On crystallization of bisphenol-A polycarbonate thin films upon annealing

Yang, Chunhong; Li, Qichao; Mao, Wenfeng; Wang, Peng; He, Chunqing

doi:10.1016/j.physleta.2015.07.024

Cited by 6 publications

(3 citation statements)

References 30 publications

(30 reference statements)

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“…where X c is the crystallinity of PC, ΔH m is the melting enthalpy of PC in J g −1 , ΔH m,0 is the melting enthalpy when the crystallinity of PC is 100%, ΔH m,0 = 109.7 J g −1 [7]; w is the mass fraction of PC in the modified system. 3.…”

Section: Cn Increases the Chain Mobility And Thus Crystallinity Of Pcmentioning

confidence: 99%

“…PC nucleating agents mainly include inorganic fillers, polymers, and organic salts. For example, carbon nanotubes [6][7][8] can promote the regular arrangement of PC molecular chains and form a more perfect crystal structure under a long time heat treatment. Carbon fibers (CF) [9,10] can make PC to crystallize orientatively on the CF surface.…”

Section: Introductionmentioning

confidence: 99%

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Effective enhancement of poly(bisphenol-A carbonate) crystallinity with polyamide-66 ionized nucleation through ion-dipole interactions coupled with plasticization

Zhang

Song

et al. 2023

Mater. Res. Express

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To improve the crystallinity of poly(bisphenol-A carbonate) (PC). Polyamide-66 (PA-66) is ionized by CaCl2 to prepare the various degrees of ionization (DIs) of PA-66 ionenes (CaCl2–PA-66) as nucleating agents to co-modify PC with cholesterol nonanoate (CN) as plasticizers. Compared with non-ionized PA-66, CaCl2–PA-66 enhance the crystallinity of PC. Concretely, with the DI of CaCl2–PA-66 is raised from 0 to 37.2 mol%, the crystallinity of PC/CN/CaCl2–PA-66 (90/5/5 w/w/w) is first increased from 19.2% to 31.5% and then decreased to 16.9%. This is attributed to the stronger ion-dipole interactions between the ionized nucleating agents and PC, which enhance the compatibility and further dispersibility to create finer crystal with a denser distribution, and the nucleation efficiency is elevated thus facilitating the PC crystallization. However, when the DI of CaCl2–PA-66 is overly high (≥11.4 mol%), it leads to excessive ionic crosslinking, which reduces dispersibility and nucleation efficiency. Therefore, the modification of PC with a suitable DI of CaCl2–PA-66 can advance its crystallinity, which is a novel and effective approach.

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Section: Cn Increases the Chain Mobility And Thus Crystallinity Of Pcmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effective enhancement of poly(bisphenol-A carbonate) crystallinity with polyamide-66 ionized nucleation through ion-dipole interactions coupled with plasticization

Zhang

Song

et al. 2023

Mater. Res. Express

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“…Positron annihilation lifetime spectroscopy (PALS) has drawn much attention recently in condensed materials research due to its high sensitivity to vacancies [13,14], surface and interface defects, free-volume holes [15][16][17] and pores [18][19][20]. When an energetic positron is implanted in solid materials, it slows down to thermalized state through collisions with surrounding molecular electrons and molecules.…”

Section: Introductionmentioning

confidence: 99%

Positron Annihilation Studies of the Free Volumes in Nylon12/PVA Films Treated by Supercritical Carbon Dioxide

Yin

Zhou

et al. 2017

Acta Phys. Pol. A

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Free volume variations of Nylon12/Polyvinyl alcohol (Nylon12/PVA) blends treated in supercritical carbon dioxide (ScCO2) were investigated using positron annihilation lifetime spectroscopy. It is found that o-Ps lifetime τ3 and the corresponding intensity I3 in Nylon12/PVA decrease with increase of the PVA content. Being treated in ScCO2 at 50• C and 20 MPa for 1 h, the free volume holes in Nylon12/PVA blends expand to different extents depending on the weight ratio of PVA. After releasing of CO2, the free volume size decreases as a function of the elapsed time due to the molecular relaxation, and the relaxation time constant depends on the content of PVA in the blends.

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Effective improvement in poly( bisphenol‐A carbonate) crystallinity by ionization of its polyamide‐66 heterogeneous nucleator: The role of ion‐dipole interactions

Ding

Luo

Wang

et al. 2020

Polymer Crystallization

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On crystallization of bisphenol-A polycarbonate thin films upon annealing

Cited by 6 publications

References 30 publications

Effective enhancement of poly(bisphenol-A carbonate) crystallinity with polyamide-66 ionized nucleation through ion-dipole interactions coupled with plasticization

Effective enhancement of poly(bisphenol-A carbonate) crystallinity with polyamide-66 ionized nucleation through ion-dipole interactions coupled with plasticization

Positron Annihilation Studies of the Free Volumes in Nylon12/PVA Films Treated by Supercritical Carbon Dioxide

Effective improvement in poly( bisphenol‐A carbonate) crystallinity by ionization of its polyamide‐66 heterogeneous nucleator: The role of ion‐dipole interactions

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