In situ monitoring of cyclic butylene terephtalate polymerization by dielectric sensing

Hakmé, Chady; Stevenson, Isabelle; Maazouz, Abderrahim; Cassagnau, Philippe; Boiteux, Gisèle; Seytre, Gérard

doi:10.1016/j.jnoncrysol.2007.04.051

Cited by 29 publications

(22 citation statements)

References 24 publications

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“…Hakmé et al 36 investigated the in situ monitoring of the ROP of CBT by dielectric sensing under isothermal conditions at different processing temperatures.…”

Section: Polymerization Kineticsmentioning

confidence: 99%

See 1 more Smart Citation

A Review of the Recent Advances in Cyclic Butylene Terephthalate Technology and its Composites

Abt

Sánchez‐Soto

2016

Critical Reviews in Solid State and Materials Sciences

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“…Hakmé et al 36 investigated the in situ monitoring of the ROP of CBT by dielectric sensing under isothermal conditions at different processing temperatures.…”

Section: Polymerization Kineticsmentioning

confidence: 99%

“…If the ROP is conducted below the T m of pCBT, namely below 200 °C as stated in Ref. 36 , then crystallization during polymerization is possible and processing can be performed isothermally. According to Wunderlich [38][39] , crystallization during polymerization can be either simultaneous or successive.…”

Section: Crystallizationmentioning

confidence: 99%

A Review of the Recent Advances in Cyclic Butylene Terephthalate Technology and its Composites

Abt

Sánchez‐Soto

2016

Critical Reviews in Solid State and Materials Sciences

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“…Cyclic oligomers are small molecules with a ring structure and a low molecular weight. CBT oligomers have low melt viscosity (0.017 Pa s, water like) [22,23] and are capable of rapid polymerization into linear high molecular weight poly(butylene terephthalate) in the presence of a catalyst (3-5 min at 190°C) [24,25]. The reaction is athermal as it is an entropically driven ringopening polymerization and without producing low molecular-weight by-products [26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Effect of hard segment length on the properties of poly(ether ester) elastomer prepared by one pot copolymerization of poly(ethylene glycol) and cyclic butylene terephthalate

Wang

et al. 2015

J Polym Res

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A series of poly(ether ester) thermoplastic elastomer were synthesized by a novel single step of cyclic butylene terephthalate (CBT) and poly(ethylene glycol) (PEG) in the presence of stannoxane catalyst at an elevated temperature. The resultant copolymers (pCBT-PEG) based on polymerized cyclic butylene terephthalate (pCBT) as the hard segment and PEG as the soft segment were characterized by means of fourier transform infrared spectrometer (FI-IR), proton nuclear magnetic resonance ( 1 H NMR), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) testing. The influence of hard segment length on the properties of the copolymer was investigated in the case of the soft segment length remaining constant. It is found that the pCBT segment length calculated from 1 H NMR spectra was decreased with the increase of PEG content. The glass transition, melting and crystallization temperatures and the degree of crystallinity of hard segments were increased with the increase of the pCBT segment length. Thermogravimetry (TG) and derivative TG (DTG) results revealed that the thermal degradation of copolymers was slower than that of the pCBT homopolymer. Mechanical properties of polymers were also reported and the stiffness of the copolymer was improved with the increase of hard segment length.

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“…Hakmé et al [11] studied the polymerization and crystallization kinetics of CBT through dielectric sensing. They found that the simultaneous polymerization and crystallization (type I) occurred at below 200°C; polymerization followed by crystallization (type II) at above 200°C; and only polymerization (type III) occurred at above 220°C.…”

Section: Introductionmentioning

confidence: 99%

Effects of crystalline morphologies on the mechanical properties of carbon fiber reinforcing polymerized cyclic butylene terephthalate composites

Yu¹,

Wu²,

Chang³

et al. 2012

Express Polym. Lett.

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Abstract. Carbon/polymerized cyclic butylene terephthalate (pCBT) composites were prepared through a modified film stacking technique. Three crystalline morphologies of carbon/pCBT composites were obtained at different crystallization temperatures. Tensile, flexural, short beam shear and impact tests were conducted. The low crystallinity carbon/pCBT samples were crystallized at 185°C with spherulitic structure which leads to form the large area spherulite/transcrystalline boundary regions. Consequently, the crack initiated and propagated along with 'weak' spherulite/transcrystalline boundary regions, which were resulted low mechanical properties. Carbon/pCBT sample crystallized at 210°C with high crystallinity and highly disordered spherulitic crystallites without spherulite/transcrystalline boundary lines or boundary crystals exhibits the highest mechanical properties.

show abstract

In situ monitoring of cyclic butylene terephtalate polymerization by dielectric sensing

Cited by 29 publications

References 24 publications

A Review of the Recent Advances in Cyclic Butylene Terephthalate Technology and its Composites

A Review of the Recent Advances in Cyclic Butylene Terephthalate Technology and its Composites

Effect of hard segment length on the properties of poly(ether ester) elastomer prepared by one pot copolymerization of poly(ethylene glycol) and cyclic butylene terephthalate

Effects of crystalline morphologies on the mechanical properties of carbon fiber reinforcing polymerized cyclic butylene terephthalate composites

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