Nylon 6/66/11 Copolymer Used for Hot-Melt Adhesives: Synthesis and Properties

Jin, Xudong; Hu, Guosheng; Yang, Yang; Zhou, Xiumiao; Wang, Biaobing

doi:10.1163/156856108x396282

Cited by 17 publications

(7 citation statements)

References 12 publications

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“…However, low T m copolaymides are especially suitable for hot melt adhesive applications. In addition, amorphous polymers have a lower softening temperature ( T s ) and improved solubility with respect to crystalline analogs, enabling their application in the fields of films, gas-separation membranes, coatings, engineering plastics, polymer blends, and composites [18,19,20]. Compared with binary polymers, copolymers usually have more interesting and comprehensive properties.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Low Melting Temperature Aliphatic-Aromatic Copolyamides Derived from Novel Bio-Based Semi Aromatic Monomer

et al. 2018

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This work investigated the synthesis of a novel low melting temperature polyamide 6 (PA6) copolyamide (PA6-BABT/SA) with different aliphatic/aromatic units weight content using a melt poly-condensation process. The bio-based aromatic N1,N4-bis(4-aminobutyl) terephthalamide diamine (BABT) and long-chain aromatic polyamide salt (BABT/SA, salt of BABT, and sebacic acid), components used for the synthesis of copolyamides, were obtained from bio-based monomers. For the first time, the pertinent BABT/SA aromatic polyamide salt was isolated as a white solid and completely characterized. By varying the weight ratio of BABT/SA salt, a series of copolyamides with different molecular weights and physical properties were prepared. The aromatic BABT/SA salt disrupted crystallization of the final copolyamides and lowered the onset of melting. The Fourier transform infrared spectroscopy and X-ray diffraction results indicated a steady decrease in the degrees of crystallinity with increasing BABT/SA salt segment ratio. Furthermore, compared to neat PA6, the obtained PA6-BABT/SA copolymers possessed a similar thermal stability and high transparency, but lower glass transition temperature around human body temperature. The PA6-BABT/SA copolymers with number-average molecular weight ≥30,000 Da presented good mechanical properties, specifically showing excellent tensile strength and elongation at break up to 105.2 MPa and 218.3%, respectively.

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Section: Introductionmentioning

confidence: 99%

Synthesis of Low Melting Temperature Aliphatic-Aromatic Copolyamides Derived from Novel Bio-Based Semi Aromatic Monomer

et al. 2018

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“…Neat CO‐PA shows a wide diffraction peak around 2θ = 21° corresponding to the (100) crystal planes of the γ ‐phase. Comparatively, the sharp diffraction peak at 2θ = 20.1° and the wide diffraction peak at 2θ = 22.8° for the GO‐EDA/CO‐PA nanocomposites corresponds to the α ‐phase indicating the formation of a more stable crystal. We infer that there are specific interactions between aminos on modified GO sheets and carboxyls on CO‐PA, which can induce chains to form α‐phase by providing nucleation sites.…”

Section: Resultsmentioning

confidence: 95%

“…It has excellent durability, strength, chemical resistance, wear resistance, and flexibility. Jin et al successfully produced co‐polyamide (CO‐PA) from aminoundecanoic acid, caprolactam, and nylon 66 salt. CO‐PA has a low melting point and good machining performance among other good qualities versus common engineering plastics (nylon 6 and nylon 66).…”

Section: Introductionmentioning

confidence: 99%

Thermal stability and mechanical properties of ethylenediamine‐modified GO/co‐polyamide nanocomposites

et al. 2018

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We describe ethylenediamine‐modified graphene oxide (GO)/co‐polyamide (GO‐EDA/CO‐PA) nanocomposites prepared via solution blending with EDA‐modified GO (GO‐NH2/EDA). GO was prepared via the improved Hummers method, and EDA was used to modify the GO to add amine groups to graphene. X‐ray diffraction, Fourier‐transform infrared spectroscopy and atomic force microscope analysis showed that the thickness of GO‐NH2/EDA was 1.2 nm. Amino functional groups were introduced onto the GO sheets. Due to the steric hindrance effect of the amino on modified graphene as well as the strong, specific interactions between aminos and carboxyls on CO‐PA, the GO‐NH2/EDA filler was homogeneously dispersed in the matrix, and the interface reaction was effectively improved. The GO‐NH2/EDA could change the crystal structure of pure nylon and the glass transition temperature (Tg). The mechanical properties of the nanocomposites increased dramatically when the GO‐NH2/EDA content is 0.6 wt%. The tensile strength and yield strength of the nanocomposites increased by 50.3 and 134.8%, respectively. The effects of interfacial interaction, increased crystallization, and prevention of agglomeration of GO‐NH2/EDA improved the thermal properties of the GO‐EDA/CO‐PA nanocomposites. This is because the 50% thermal degradation temperature (T‐50%) and the thermal degradation temperature (Td,max) of the nanocomposites increased by 16 and 15°C when the GO‐NH2/EDA content is 0.8 wt%. The nano‐filler improves the thermal diffusivity of the nylon matrix at low temperature. POLYM. COMPOS., 40:3315–3324, 2019. © 2018 Society of Plastics Engineers

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“…Conventional aliphatic polyamides with more amide functional groups and high chain regularity result in higher melting temperatures, rapid crystallization rates, and higher crystallinity, which limit their applications. Currently, polyamides with low melting temperatures have received considerable attention due to their superior physical properties and are potentially used worldwide in foaming materials, hot melt adhesives, fusible yarns, and other products [ 9 , 10 , 11 ]. Several modification approaches have been used to improve the properties of polyamides; copolymerization is often used to reduce the melting temperature of polyamides.…”

Section: Introductionmentioning

confidence: 99%

Effect of Bis (2-Aminoethyl) Adipamide/Adipic Acid Segment on Polyamide 6: Crystallization Kinetics Study

et al. 2020

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The crystallization behavior of novel polyamide 6 (PA6) copolyamides with different amounts of bis (2-aminoethyl) adipamide/adipic acid (BAEA/AA) segment was investigated. The wide-angle X-ray diffraction (WAXD) results showed that as the amount of BAEA/AA segment increased to 10 mole%, the crystalline forms of all PA6 copolyamide were transferred from the stable α-form to the unstable γ-form because of the complex polymer structure. According to studies of crystallization kinetics, the Avrami exponent (n) values for all copolyamide samples ranged from 1.43 to 3.67 under isothermal conditions, implying that the crystallization is involved in the two- to three-dimensional growth at a high temperature of isothermal condition. The copolyamides provided a slower crystallization rate and higher crystallization activation energy (ΔEa) than neat PA6. Polyamide containing 10 mole% of BEAE/AA content exhibited a unique crystallization behavior in the coexistence of the α and γ forms. These results deepen our understanding of the relationship between BAEA/AA content, crystal structure, and its crystallization behavior in low-melting PA6, and they make these types of copolyamides useful for their practical application.

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Nylon 6/66/11 Copolymer Used for Hot-Melt Adhesives: Synthesis and Properties

Cited by 17 publications

References 12 publications

Synthesis of Low Melting Temperature Aliphatic-Aromatic Copolyamides Derived from Novel Bio-Based Semi Aromatic Monomer

Synthesis of Low Melting Temperature Aliphatic-Aromatic Copolyamides Derived from Novel Bio-Based Semi Aromatic Monomer

Thermal stability and mechanical properties of ethylenediamine‐modified GO/co‐polyamide nanocomposites

Effect of Bis (2-Aminoethyl) Adipamide/Adipic Acid Segment on Polyamide 6: Crystallization Kinetics Study

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