Effect of phenyl content, sample thickness and compression on damping performances of silicone rubber: A study by dynamic mechanical analysis and impact damping test

Yu, Fengmei; Lu, A.; Lu, Junliang; Wang, Zhiyong; Zhang, Qian; Geng, Chengzhen; Li, Zhong‐Ming

doi:10.1016/j.polymertesting.2019.106101

Cited by 31 publications

(15 citation statements)

References 26 publications

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“…Dynamic mechanical analysis (DMA) was to evaluate the damping properties of SR and PMMA/SR blends 26,27 . The loss factor (tan δ ) is defined as the ratio of loss modulus ( E" ) over storage modulus ( E' ), and lager peak area of tan δ indicated better damping performance 32 .…”

Section: Resultsmentioning

confidence: 99%

“…Dynamic mechanical analysis (DMA) was to evaluate the damping properties of SR and PMMA/SR blends. 26,27 The loss factor (tan δ) is defined as the ratio of loss modulus (E") over storage modulus (E'), and lager peak area of tan δ indicated better damping performance. 32 The loss factor -temperature curve of SR and PMMA/SR blends with different PMMA proportions were presented in Figure 12(b).…”

Section: Damping Properties Of Silicon Rubber and Pmma/sr Blendsmentioning

confidence: 99%

“…On the other hand, silicone rubber is widely used as damping materials in aviation, aerospace and nuclear facilities, for its weather‐resistant, radiation‐resistant, and thermally stability 26 . Silicone rubber has good damping performance at a temperature lower than 0°C, but poor damping effect at high temperature, usually the tan δ around/above room temperature is less than 0.1 27,28 .…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, silicone rubber is widely used as damping materials in aviation, aerospace and nuclear facilities, for its weather-resistant, radiation-resistant, and thermally stability. 26 Silicone rubber has good damping performance at a temperature lower than 0 C, but poor damping effect at high temperature, usually the tan δ around/above room temperature is less than 0.1. 27,28 Therefore, efforts have been devoted to improve the damping properties of silicone rubber, such as, polymers blending, 27,29 interpenetrating polymer networks, 30 copolymerization and introduction of fillers/additives into polymer systems.…”

mentioning

confidence: 99%

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Role of in‐situ polymethyl‐methacrylate in addition type silicone rubber with specific reference to adhesion and damping properties

Huang

Dai

Chen

et al. 2020

J of Applied Polymer Sci

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Herein, a strategy of embedding in‐situ polymethyl‐methacrylate (PMMA) domains in polydimethylsiloxane (PDMS) networks is proposed to enhance adhesive and damping properties of addition type silicone rubber (SR). PMMA domains improve the modulus of SR (at room temperature), which is stronger correlated to its adhesive performance, according to the Griffith criterion. Besides, the damping performance at high temperature is provided by the glass transition of thermoplastic PMMA. The PMMA/SR blends are obtained by the crosslink of PMMA and vinyl‐terminated polydimethylsiloxane (vi‐PDMS) liquid blends with polymethylhydrosiloxane, and the PMMA/vi‐PDMS liquid blends are prepared by in‐situ radical polymerization of methyl‐methacrylate (MMA) in vi‐PDMS with toluene as compatibilizer. Effects of disperse speed, compatibilizer content, and PMMA proportion on the morphologies and properties of PMMA/SR blends are studied. Small PMMA domains (around 800 nm) in PMMA/vi‐PDMS blends with narrow size distribution and well dispersion are formed at appropriate disperse speed (100–300 rpm) and abundant compatibilizer content (~100 wt% refers to vi‐PDMS). The blends with 20 wt% PMMA possess tensile strength over 8 MPa and lap shear strength over 5 MPa to stainless steel. And the blends with 50 wt% PMMA show good damping properties with tan δ over 0.15 at temperature range from −50 to 150°C. Tg‐PMMA moves slightly to lower temperature with less PMMA embedded, but Tg‐PDMS remained stable relatively.

