Question

hi friends ucan say expand the cpet and ptet​

Answer 1

Answer:

CPET:

Ashby charts

See where Crystalline Polyethylene terephthalate (CPET) falls on the material property chart for Density against Elastic modulus in your materials selection and design process. Our Ashby charts are interactive with more technical data upon clicking. Sign up to get access to this premium feature for free.

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All categories

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100

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0.1

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10

100

1000

Density, ρ (g/cm³)

Elastic modulus, E (GPa)

E/ρ

E1/2/ρ

E1/3/ρ

Crystalline Polyethylene ...

Polymer

Metal

Composite

Ceramic

Glass

Biological Material

Min. mass design - Rod

Min. mass design - Beam

Min. mass design - Shell

Properties

General

Densityρ

1.38 - 1.4 g/cm³ at 20 °C

Mechanical

Elastic modulusE

2.8 - 3.1 GPa at 20 °C

ElongationA

50 - 300 % at 20 °C

Impact strength, Charpy notchedIvnot

1 - 11 kJ/m² at 20 °C

Impact strength, Charpy unnotched Iunnot

no break

Tensile strengthRm

60 - 80 MPa at 20 °C

at 5-7% strain

Thermal

Coefficient of thermal expansionα

7E-5 - 8E-5 1/K at 20 °C

Flammability

UL 94 HB

Max service temperature, longTmaxlong

100 - 120 °C

Max service temperature, short

200 °C

Melting pointTm

250 - 260 °C

Specific heat capacitycp

1050 J/(kg·K) at 20 °C

Thermal conductivityλ

0.2 - 0.24 W/(m·K) at 20 °C

Electrical

Dielectric constantεr

3.2 - 3.6 [-] at 20 °C

Electrical resistivityρel

1.00E+13 Ω·m at 20 °C

Optical

Transparency

no

Explanation: