Morphology of high-pressure crystallized poly(ethylene 2,6-naphthalate)

Li, Liangbin; Wang, Chunmei; Huang, Rui; Zhang, Ling; Hong, Shiming

doi:10.1016/s0032-3861(01)00438-4

Cited by 24 publications

(23 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Zachmann et al 4 assumed a low value of 300 °C. It should be mentioned that the melting point of extended chain crystals of PEN, obtained after special annealing under high pressure, was reported to be 332 °C 33. For PBN the result of about 296 °C was in agreement with the value of 294 °C reported by Lee et al 34 It should be noted that for PBN some other lower values ( ie , 276 °C and 247 °C) have been also reported in literature 24, 35.…”

Section: Resultssupporting

confidence: 84%

Melting point depression and cocrystallization behavior of poly(ethylene‐co‐butylene 2,6‐naphthalate) copolymers

Papageorgiou

Achilias

Karayannidis

2004

Polymer International

View full text Add to dashboard Cite

The melting point depression and cocrystallization behavior of a series of random poly(ethylene‐co‐butylene 2,6‐naphthalate) P(EN‐co‐BN) copolymers were investigated using differential scanning calorimetry (DSC) and wide‐angle X‐ray diffraction (WAXD). These copolymers crystallize over the entire range of composition and they exhibit eutectic behavior. WAXD patterns showed that copolymers form exclusively poly(ethylene 2,6‐naphthalate) (PEN) type crystals or poly(butylene 2,6‐naphthalate) (PBN) type crystals. A transition from the PEN‐ to PBN‐type crystal was observed in the middle of the copolymer composition. This confirms that the P(EN‐co‐BN) copolymers show isodimorphic cocrystallization. The cocrystallization was thermodynamically analyzed using the Wendling–Suter model. The defect free energy was found to be about 12.17 kJ mol−1 in the case of incorporation of BN units in the PEN‐type crystals, and about 5.66 kJ mol−1 in the case of incorporation of EN units in the PBN‐type crystal. This means that the incorporation of bulkier BN units in the PEN crystals is more difficult. For low comonomer concentrations it was found that comonomer exclusion is probable. Copyright © 2004 Society of Chemical Industry

show abstract

Section: Resultssupporting

confidence: 84%

Melting point depression and cocrystallization behavior of poly(ethylene‐co‐butylene 2,6‐naphthalate) copolymers

Papageorgiou

Achilias

Karayannidis

2004

Polymer International

View full text Add to dashboard Cite

show abstract

“…Here the straight rods are fiber-like crystals consist of extended-chain [22], and the extended direction of chains is parallel to the outspread fiber-like crystal. Many results about extended-chain lamellas have been reported in other polymers, such as PE, PTFE and PCTFE [23][24][25]. In general, polymers show fiber-like crystals or shish kebabs under shearing strength, and extended-chain lamellas under high pressure.…”

Section: Resultsmentioning

confidence: 96%

Crystalline morphologies of P(VDF-TrFE) (70/30) copolymer films above melting point

Zhu

Hua

et al. 2008

Applied Surface Science

View full text Add to dashboard Cite

“…The crystallization behavior of PET alone [7–17] and in the presence of an inorganic phase [18–27] has been studied extensively. These studies have shown that isothermal crystallization of PET occurs in two steps [10, 11].…”

Section: Introductionmentioning

confidence: 99%

Isothermal and non‐isothermal crystallization behavior of PET nanocomposites

Ghasemi

Carreau

Kamal

2011

Polymer Engineering & Sci

View full text Add to dashboard Cite

Polyethylene terephthalate (PET)/clay nanocomposites (PCNs) containing 1 wt% Cloisite 30B (C30B) were prepared via melt compounding. Modulated differential scanning calorimetry (MDSC) for isothermally crystallized samples revealed that the third endotherm at the highest temperature may be attributed to the recrystalization and melting of crystals, reorganized during heating. The first and second endotherms may be associated with melting of the secondary and primary crystals, respectively. The overall isothermal crystallization rate in PCNs was faster than in the neat resin. Growth kinetics revealed that the work required for chain folding and the equilibrium melting temperature in PCNs were somewhat higher than for neat PET. During isothermal crystallization, the steric hurdles introduced by clay layers lead to a reduction in the transport of the PET chains into crystallites. The effective non‐isothermal activation energy for the PCNs was higher than for PET, possibly leading to less perfect crystals in the PCNs. POLYM. ENG. SCI., 2012. © 2011 Society of Plastics Engineers

show abstract

Morphology of high-pressure crystallized poly(ethylene 2,6-naphthalate)

Cited by 24 publications

References 17 publications

Melting point depression and cocrystallization behavior of poly(ethylene‐co‐butylene 2,6‐naphthalate) copolymers

Melting point depression and cocrystallization behavior of poly(ethylene‐co‐butylene 2,6‐naphthalate) copolymers

Crystalline morphologies of P(VDF-TrFE) (70/30) copolymer films above melting point

Isothermal and non‐isothermal crystallization behavior of PET nanocomposites

Contact Info

Product

Resources

About