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Section: Resultsmentioning

confidence: 99%

Section: Damping Properties Of Silicon Rubber and Pmma/sr Blendsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Role of in‐situ polymethyl‐methacrylate in addition type silicone rubber with specific reference to adhesion and damping properties

Huang

Dai

Chen

et al. 2020

J of Applied Polymer Sci

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“…Chyuan Chou et al reported that the thermal stability of copolymers was significantly improved with incorporating Ph 2 SiO units, and different monomer sequences provided independent operational control for preparing materials with specific thermal property requirements [7]. Fengmei Yu et al reported that the loss tangent (tanδ) peak area and glass transition temperature (T g ) of random copolymers increased linearly with an increase in the number of Ph 2 SiO units, which indicated that a better damping property could be obtained with higher phenyl contents [8]. Despite the progress made by experiments such as those as mentioned above, the interaction mechanisms, microstructures, and conformational transformations of copolymers are rarely reported; this is especially the case for those with high phenyl units content (the ratio of phenyl to silicon >30 mol %), in which the sequence distributions and interactions are more complicated.…”

Section: Introductionmentioning

confidence: 99%

Molecular Insights into Sequence Distributions and Conformation-Dependent Properties of High-Phenyl Polysiloxanes

Zhu

Cheng

et al. 2019

Polymers

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The excellent performance and wide applications of phenyl polysiloxanes are largely due to their phenyl units and monomer sequences. However, the relationship between molecular structure and material properties has not been explicitly elucidated. In this work, the sequence distribution and microstructure of random copolymers were quantitatively investigated by means of a molecular dynamics (MD) simulation combined with experimental verification. The results of 29Si NMR showed that the large number of phenyl units not only shortened the length of the dimethyl units, but also significantly increased the proportion of consecutive phenyl units. The simulation results indicated the attraction between adjacent phenyl groups that were effectively strengthened intra- and inter- molecular interactions, which determined the equilibrium population of conformations and the dynamics of conformational transitions. Furthermore, the evolution of bond angle distribution, torsion distribution, and mean-squared displacements (MSD) shed light on the conformational characteristics that induce the unique thermodynamics properties and photophysical behavior of high-phenyl polysiloxanes. Differential scanning calorimetry (DSC), dynamical mechanical analysis (DMA), spectrofluorimetry, and laser scanning confocal microscopy (LSCM) were performed to verify the conclusions drawn from the simulation. Overall, the complementary use of MD simulations and experiments provided a deep molecular insight into structure–property relationships, which will provide theoretical guidance for the rational design and preparation of high-performance siloxanes.

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Ultra‐Damping Composites Enhanced by Yolk–Shell Piezoelectric Damping Mechanism

Zheng

Sun

Xu³

et al. 2023

Adv Funct Materials

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High‐performance damping materials are significant toward reducing vibration and maintaining stability for industrial applications. Herein, a yolk–shell piezoelectric damping mechanism is reported, which can enhance mechanical energy dissipation and improve damping capability. With the addition of yolk–shell particles and carbon nanotube (CNT) conductive network, damping properties of various resin matrices are enhanced with the energy dissipation path of mechanical to electrical to heat energy. Particularly, the peak loss factor of epoxy composites reaches 1.91 and tan δ area increases by 25.72% at 20 °C. The results prove the general applicability of yolk–shell piezoelectric damping mechanism. Besides, the novel damping materials also exhibit excellent flexibility, stretchability, and resilience, offering a promising application toward damping coating, indicating broad scope of application in transportation and sophisticated electronics, etc.

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Effect of phenyl content, sample thickness and compression on damping performances of silicone rubber: A study by dynamic mechanical analysis and impact damping test

Cited by 31 publications

References 26 publications

Role of in‐situ polymethyl‐methacrylate in addition type silicone rubber with specific reference to adhesion and damping properties

Role of in‐situ polymethyl‐methacrylate in addition type silicone rubber with specific reference to adhesion and damping properties

Molecular Insights into Sequence Distributions and Conformation-Dependent Properties of High-Phenyl Polysiloxanes

Ultra‐Damping Composites Enhanced by Yolk–Shell Piezoelectric Damping Mechanism

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