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Increasing solvent polarity and addition of salts promote β-phase poly(vinylidene fluoride) formation

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Increasing solvent polarity and addition of salts promote β-phase poly(vinylidene fluoride) formation
นักวิจัย : Low, Yuen Kei Adarina , Tan, Li Yi , Tan, Lay Poh , Boey, Freddy Yin Chiang , Ng, Kee Woei
คำค้น : DRNTU::Engineering::Chemical engineering::Polymers and polymer manufacture.
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2555
อ้างอิง : Low, Y. K. A., Tan, L. Y., Tan, L. P., Boey, F. Y. C., & Ng, K. W. (2013). Increasing solvent polarity and addition of salts promote β-phase poly(vinylidene fluoride) formation. Journal of Applied Polymer Science, 128(5), 2902-2910. , 0021-8995 , http://hdl.handle.net/10220/19038 , http://dx.doi.org/10.1002/app.38451
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Journal of applied polymer science
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

This article investigates the effects of solvent polarity and salt addition on β-phase poly(vinylidene fluoride) (PVDF) formation. Films were solvent cast in aprotic solvents of varying polarities with or without salt addition. Characterization was done by Fourier transformed infra-red spectroscopy, differential scanning calorimetry, and scanning electron microscopy. Decreasing fractions of β-phase PVDF was observed with increasing drying temperature when less polar solvents were used. The most polar solvent (hexamethylphosphoramide) consistently produced films with at least 90.0% β-phase PVDF within the crystalline regions. Melting temperatures increased in correlation to absolute proportions of β-phase PVDF. Salt addition increased the formation of β-phase PVDF by 30%, with salts of higher valencies and smaller ionic radii resulting in more significant increases. Taken collectively, using solvents of higher polarities and addition of salts with high cationic valencies and small ionic radii will maximize β-phase formation in solvent cast PVDF films.

บรรณานุกรม :
Low, Yuen Kei Adarina , Tan, Li Yi , Tan, Lay Poh , Boey, Freddy Yin Chiang , Ng, Kee Woei . (2555). Increasing solvent polarity and addition of salts promote β-phase poly(vinylidene fluoride) formation.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Low, Yuen Kei Adarina , Tan, Li Yi , Tan, Lay Poh , Boey, Freddy Yin Chiang , Ng, Kee Woei . 2555. "Increasing solvent polarity and addition of salts promote β-phase poly(vinylidene fluoride) formation".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Low, Yuen Kei Adarina , Tan, Li Yi , Tan, Lay Poh , Boey, Freddy Yin Chiang , Ng, Kee Woei . "Increasing solvent polarity and addition of salts promote β-phase poly(vinylidene fluoride) formation."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2555. Print.
Low, Yuen Kei Adarina , Tan, Li Yi , Tan, Lay Poh , Boey, Freddy Yin Chiang , Ng, Kee Woei . Increasing solvent polarity and addition of salts promote β-phase poly(vinylidene fluoride) formation. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2555.