Polyesteramides based on PET and nylon 2,T Part 3. Properties

Bouma, K.; Wit, G. de; Lohmeijer, Jan; Gaymans, R.J.

doi:10.1016/s0032-3861(99)00527-3

Cited by 21 publications

(13 citation statements)

References 12 publications

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“…(for C << 1) (6) where Pp and Pw are the densities of dried polymer and water, respectively, and C is the concentration of absorbed water which is assumed to be low. From eqs 4-6 we have…”

Section: Frequency Dispersion Of Young's Modulus Affected By Relativementioning

confidence: 99%

Moisture Effect on Structure and Mechanical Property of Nylon 6 as Studied by the Time-Resolved and Simultaneous Measurements of FT-IR and Dynamic Viscoelasticity under the Controlled Humidity at Constant Scanning Rate

Zhou

Tashiro

Tadaoki

2001

Polym J

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“…(for C << 1) (6) where Pp and Pw are the densities of dried polymer and water, respectively, and C is the concentration of absorbed water which is assumed to be low. From eqs 4-6 we have…”

Section: Frequency Dispersion Of Young's Modulus Affected By Relativementioning

confidence: 99%

Moisture Effect on Structure and Mechanical Property of Nylon 6 as Studied by the Time-Resolved and Simultaneous Measurements of FT-IR and Dynamic Viscoelasticity under the Controlled Humidity at Constant Scanning Rate

Zhou

Tashiro

Tadaoki

2001

Polym J

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“…Enhancement of crystallization rate of PET is generally achieved through the addition of minerals such as talc or organic acid salts such as sodium benzoate. Other nucleating agents that have been mentioned in the literature include metal oxides and hydrides, residual catalysts and diamide segments [4][5][6]. Several workers have reported the use of nanoparticles, such as organically modified nanoclays as crystallization promoters for a variety of polymers [7,8].…”

Section: Introductionmentioning

confidence: 99%

Carbon nanotubes induced crystallization of poly(ethylene terephthalate)

Anand

Agarwal

Joseph

2006

Polymer

137

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We have investigated the crystallization characteristics of melt compounded nanocomposites of poly(ethylene terephthalate) (PET) and single walled carbon nanotubes (SWNTs). Differential scanning calorimetry studies showed that SWNTs at weight fractions as low as 0.03 wt% enhance the rate of crystallization in PET, as the cooling nanocomposite melt crystallizes at a temperature 10 °C higher as compared to neat PET. Isothermal crystallization studies also revealed that SWNTs significantly accelerate the crystallization process. WAXD showed oriented crystallization of PET induced by oriented SWNTs in a randomized PET melt, indicating the role of SWNTs as nucleating sites.

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“…A special case of polyester‐diamide copolymers concerns materials in which the amide is a monodisperse diamide with a length of only 1.5 repeat units 7–11. Copolymers of poly(ethylene terephthalate) (PET),9, 10 poly(butylene terephthalate) (PBT),7, 8 and poly(hexamethylene terephthalate) (PHT)11 comprising diamide units of similar structure have been found to display enhanced crystallinities, dimensional stabilities, and melting temperatures as opposed to their neat polyester counterparts. These polyester‐amide copolymers had a single glass transition temperature ( T g ) and one melting temperature ( T m ).…”

Section: Introductionmentioning

confidence: 99%

“…The rate of crystallization is often quantified by the value of undercooling ( T m − T c ) as determined in DSC experiments at a scan rate of 20°C/min. Upon modification of PET with 10 wt % diamide units, the T m − T c value has been seen to decrease from 56 to 49°C,9 and the corresponding decrease for PBT was from 36 to 30°C 8. The diamide units had a crystal structure differing from that of the polyester and were expected to crystallize adjacent to the polyester segments 8.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the drawability of a polyester by copolymerization with a second type of crystallizable block

Gaymans

Swaaij

2010

J of Applied Polymer Sci

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A polyester-amide segmented block copolymer with short monodisperse amide segments was synthesized along with its neat polyester counterpart. The copolymer, containing 10 wt % amide, displayed a T g and T m for the polyester phase as well as a high T m corresponding to the polyamide. The high-melting amide segments enhanced the dimensional stability of the copolymer and also considerably increased the crystallization rate of the polyester segments. As compared to the neat polyester, the polyester-amide block copolymer could be drawn at higher temperatures and to higher draw ratios. The maximum draw ratio for this copolymer was obtained just a few degrees below the melting temperature of the polyester segments, and as a result of these higher draw ratios, the fracture stresses were higher. In conclusion, a short monodisperse amide segment in a polyester-amide block copolymer increased the crystallization rate of the polyester, enhanced the dimensional stability, allowed a higher maximum draw ratio, and raised the fracture strength.

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Polyesteramides based on PET and nylon 2,T Part 3. Properties

Cited by 21 publications

References 12 publications

Moisture Effect on Structure and Mechanical Property of Nylon 6 as Studied by the Time-Resolved and Simultaneous Measurements of FT-IR and Dynamic Viscoelasticity under the Controlled Humidity at Constant Scanning Rate

Moisture Effect on Structure and Mechanical Property of Nylon 6 as Studied by the Time-Resolved and Simultaneous Measurements of FT-IR and Dynamic Viscoelasticity under the Controlled Humidity at Constant Scanning Rate

Carbon nanotubes induced crystallization of poly(ethylene terephthalate)

Enhancing the drawability of a polyester by copolymerization with a second type of crystallizable block

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