A Practical Synthesis of the Cyclic Butylene Terephthalate Trimer

Heterocycles ◽  
2018 ◽  
Vol 96 (3) ◽  
pp. 483 ◽  
Author(s):  
Yu Luo ◽  
Xiaolin Li ◽  
Pu Zhou ◽  
Wenxuan Wu ◽  
Li Zhan ◽  
...  
Keyword(s):  
Butylene Terephthalate ◽  
Cyclic Butylene Terephthalate ◽  
Practical Synthesis

scholarly journals Correlation between polymerization of cyclic butylene terephthalate (CBT) and crystallization of polymerized CBT

2015 ◽  
Vol 33 (8) ◽  
pp. 1104-1113 ◽  
Author(s):  
Jian-qiang Zhang ◽  
Zhi-fang Li ◽  
Zheng Zhang ◽  
Hui-xia Feng ◽  
Zong-bao Wang ◽  
...  
Keyword(s):  
Butylene Terephthalate ◽  
Cyclic Butylene Terephthalate

scholarly journals An Innovative Approach for Restoring the Mechanical Properties of Thermoplastic-Matrix Nanocomposite by the Use of Partially Polymerized Cyclic Butylene Terephthalate

2020 ◽  
Vol 4 (4) ◽  
pp. 146
Author(s):  
Francesca Ferrari ◽  
Antonio Greco
Keyword(s):  
Mechanical Properties ◽  
Healing Process ◽  
Self Healing ◽  
Butylene Terephthalate ◽  
Thermoplastic Matrix ◽  
Damaged Zone ◽  
Cyclic Butylene Terephthalate ◽  
Flexural Tests ◽  
Activation Times ◽  
Matrix Nanocomposite

This work is focused on the production of a smart material from cyclic butylene-terephthalate (CBT), characterized by the built-in capability to recover its damage, through the catalyzed ring opening polymerization (ROP) of its oligomers; in particular, molten CBT, after filling the damaged zone, can be converted into poly-butylene terephthalate (PBT), thus promoting a join of the broken surfaces and fixing the crack. To obtain a material with self-healing potential, the production of a partially polymerized system is required. For this purpose, two solutions were studied: the first one involved the use of two catalysts with different activation times, whereas the second solution implied the intercalation of the faster catalyst inside the nanoclay lamellae. Since the intercalation allowed slowing the activation of the catalyst, residual CBT can be converted in a second step. Mechanical properties of partially reacted PBT samples and their healing ability were checked by flexural analyses; in order to promote the healing process, samples were notched to simulate partial damage and left in oven for different times and temperatures, to allow the activation of the unreacted catalyst with the consequent ROP of the residual CBT; flexural tests on samples after healing showed a good recovery of mechanical properties.

Electrical and Mechanical Properties of Short-Carbon-Fiber Reinforced Polymerized Cyclic Butylene Terephthalate Composites

2015 ◽  
Vol 813 ◽  
pp. 278-284
Author(s):  
Bin Yang ◽  
Ji Feng Zhang ◽  
Lu Zhang ◽  
Shao Hua Fan ◽  
Li Min Zhou
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Percolation Threshold ◽  
Bending Test ◽  
Material System ◽  
Melt Mixing ◽  
Butylene Terephthalate ◽  
Short Carbon Fiber ◽  
Cyclic Butylene Terephthalate ◽  
Short Carbon

Polymerized cyclic butylene terephthalate (pCBT) resin casts filled with short carbon fibers were prepared by the melt-mixing approach. The electrical conductivity of short-carbon-fiber (SCF) reinforced thermoplastic pCBT resin casts were investigated with a special attention paid to the properties in the percolation threshold region and the mechanical properties of the composites were also studied. The percolation threshold value of the novel material system was determined which was also verified by SEM images and the thermoelectric behavior of the specimens. Even though the electrical properties of SCF/pCBT composites enhanced significantly, the material becomes more brittle than neat pCBT and all the specimens appear brittle fracture during the mechanical test. Moreover, fiber pull-out is the main damage form in three-point-bending test.

Novel conductive polymer composites based on poly(butylene terephtalate) filled with carbon fibers

e-Polymers ◽  
2008 ◽  
Vol 8 (1) ◽  
Author(s):  
Liubov Bardash ◽  
Gisèle Boiteux ◽  
Gérard Seytre ◽  
Chady Hakme ◽  
Nicolas Dargère ◽  
...  
Keyword(s):  
Carbon Fibre ◽  
Percolation Threshold ◽  
Polymer Composites ◽  
Carbon Fibers ◽  
Conductive Polymer ◽  
Processing Conditions ◽  
Butylene Terephthalate ◽  
Conductive Polymer Composites ◽  
Cyclic Butylene Terephthalate ◽  
Conducting Polymer Composites

AbstractPoly(butylene terephthalate) (cPBT) synthesized from cyclic Butylene Terephthalate oligomers (CBT) was used as a matrix for carbon fibre (CF) conducting polymer composites (CPC). DSC, rheological studies and measurements of torque of CBT/CF were performed in order to optimise the processing conditions of CPC. DC and AC measurements were carried out for these composites and have shown a low percolation threshold for cPBT/CF.

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