Relaxation behavior of layered double hydroxides filled dangling chain-based polyurethane/polymethyl methacrylate nanocomposites

Yu, Wenwen; Du, Ming; Ye, Weijuan; Lv, Weiyang; Zheng, Qiang

doi:10.1016/j.polymer.2014.03.039

Cited by 23 publications

(13 citation statements)

References 43 publications

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“…Layered double hydroxyde (LDH) has significant effects on the molecular dynamics of PMMA/PU nanocomposites (92).…”

Section: Thermoplastic-elastomer Polymer Blend Nanocompositesmentioning

confidence: 99%

Polyblend Nanocomposites

Feldman¹

2015

Journal of Macromolecular Science, Part A

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Blending polymers is used to obtain products with improved and wider range of properties. A polymer blend or polyblend is a microscopically mixture of two or more polymers. This paper deals with polyblend nanocomposites where one of the components has at least one dimension of the order of nanometer. It covers different groups of nanocomposites depending on the type of the polymer used in such mixtures, mainly:thermoplastic -thermoplastic polymer blend nanocomposites, thermoplastic -thermoset polymer blend nanocomposites, thermoplastic -elastomer polymer blend nanocomposites, biodegradable polymer blend nanocomposites.

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“…Layered double hydroxyde (LDH) has significant effects on the molecular dynamics of PMMA/PU nanocomposites (92).…”

Section: Thermoplastic-elastomer Polymer Blend Nanocompositesmentioning

confidence: 99%

Polyblend Nanocomposites

Feldman¹

2015

Journal of Macromolecular Science, Part A

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“…[4][5][6][7] Naturally, there are generally several methods to improve the damping properties of PU, such as blending, nanocomposites, interpenetrating polymer networks, and dangling chain modification. [8][9][10][11] And the addition of dangling chain is currently exerting a tremendous fascination on researchers. Additionally, dangling chain refers to a molecular chain with monofunctional group that can swing freely.…”

Section: Introductionmentioning

confidence: 99%

Preparation of polyurethanes with broad damping temperature range and self-healing properties

Sheng

et al. 2019

Journal of Elastomers & Plastics

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It is urgent for polyurethane (PU) damping materials to broaden the effective damping range. Based on the designability of PU, this study is focused on the role of long dangling chain, wherein prepared by the reaction of polyethylene glycol monomethyl ether with toluene-2,4-diisocyanate. Notably, the introduction of long dangling chain not only makes the dangling chain longer and enhances the intermolecular interaction but also equips the dangling chain with strong polar carbamate group, bringing about more excellent compatibility of the soft and hard segments and lower degree of microphase separation under the condition of hydrogen bonding. The results show that the damping performance increases with the synergistic effect of significant hydrogen bonding and decreased degree of microphase separation, and the effective damping temperature range (tan δ ≥ 0.3) can exceed 150°C (−50°C to 100°C). Simultaneously, the addition of long dangling chains endows PU with self-healing property, the self-healing rate of system reaches maximum 70% with shore A hardness of 15 because of the synergistic effect above with the addition of 60% dangling chain, which extends the service life of PU damping materials.

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“…Besides, other modification methods such as bringing in chain modification are being explored . In the damping material, macromolecular segments will respond timely to the external reaction, and the movement of the macromolecular chain needs to overcome the internal friction resistance between segments.…”

Section: Introductionmentioning

confidence: 99%

Damping elastomer with broad temperature range based on irregular networks containing hyperbranched polyester and dangling chains

Zhou

2018

Polymers for Advanced Techs

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Elastomer is one of the important materials for vibration and noise reduction.However, its narrow effective damping temperature range (tanδ ≥ 0.3) remains to be a major issue that hinders its application as a damping material. Herein, we precisely design and synthesize a polyurethane structure where specific dangling chains with both electron-donating group and electron-absorbing group were introduced into prepolymers, generating more hydrogen bonding interaction with the main chain to hinder microphase separation. At the same time, hyperbranched polyester as a cross-linking agent increases its free volume effectively. The synergy effect of enhancement of hydrogen bonding, decrease of microphase separation, and increase of free volume results in a higher damping polyurethane elastomer with a great wider effective damping temperature range up to 175°C (−60°C-115°C), which provides a new idea for the preparation of damping elastomer.

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Relaxation behavior of layered double hydroxides filled dangling chain-based polyurethane/polymethyl methacrylate nanocomposites

Cited by 23 publications

References 43 publications

Polyblend Nanocomposites

Polyblend Nanocomposites

Preparation of polyurethanes with broad damping temperature range and self-healing properties

Damping elastomer with broad temperature range based on irregular networks containing hyperbranched polyester and dangling chains

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