Rheological properties of poly(trimethylene 2,6-naphthalenedicarboxylate) melts

Stier, Ulli; Schawaller, Dirk

doi:10.1016/s0032-3861(01)00448-7

Cited by 13 publications

(3 citation statements)

References 14 publications

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“…Poly(trimethylene 2,6-naphthalate) (PTN) is another PDO-based aromatic polyester which has potential applications for special barrier films and packaging due to its excellent oxygen and carbon dioxide gas barrier property . Even though several studies for PTN such as synthesis, rheological properties, fiber properties, melt and crystallization behaviors, crystal structural, and surface-induced crystal orientation, etc., have been reported so far, a fundamental understanding of structure formations of PTN is very limited for tailoring and optimization of their properties.…”

Section: Introductionmentioning

confidence: 99%

Conformational Identification and Phase Transition Behavior of Poly(trimethylene 2,6-naphthalate) α-Form Modification

Liang

Lee

2015

Macromolecules

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Poly(trimethylene 2,6-naphthalate) (PTN) is one of the 1,3-propanediol (PDO)-based aromatic polyesters which has potential applications for special barrier films and packaging due to its excellent oxygen and carbon dioxide gas barrier property. In this work, we investigated the chain conformation and phase transition behavior of poly(trimethylene 2,6-naphthalene) (PTN) α-form crystal with synchrotron wide- and small-angle X-ray scattering (WAXS and SAXS), attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy, and differential scanning calorimetry (DSC) methods. ATR-FTIR results showed that the infrared bands at 1327 and 987 cm–1 were sensitive to PTN α-form crystalline phase and were assigned to trans conformers of trimethylene group, whereas the infrared bands at 1357 and 1372 cm–1 were sensitive to PTN β-form crystalline phase and were assigned to gauche conformers of the trimethylene group. The results showed that the conformation of trimethylene glycol residue in PTN α-form crystalline phase adopted G′TTG or GTTG′ conformation. The DSC, WAXS, SAXS, and ATR-FTIR results indicate that the PTN α-form crystal undergoes structure changes at above 170 °C. We found that the PTN α-form crystal can transform to more stable crystalline phase (named as α′-form) by annealing. The crystal changes of PTN α-form crystal are associated with interchains rearrangement rather than with conformation changes of trimethylene glycol residue. The interchains rearrangement in PTN α-form crystalline phase may be caused by the internal force field change generated by the surface recrystallization process.

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Section: Introductionmentioning

confidence: 99%

Conformational Identification and Phase Transition Behavior of Poly(trimethylene 2,6-naphthalate) α-Form Modification

Liang

Lee

2015

Macromolecules

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“…PTN's high potential for use as an engineering plastic has recently been recognized, leading to the instigation of many studies on its crystal structure, crystallization, melting behavior, polymerization kinetics, characterization, rheological, and thermal properties [4][5][6][7][8][9][10]. Nevertheless, to the best of our knowledge, no studies have been published on the hydrophilic modification of PTN.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and hydrophilicity of poly(trimethylene 2,6-naphthalate)/poly(ethylene glycol) copolymers

Son

2008

Fibers Polym

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Poly(trimethylene 2,6-naphthalate) (PTN)/poly(ethylene glycol) (PEG) copolymers were synthesized by the twostep melt copolymerization process of dimethyl-2,6-naphthalenedicarboxylate (2,6-NDC) with 1,3-propanediol (PD) and PEG. The copolymers produced had different PEG molecular weights and contents. The structure, thermal property, and hydrophilicity of these copolymers were studied by proton nuclear magnetic resonance ( 1 H-NMR) analysis, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and by contact angle, moisture content, and instantaneous elastic recovery measurements. The intrinsic viscosity and the instantaneous elastic recovery of the PTN/PEG copolymers increased with increasing PEG molecular weight and content, whereas the glass transition, melting, and cold crystallization temperatures, and the heat of fusion of the PTN/PEG copolymers all decreased with increasing PEG molecular weight or content. The thermal stability of the copolymers was not affected by PEG molecular weight or content. The hydrophilicity, as determined by contact angle and moisture content measurements of the copolymer films, was significantly improved with increasing PEG molecular weight and content.

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“…Tsai and Lee 16 showed by differential scanning calorimetry (DSC) that the melting point and glass‐transition temperature of PTN are 204 and 83°C, respectively. Our group recently studied the synthesis 17, 18 and rheological properties 19 of PTN in detail. In this article, we focus on a systematic study of fibers to explore the structure–property relationship in the dependence of winding speed.…”

Section: Introductionmentioning

confidence: 99%

Effect of winding speed on the structure and properties of as‐spun poly(trimethylene 2,6‐naphthalenedicarboxylate) fibers as compared to poly(ethylene terephthalate) fibers

Stier

2002

J of Applied Polymer Sci

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: We present a comparative study of melt spinning of poly(trimethylene 2,6-naphthalenedicarboxylate) (PTN) and poly(ethylene terephthalate) (PET) fibers with respect to the effect of winding speed (2000 -6000 m/min): Structural changes were followed by X-ray analysis, calorimetry, and measurements of density, boiling water shrinkage, and birefringence. As-spun PTN fibers exhibited a low degree of crystallinity at relatively low speeds (Ͻ 2000 m/min). An increase in winding speed up to 6000 m/min only resulted in a minor enhancement of crystallinity and orientation. The small change of structural parameters accounted for the fact that tenacity and modulus did not rise significantly with increasing winding speed, contrary to the PET fibers.

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Rheological properties of poly(trimethylene 2,6-naphthalenedicarboxylate) melts

Cited by 13 publications

References 14 publications

Conformational Identification and Phase Transition Behavior of Poly(trimethylene 2,6-naphthalate) α-Form Modification

Conformational Identification and Phase Transition Behavior of Poly(trimethylene 2,6-naphthalate) α-Form Modification

Synthesis and hydrophilicity of poly(trimethylene 2,6-naphthalate)/poly(ethylene glycol) copolymers

Effect of winding speed on the structure and properties of as‐spun poly(trimethylene 2,6‐naphthalenedicarboxylate) fibers as compared to poly(ethylene terephthalate) fibers

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