Zhejiang Guanyu Stainless Steel Tube Co., Ltd  
  Directory | Useful Tool | Sitemap | Contact US | Home

         

Plastics

Plastics




Plastics can be classified by chemical structure, namely the molecular units that make up the polymer's backbone andside chain. Some important groups in these classifications are the acrylics, polyesters, silicones, polyurethanes, and halogenated plastics. Plastics can also be classified by the chemical process used in their synthesis, such ascondensation, polyaddition, and cross-linking.

Other classifications are based on qualities that are relevant for manufacturing or product design. Examples of such classes are the thermoplastic and thermoset, elastomer, structural, biodegradable, and electrically conductive. Plastics can also be classified by various physical properties, such as density, tensile strength, glass transition temperature, and resistance to various chemical products.

Due to their relatively low cost, ease of manufacture, versatility, and imperviousness to water, plastics are used in an enormous and expanding range of products, from paper clips to spaceships. They have already displaced many traditional materials, such as wood, stone, horn and bone, leather, paper, metal, glass, and ceramic, in most of their former uses.

The use of plastics is constrained chiefly by their organic chemistry, which seriously limits their properties, such as hardness, density, and resistance to heat, organic solvents, oxidation, and ionizing radiation. In particular, most plastics will melt or decompose when heated to a few hundred degrees celsius. While plastics can be made electrically conductive, with the conductivity of up to 80 kS/cm in stretch-oriented polyacetylene,  they are still no match for most metals like copper which have conductivities of several hundreds kS/cm. Plastics are still too expensive to replace wood, concrete and ceramic in bulky item like ordinary building, bridgs, dam, pavement, and railroad ties.

Chemical Structure

Common thermoplastics range from 20,000 to 500,000 amu, while thermosets are assumed to have infinite molecular weight. These chains are made up of many repeating molecular units, known as repeat units, derived from monomers; each polymer chain will have several thousand repeating units. The vast majority of plastics are composed of polymers of carbon and hydrogen alone or with oxygen, nitrogen, chlorine or sulfur in the backbone. Some of commercial interests are silicon based. The backbone is that part of the chain on the main "path" linking a large number of repeat units together. To customize the properties of a plastic, different molecular groups "hang" from the backbone (usually they are "hung" as part of the monomers before linking monomers together to form the polymer chain). This fine tuning of the properties of the polymer by repeating unit's molecular structure has allowed plastics to become an indispensable part of twenty first-century world.

Some plastics are partially crystalline and partially amorphous in molecular structure, giving them both a melting point (the temperature at which the attractive intermolecular forces are overcome) and one or more glass transitions (temperatures above which the extent of localized molecular flexibility is substantially increased). The so-called semi-crystalline plastics include polyethylene, polypropylene, poly (vinyl chloride), polyamides (nylons), polyesters and some polyurethanes. Many plastics are completely amorphous, such as polystyrene and its copolymers, poly (methyl methacrylate), and all thermosets.

Plastics Types
Amorphous Semi-crystalline
Ultra polymers SRP, TPI, PAI, High-temperature sulfone|HTS PFSA, PEEK
High performance polymers PPSU, PEI, PESU, PSU Fluoropolymers: LCP, Polyarylamide|PARA, HPN, PPS,PPA
Other polyamides
Mid range polymers PC, PPC, COC, PMMA, ABS, PVC Alloys PEX, PVDC, PBT, PET, POM, PA 6,6, UHMWPE
Commodity polymers PS, PVC PP, HDPE, LDPE

  • ABS Plastic
  • Acetal Plastic
  • Acrylic Plastic
  • CA Plastic
  • CAB Plastic
  • Cellulosic Plastic
  • EPS Plastic
  • EVA Plastic
  • Fluoropolymers
  • GPPS Plastic
  • HDPE Plastic
  • HIPS Plastic
  • LCP Plastic
  • LDPE Plastic
  • LLDPE Plastic
  • Misc. Plastic
  • Nylon Plastic
  • OPP Plastic
  • OPS Plastic
  • PB Plastic
  • PBT Plastic
  • PC Plastic
  • PC-ABS Plastic
  • PE Plastic
  • PEEK Plastic
  • PEI Plastic
  • PET Plastic
  • PETG Plastic
  • Polyester Plastic
  • Polyketone Plastic
  • Polysulfone Plastic
  • PP Plastic
  • PVDF Plastic
  • PPE Plastic
  • PPS Plastic
  • PS Plastic
  • PTFE Plastic
  • PVC Plastic
  • SAN Plastic
  • TPE Plastic
  • TPO Plastic
  • TPU Plastic

Plastics Selection and Comparison
General Propertie and Characteristics of Plastics
Plastics Thermal Expansion Coefficients
Common Plastics and Uses Application
Special Purpose Plastics and Uses Application
Material Properties of Some Thermoplastics
ABS Pipes - Pressure Ratings
Thermoplastics - Physical Properties

TubingChina.com All Rights Reserved

Directory | Standard | Heat | Heat Exchanger | Temperature | Pressure | Corrosion | Hardness | Surface | Properties | Select Stainless Steel | Contact US

Useful Tools:

Stainless Steel Weight Calculator
Metals Weight Calculator
Nickel Alloy Weight Calculator
Copper Brass Alloy Weight Calculator
Copper Brass Alloy Sheet Plate Weight Calculator
Sheet Plate Weight Calculator
Hardness Conversion Calculator
Hardness Conversion Chart
Rockwell Brinell Vickers Shore Hardness Conversion Chart
Conversion Calculator
Length Weight Temperature Volume Pressure Calculater
Pipe Working Pressure Calculator
Pressure Conversion Converter
Round Bar Size Calculator
Gauge Sizes
Sheet Metal Gauge
Pipe Schedule
Nominal Pipe Size
ANSI Pipe Chart
Inch to mm Chart
Stainless Steel Pipe Sizes
Stainless Steel Tubing Sizes Chart
Stainless Steel L H Grade
Stainless Steel Density
Conversion of Stainless Steel
Nickel Alloy Grades Comparison Material Grade Chart Carbon Steel
Structural Steel Comparison Chart



Main Products:

BA Tube | AP Tube
Condenser Tubes Tubing
Stainless Steel Reheater Tube Superheater Tubes
Stainless Steel U bend Tube
Nickel Alloy U bend Tubes
Copper Alloy U Bend Tubes
Heat Exchanger Tube
Super Duplex Pipe
Nickel Alloy Tube
Brass Alloy Tubing
Copper Nickel Alloys Tubes
Stainless Steel Hollow Tube
Stainless Steel Oval Tubing
Stainless Steel Square Tubing
Stainless Steel Rectangular Tubing
Stainless Steel Capillary Tube
Duplex Stainless Steel Pipe
Seamless Stainless Steel Tubing
Corrugated Stainless Steel Tubing
Stainless Steel Twisted Tube
Polishing Stainless Steel Tubing
Stainless Steel Aircraft Tube
Stainless Steel Hydraulic Tubing
Stainless Steel Instrumentation Tubing
Stainless Steel Angle Iron Bar
Stainless Steel Mechanical Tube
Bright Annealing Stainless Tube
Heat resistant Stainless Steel
Stainless Steel Welded Pipe
Extruded Serrated Finned Tubes Integral Finned Tubes / Extruded Aluminum Finned Tubes
Brass Alloys Copper Nickel Alloy Integral Low Finned Tubes
HFW High Frequency Welded Helical Spiral Serrated Finned Tubes
Corrosion Resistant Stainless Steel
Corrosion Resistance Stainless Steel

Stainless Steel Tubing Pipe

304 Stainless Steel Pipe
304L Stainless Steel Pipe
304H Stainless Steel Pipe
304/304L Stainless Steel Tubing
309S Stainless Steel Pipe
310S Stainless Steel Pipe
316L Stainless Steel Tubing
316Ti Stainless Steel Tube
317L Stainless Steel Pipe
321 321H Stainless Steel
347 347H Stainless Steel
904L N08094 Seamless Tubes
17-4 PH 630 UNS S17400 Stainless Steel
253MA S30815 Stainless Steel Tube
S31254 254 SMO Pipe
S31803 Stainless Steel
2205 Duplex Pipe Tubing
S32101 Stainless Steel
S32304 Stainless Steel
2507 Super Duplex Pipe
S32750 Super Duplex Pipe
S32760 Super Duplex Steel
1.4462 Stainless Steel Pipe
ASTM A213 | ASTM A269
ASTM A312 | ASTM A511
ASTM A789 | ASTM A790
ASTM B161 / ASME SB 161 | ASTM B111
EN 10216-5
ASTM A789 ASME SA 789 S31803 S32205 S32101 S32750 S32760 S32304 S31500 S31260 Seamless Tubes
EN 10216-5 1.4462 1.4362 1.4162 1.4410 1.4501 Seamless Tubes
Nickel Alloy Tubing:

UNS N08020 Alloy 20 Tubing
UNS N02200 Alloy 200 Tube
UNS N02201 Alloy 201 Pipe
UNS N04400 Monel 400 Tubing
N06600 Inconel 600 Tube
N06601 Inconel 601 Tubing
N06625 Inconel 625 Tubes
N08800 Incoloy 800 Tube
N08810 Incoloy 800H Tube
N08811 Incoloy 800HT Tubing
UNS N08825 Incoloy 825 Pipe
ASTM B622 N10276 C276 Tubing
ASTM B622 N06022 Hastelloy C-22 Alloy Tubes
C28000 Brass Seamless Tubes C44300 Brass Seamless Tubes
C68700 Brass Seamless Tubes
C70600 Copper Nickel Tubes
C71500 Copper Nickel Tubes
DIN 2391 Seamless Precision Steel Tubes
EN 10305-1 E215 E235 E355 Seamless Precision Steel Tube Tubing Tubes
DIN 2393 St28 St34.2 St37.2 St44.2 St52.3 Welded Precision Steel Tubes
EN 10305-2 E195 E235 E355 Welded Cold Drawn Precision Steel Tube