Physical and dielectric properties of irradiated polypropylene and poly(ethylene terephthalate)

1986 ◽  
Vol 28 (4) ◽  
pp. 393-397 ◽  
Author(s):  
H. Kita ◽  
K. Okamoto ◽  
I. Sakamoto
Keyword(s):  
Dielectric Properties ◽  
Ethylene Terephthalate ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

Dielectric Analysis Of Semi-Crystalline Poly(Ethylene Terephthalate)

1994 ◽  
Vol 347 ◽  
Author(s):  
Jianghua Wei ◽  
Richard Delgado ◽  
Martin C. Hawley ◽  
Mark T.Demeuse
Keyword(s):  
Dielectric Properties ◽  
Ethylene Terephthalate ◽  
Dielectric Analysis ◽  
Frequency Range ◽  
Fixed Frequency ◽  
Scanning Calorimetry ◽  
Fixed Temperature ◽  
Temperature Range ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

ABSTRACTDielectric properties of poly(ethylene terephthalate) (PET) were measured over a frequency range of 10 KHz to 2.45 GHz and a temperature range of 20 to 110°C. Relaxation peaks were identified at 1) fixed frequency with variable temperatures, and 2) fixed temperature with variable frequencies. The crystallinity of poly (ethylene terephthalate) was measured using differential scanning calorimetry (DSC). Relationships between crystallinity, dielectric properties, and location of the dielectric relaxation peak on the frequency and temperature scales were studied for poly(ethylene terephthalate). Also, the dielectric loss factor decreases with increased crystallinity at 2.45 GHz and 4 GHz within the temperature range studied.

scholarly journals Effects of Catalysts on Dielectric Properties and D. C. Conduction in Poly(ethylene terephthalate)

1971 ◽  
Vol 2 (4) ◽  
pp. 518-529 ◽  
Author(s):  
Hiroyuki Sasabe ◽  
Kiwa Sawamura ◽  
Shogo Saito ◽  
Kentaro Yoda
Keyword(s):  
Dielectric Properties ◽  
Ethylene Terephthalate ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

Research of Poly (Ethylene Terephthalate) Modified by Calcium Lignosulfonate

2011 ◽  
Vol 415-417 ◽  
pp. 1725-1728
Author(s):  
Han Bing Ma ◽  
Yang Li ◽  
Xiu Yun Li
Keyword(s):  
Dielectric Properties ◽  
Ethylene Terephthalate ◽  
Dielectric Measurement ◽  
Mechanical Measurement ◽  
The Third ◽  
Poly Ethylene Terephthalate ◽  
Measurement Results ◽  
Poly Ethylene ◽  
Effective Additive ◽  
Positive Effect

In this paper, mechanical and dielectric properties of Poly (ethylene terephthalate) (PET) modified by calcium lignosulfonate were measured. The mechanical measurement results show that the introduction of the third monomer LS could significantly reinforce and toughen PET. When LS content was increasing from 0 to 0.5%, the tensile strength of PET was increasing from 54MPa to 62MPa，resulting in an increasing rate of 15%; flexural strength was increased from 85MPa to 92MPa, resulting in an increasing rate of 8%; impact strength was increasing from 2.5KJ.m-2 to 4.2 KJ.m-2, resulting in an increasing rate of 68%; but excessive content of lignin would harm mechanical properties of PET. Dielectric measurement results indicated that LS had positive effect on decreasing dielectric loss of PET while content of LS was about 0.5%. LS is an effective additive to improve mechanical and dielectric properties of PET.

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