fruit, hardware, etc.
Plastic bottles made from PET are widely used for soft drinks see carbonation. For certain specialty bottles, such as those designated for beer containment, PET sandwiches an additional polyvinyl alcohol PVOH layer to further reduce its oxygen permeability.
Biaxially oriented PET film often known by one of its trade names, "Mylar" can be aluminized by evaporating a thin film of metal onto it to reduce its permeability, and to make it reflective and opaque MPET.
These properties are useful in many applications, including flexible food packaging and thermal insulation such as space blankets. Because of its high mechanical strength, PET film is often used in tape applications, such as the carrier for magnetic tape or backing for pressure-sensitive adhesive tapes. Non-oriented PET sheet can be thermoformed to make packaging trays and blister packs.
Color-conferring dyes can easily be formulated into PET sheet. When filled with glass particles or fibresit becomes significantly stiffer and more durable. PET is also used as a waterproofing barrier in undersea cables. Terylene a trademark formed by inversion of polyeth ylene ter ephthalate is also spliced into bell rope tops to help prevent wear on the ropes as they pass through the ceiling. PET is used since late as liner material in type IV composite high pressure gas cylinders.
PET in its natural state is a colorless, semi-crystalline resin. Based on how it is processed, PET can be semi-rigid to rigid, and it is very lightweight. It makes a good gas and fair moisture barrier, as well as a good barrier to alcohol requires additional "barrier" treatment and solvents.
British Plastics Federation
It is strong and impact-resistant. PET becomes white when exposed to chloroform and also certain other chemicals such as toluene.
Clear products can be produced by rapidly cooling molten polymer below T g glass transition temperature to form an amorphous solid. At room temperature the molecules are frozen in place, but, if enough heat energy is put back into them by heating above T gthey begin to move again, allowing crystals to nucleate and grow. This procedure is known as solid-state crystallization. When allowed to cool slowly, the molten polymer forms a more crystalline material.
This material has spherulites containing many small crystallites when crystallized from an amorphous solid, rather than forming one large single crystal.
Light tends to scatter as it crosses the boundaries between crystallites and the amorphous regions between them. This scattering means that crystalline PET is opaque and white in most cases. Fiber drawing is among the few industrial processes that produce a nearly single-crystal product. Intrinsic viscosity is dependent upon the length of its polymer chains but has no units due to being extrapolated to zero concentration.
The longer the polymer chains the more entanglements between chains and therefore the higher the viscosity.British Plastics Federation. Polymer Prices. Member Offers. International Market Data. Sales Leads. Chemical Legislation.
Get Funding. Promote Your Company. Health and Safety. Legal Support. BPF Branding. Communication Tools. Influence UK Policy. Your Company Page. Polyester resins combine excellent mechanical, electrical and thermal properties with very good chemical resistance and dimensional stability.
Polyesters also offer low moisture absorption and have good flow properties. Specialist Grades are designed to minimise warpage, maximise impact strength or optimise surface quality. The range also includes grades for applications that typically require higher strength and or higher heat resistance. In addition to injection moulding grades the Engineering Polyester product range includes various extrusion grades.
The product line is complemented by un-reinforced, extrudable, and toughened grades. Material tends to be supplied fully compounded. Typically properties in which they differentiate themselves from other engineering plastics are: Extreme low water absorption, in particular comparison to Nylon Polyamides Exceptional dimensional stability, due to the low water absorption.Density of polyester is kilograms per cubic meter or 1.
Examples: Solid - water - noble gas. Not really, polyester is just one material. However, there are poly blends, such as cotton-polyester or polyester-cotton.
Polyester doesn't come from an animal. It comes from the polyester trees located in the great polyester forest of South Dakota. Polyester is a material that fabric is fabricated from. Polyester can be knitted into fabrics that will stretch. Polyester also can be woven into fabrics that will not stretch. Polyester can be blended with other materials and fabricated into fabrics that will and will not stretch.
Ambiguous heat units? Actually, the melting point of polyester depends on it's constituent and density. There is a few steps you have to take to make polyester. You will have make the polyester and have it packaged and then shipped.
Polyester Georgette is fabric used to make clothing. Georgette is a shear lightweight crepe similar to chiffon. It is woven from yarns made of silk, rayon, or polyester threads. When it is made from polyester, it is known as Polyester Georgette. Asked By Curt Eichmann.
Asked By Leland Grant. Asked By Veronica Wilkinson. Asked By Daija Kreiger. Asked By Danika Abbott.Poly methyl methacrylate PMMAalso known as acrylicor acrylic glass, as well as by the trade names CryluxPlexiglas acrylicAcryliteAstariglasLucitePerclaxand Perspexamong several others see belowis a transparent thermoplastic often used in sheet form as a lightweight or shatter-resistant alternative to glass.
