Nonisothermal Crystallization Behaviour of a Novel Cycloaliphatic Microcrystalline Poly(4,4'-Aminocyclohexyl Methylene Dodecanedicarboxylamide)

Dong, Jianting; Fan, Zhongyong

doi:10.1177/096739111402200406

Cited by 2 publications

(1 citation statement)

References 31 publications

(33 reference statements)

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“…The thermal results of the copolymers are displayed in Figure 3 and Table S1 . As displayed in Figure 4 a, the crystallization peak of the copolymer exhibited a significant reduction in the crystallization temperature compared with the PA66 matrix due to the presence of the rigid cyclic structure in PACM6 that hindered the motions of the polymer chains during the crystallization process, which further affected the crystallization ability of molecular chains as a result [ 39 ]. Moreover, the crystallinity of the synthesized copolymer decreased from 28.3% to 15.6% ( Figure 4 b and Table S1 ), indicating that the crystallizing ability of the copolymer was much lower than that of PA66, which was ascribed to the random polymerization of PA66/PACM6 that reduced the regularity of the molecular chain alignment.…”

Section: Resultsmentioning

confidence: 99%

An Intrinsically Transparent Polyamide Film with Superior Toughness and Great Optical Performance

Li,

Yi,

Wang

et al. 2024

Polymers

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Polyamide 66 was extensively utilized in various applications contributed by its excellent mechanical performance and outstanding durability. However, its high crystallinity renders it to have low transparency, which seriously limits its application in optical devices. Herein, a highly transparent polyamide (PA) 66-based copolymer was reported using 4,4′-diaminodicyclohexylmethane (PACM), adipic acid, and polyamide 66 salt as the reaction monomers. Wide-angle X-ray diffraction (WAXD) analysis revealed that the crystal phase of the synthesized PA66/PACM6 displayed a clear transition from α to γ as the PACM6 increased accompanied by a decreased intensity in the diffraction peak of the copolymer, whose transmittance was successfully adjusted reaching as high as 92.5% (at 550 nm) when the PACM6 was 40 wt%. Moreover, the copolymer with a higher content of PACM6 exhibited larger toughness. On the other hand, the biaxially oriented films of PA66/PACM6 (20 wt%) were also prepared, and it was found that the transparency of the PA66/PACM6 copolymer could be further enhanced via adjusting the stretching ratio of the film. Furthermore, the mechanical strength of the biaxially oriented PA66/PACM6 was also improved with the increase in the orientation degree in the stretching process, indicating that the physical properties of the transparent PA66 were significantly influenced by its alicyclic structure, and the introduction of PACM into PA66 was capable of effectively improving the optical and crystalline characteristics of PA66, revealing that the synthetic strategy has great potential for guiding the design and development of transparent polyamide materials.

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Section: Resultsmentioning

confidence: 99%

An Intrinsically Transparent Polyamide Film with Superior Toughness and Great Optical Performance

Li,

Yi,

Wang

et al. 2024

Polymers

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Transparent semi‐crystalline polymeric materials and their nanocomposites: A review

Lin

Bilotti

Bastiaansen

et al. 2020

Polymer Engineering & Sci

125

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Optical transparency is an important property for a material, especially in certain fields like packaging, glazing, and displays. Existing commercial transparent polymeric materials are mostly amorphous. Semicrystalline polymers have often-superior chemical resistance and mechanical properties particularly at elevated temperatures or after solid-state drawing but they appear opaque or white in most cases. This review describes the present state-of-the-art of methodologies of fabricating optically transparent materials from semicrystalline polymers. A distinction is made between isotropic, biaxially stretched, and uniaxially stretched semicrystalline polymers. Furthermore, some functionalities of transparent nanocomposites based on semicrystalline polymers are also discussed. This review aims to provide guidelines regarding the principles of manufacturing transparent high-performance semicrystalline polymers and their nanocomposites for potential applications in fields like packaging, building, and construction, aerospace, automotive, and opto-electronics.

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Nonisothermal Crystallization Behaviour of a Novel Cycloaliphatic Microcrystalline Poly(4,4'-Aminocyclohexyl Methylene Dodecanedicarboxylamide)

Cited by 2 publications

References 31 publications

An Intrinsically Transparent Polyamide Film with Superior Toughness and Great Optical Performance

An Intrinsically Transparent Polyamide Film with Superior Toughness and Great Optical Performance

Transparent semi‐crystalline polymeric materials and their nanocomposites: A review

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