scholarly journals A study on the crystallization behavior and mechanical properties of poly(ethylene terephthalate) induced by chemical degradation nucleation

RSC Advances ◽  
2017 ◽  
Vol 7 (59) ◽  
pp. 37139-37147 ◽  
Author(s):  
Diran Wang ◽  
Faliang Luo ◽  
Zhiyuan Shen ◽  
Xuejian Wu ◽  
Yaping Qi
Keyword(s):  
Mechanical Properties ◽  
Crystallization Behavior ◽  
Ethylene Terephthalate ◽  
Crystallization Rate ◽  
Chemical Degradation ◽  
Carboxylate Anion ◽  
Nucleate Agent ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene ◽  
Pet Crystallization

In order to overcome low crystallization rate of PET, HPN-68L was selected to replace the special nucleate agent of PET to improve PET crystallization for its carboxylate anion structure which usually showed high induced nucleation ability for PET.

Crystallization behavior and mechanical properties of an electrospun ethanol-mediated poly(ethylene terephthalate) fibrous membrane

2015 ◽  
Vol 132 (32) ◽  
pp. n/a-n/a
Author(s):  
Li-Na Wang ◽  
Yan-Wei Wang ◽  
Wen-Tao Liu ◽  
Xue-Lian Xia ◽  
Su-Qin He ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Crystallization Behavior ◽  
Ethylene Terephthalate ◽  
Fibrous Membrane ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

scholarly journals UIO-66 as Nucleating Agent on the Crystallization Behavior and Properties of Poly(Ethylene Terephthalate)

Polymers ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 2266
Author(s):  
Yue Yin ◽  
Yuan Wang ◽  
Linghui Meng
Keyword(s):  
Tensile Strength ◽  
Specific Surface ◽  
Crystallization Temperature ◽  
Crystallization Behavior ◽  
Ethylene Terephthalate ◽  
Crystallization Rate ◽  
Nucleating Agent ◽  
High Specific Surface Area ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

In this study, not only was the similar terephthalate structure between UIO-66 and PET utilized to improve compatibility, but the Zr4+ exposed by defects of UIO-66 was also utilized to improve the interaction between PET and UIO-66. Furthermore, PET nanocomposites with different contents of UIO-66 were also fabricated. Due to the high specific surface area and coordination of Zr4+, UIO-66 has high nucleation efficiency in the PET matrix. Compared with pure PET, the crystallization rate of PET/UIO-66 nanocomposite is significantly increased, and the crystallization temperature of PET-UIO66-1 is significantly increased from 194.3 °C to 211.6 °C. In addition, the tensile strength of nanocomposites has also been improved due to coordination.

Structural, thermal and rheological studies on newly developed polyesters randomly copolymerized with poly (tetramethylene glycol) (PTMG)

2008 ◽  
Vol 1151 ◽  
Author(s):  
Matsumoto Osamu ◽  
Hotta Atsushi
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Ethylene Terephthalate ◽  
Elastic Recovery ◽  
Crystallization Rate ◽  
Service Temperature ◽  
Recovery Test ◽  
Tensile Tester ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

ABSTRACTPoly (cyclohexanedimethanol cyclohexanedicarboxlic acid) (PCC), a fairly newly synthesized polyester, has been studied. Having a good experience of increasing both thermal stability and service temperature when applied to typical polymers, poly (tetramethylene glycol) (PTMG) was selected as a softening agent that was randomly copolymerized into the PCC chains. Another widely-used polyester, poly (ethylene terephthalate) (PET) was also produced in order to investigate the effect of PTMG, which was compared with the properties of the newly developed random PCC-PTMG copolymers (PCCP). In this study, the crystalline structures, the thermal and the mechanical properties of both PCC and PET containing different ratios of the random segment of PTMG were investigated by differential scanning calorimetery (DSC) and tensile tester.It was found that the crystallization rate of pure PCC was significantly slow, whereas for PCCP, PTMG effectively accelerated the crystallization rate with increasing PTMG, and the sample with 25 wt% of PTMG had the fastest crystallization rate in all PCCP samples. Here, the PTMG acted as an accelerator, simultaneously depressing the movement of PCC molecular chains. The elastic recovery test indicated that the ability of PTMG as a softening agent was highly demonstrated at 20 wt% of PTMG. The results of PCCP were compared with those of PET-PTMG copolymers (PETP) and it was found that there were optimum values of PTMG for the crystallization rate on both samples. Additionally, the results of the elastic recovery test indicated that the softening effects observed in PCCP were more pronounced than those observed in PETP.

Rheological behavior, mechanical properties, and nonisothermal crystallization behavior of poly(ethylene terephthalate)/modified carbon fiber composites

2018 ◽  
Vol 31 (6) ◽  
pp. 733-740 ◽  
Author(s):  
GuoLiang Lin ◽  
DongWei Li ◽  
MinYi Liu ◽  
XiaoYi Zhang ◽  
YuYing Zheng
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Rheological Behavior ◽  
Crystallization Behavior ◽  
Ethylene Terephthalate ◽  
Solid Phase ◽  
Carbon Fiber Composites ◽  
Nonisothermal Crystallization ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

Maleic anhydride-grafted carbon fiber (CF- g-MAH) was prepared by a solid-phase grafting method. The rheological behavior, morphology, mechanical properties, and nonisothermal crystallization behavior of pure poly(ethylene terephthalate) (PET) and PET/CF and PET/CF- g-MAH composites were investigated. The rheological analyses and mechanical tests show that the addition of CF or CF- g-MAH increased the complex viscosity and mechanical properties of PET. The morphology observations confirm that the introduction of the MAH group on the surfaces of the CF enhanced the interactions between the CF and PET, resulting in the fine dispersion of CF- g-MAH in the PET matrix. In addition, the analyses of the nonisothermal crystallization behavior of pure PET and the PET/CF and PET/CF- g-MAH composites show that CF or CF- g-MAH can act as a heterogeneous nucleating agent in PET and accelerate its crystallization. Compared to CF, CF- g-MAH is a more effective nucleator for PET.

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