The same material can be used as a casting resin or in inks and coatings, among many other uses. Although not a type of familiar silica -based glass, the substance, like many thermoplastics, is often technically classified as a type of glass in that it is a non-crystalline vitreous substance hence its occasional historic designation as acrylic glass.
Chemically, it is the synthetic polymer of methyl methacrylate. PMMA is an economical alternative to polycarbonate PC when tensile strengthflexural strengthtransparencypolishability, and UV tolerance are more important than impact strengthchemical resistance, and heat resistance.
Non-modified PMMA behaves in a brittle manner when under load, especially under an impact forceand is more prone to scratching than conventional inorganic glass, but modified PMMA is sometimes able to achieve high scratch and impact resistance. The first acrylic acid was created in Methacrylic acidderived from acrylic acidwas formulated in The reaction between methacrylic acid and methanol results in the ester methyl methacrylate. In the United States, E. During World War II both Allied and Axis forces used acrylic glass for submarine periscopes and aircraft windshields, canopies, and gun turrets.
Common orthographic stylings include polymethyl methacrylate   and polymethylmethacrylate. It is a common mistake to use "an" instead of "en".
Although PMMA is often called simply "acrylic", acrylic can also refer to other polymers or copolymers containing polyacrylonitrile. PMMA is routinely produced by emulsion polymerizationsolution polymerizationand bulk polymerization.
Generally, radical initiation is used including living polymerization methodsbut anionic polymerization of PMMA can also be performed. PMMA is thus an organic glass at room temperature; i. The forming temperature starts at the glass transition temperature and goes up from there. The highest quality PMMA sheets are produced by cell castingbut in this case, the polymerization and molding steps occur concurrently. The strength of the material is higher than molding grades owing to its extremely high molecular mass.
Rubber toughening has been used to increase the toughness of PMMA to overcome its brittle behavior in response to applied loads.Polymers Standards Ion Exchange Resins. Call Us: Density of Polymers by density.
Poly 4-methylpentene. Poly 1-pentene. Poly 1-butene. Poly 1-hexene. Poly 1-octadecene. Polypropylene, atactic. Poly vinyl n-decyl ether. Poly 1,4-pentadiene. Poly methyl n-tetradecyl siloxane. Poly methyl n-octadecylsiloxane. Poly vinyl n-dodecyl ether. Poly 1,4-butadiene. Polypropylene, isotactic. Polybutadiene, cis. Poly vinyl 2-ethylhexyl ether.
Polybutadiene, dicarboxy terminated. Poly 1,2-butadiene. Polybutadiene oligomer, acrylated. Poly methyl n-octylsiloxane. Poly methyl n-hexylsiloxane. Poly vinyl n-octyl ether. Poly 1-buteneisotactic.
Poly isobutylene-co-isoprene Polyethylene, low density. Poly vinyl sec-butyl ether. Poly vinyl isopropyl ether. Poly vinyl n-hexyl ether. Poly vinyl n-butyl ether. Poly lauryl methacrylate. Poly dodecyl methacrylate. Polyethylene, oxidized. Polybutadiene, phenyl terminated. Poly vinyl isobutyl ether.Resin Casting - Polyurethane vs Polyester Resin
Polydimethylsiloxane, ethoxy terminated. Polyethylene, high density. Poly p-t-butyl styrene.A status code that reflects the status of the association creation. See n-gram for more information. Example: true category optional The category that best describes the topic model. Specifies the fields that won't be included in the topic model. Example: "MySample" tags optional A list of strings that help classify and index your topic model.
This will be 201 upon successful creation of the topic model and 200 afterwards. Make sure that you check the code that comes with the status attribute to make sure that the topic model creation has been completed without errors. This is the date and time in which the topic model was created with microsecond precision.
True when the topic model has been built in development mode. The list of fields's ids that were excluded to build the topic model. The list of input fields' ids used to build the topic model. In a future version, you will be able to share topic models with other co-workers or, if desired, make them publicly available. Whether to include a contiguous sequence of two items from a given sequence of text. Only the names of the topics can be updated. If ommitted, both damped and non-damped trends will be tried and the best models returned.
If it is omitted, then the missing values are filled via spline interpolation before fitting. Example: "median" description optional A description of the time series up to 8192 characters long.
Example: "This is a description of my new time series" error optional Any of the following values to specify types of ETS models: 1 (additive), 2 (multiplicative). Multiplicative error models are only available when the objective field has strictly positive values (greater than 0). Example: 100 name optional The name you want to give to the new time series.
Example: 2 tags optional A list of strings that help classify and index your time series. This will be 201 upon successful creation of the time series and 200 afterwards. Make sure that you check the code that comes with the status attribute to make sure that the time series creation has been completed without errors. This is the date and time in which the time series was created with microsecond precision. True when the time series has been built in development mode.
See the Forecast Result Object definition below. In a future version, you will be able to share time series with other co-workers or, if desired, make them publicly available.