Improve the compatibility and crystallization ability of polyhedral oligomeric silsesquioxanes and poly (ethylene terephthalate) by using transesterification method

2021 ◽  
pp. 51779
Author(s):  
Yue Yin ◽  
Linghui Meng
Keyword(s):  
Ethylene Terephthalate ◽  
Polyhedral Oligomeric Silsesquioxanes ◽  
Crystallization Ability ◽  
Poly Ethylene Terephthalate ◽  
Transesterification Method ◽  
Poly Ethylene

scholarly journals Synthesis of High Performance Thiophene–Aromatic Polyesters from Bio-Sourced Organic Acids and Polysaccharide-Derived Diol: Characterization and Degradability Studies

Molecules ◽  
2022 ◽  
Vol 27 (1) ◽  
pp. 325
Author(s):  
Lesly Dasilva Wandji Djouonkep ◽  
Arnaud Kamdem Tamo ◽  
Ingo Doench ◽  
Naomie Beolle Songwe Selabi ◽  
Emmanuel Monga Ilunga ◽  
...  
Keyword(s):  
Tensile Strength ◽  
High Performance ◽  
Ethylene Terephthalate ◽  
Mechanical Performance ◽  
Structure Property ◽  
Weight Losses ◽  
Crystallization Ability ◽  
Poly Ethylene Terephthalate ◽  
Structure Property Relationship ◽  
Poly Ethylene

In this work, the feasibility of replacing petroleum-based poly(ethylene terephthalate) (PET) with fully bio-based copolyesters derived from dimethyl 2,5-thiophenedicarboxylate (DMTD), dimethyl 2,5-dimethoxyterephthalate (DMDMT), and polysaccharide-derived 1,6-hexanediol (HDO) was investigated. A systematic study of structure-property relationship revealed that the properties of these poly(thiophene–aromatic) copolyesters (PHS(20–90)) can be tailored by varying the ratio of diester monomers in the reaction, whereby an increase in DMTD content noticeably shortened the reaction time in the transesterification step due to its higher reactivity as compared with DMDMT. The copolyesters had weight-average molar masses (Mw) between 27,500 and 38,800 g/mol, and dispersity Đ of 2.0–2.5. The different polarity and stability of heterocyclic DMTD provided an efficient mean to tailor the crystallization ability of the copolyesters, which in turn affected the thermal and mechanical performance. The glass transition temperature (Tg) could be tuned from 70–100 °C, while the tensile strength was in a range of 23–80 MPa. The obtained results confirmed that the co-monomers were successfully inserted into the copolyester chains. As compared with commercial poly(ethylene terephthalate), the copolyesters displayed not only enhanced susceptibility to hydrolysis, but also appreciable biodegradability by lipases, with weight losses of up to 16% by weight after 28 weeks of incubation.

Nanostructured ZnO and CuI Thin Films on Poly(Ethylene Terephthalate) Tapes for UV-Shielding Applications

2020 ◽  
Vol 12 (3) ◽  
pp. 03007-1-03007-8
Author(s):  
N. P. Klochko ◽  
◽  
K. S. Klepikova ◽  
D. O. Zhadan ◽  
V. R. Kopach ◽  
...  
Keyword(s):  
Thin Films ◽  
Ethylene Terephthalate ◽  
Uv Shielding ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene
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