Preparation of natural bio-based Eucommia ulmoides gum/styrene-butadiene rubber composites and the evaluation of their damping and sound absorption properties

Cao, Renwei; Deng, Linhui; Feng, Zhibo; Zhao, Xiuying; Li, Xin; Zhang, Liqun

doi:10.1016/j.polymer.2020.123292

Cited by 34 publications

(30 citation statements)

References 56 publications

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“…In the matrix of various MPU/EUG composites, MPU is mainly cross-linked with EUG by the double bonds in its side chains and the number of crosslink sites was relatively low. As a result, uncross-linked EUG crystallized in the MPU/EUG matrix [ 10 ]. Meanwhile, the presence of side chains enhanced the polarity of MPU, which deteriorated the compatibility of MPU and EUG in the MPU/EUG matrix.…”

Section: Resultsmentioning

confidence: 99%

“…This was mainly because the molecular chain structure of EUG displayed trans-chain and relative regular structures. With the increase of EUG content, the trans-chain structures increased in MPU/EUG composites and the internal friction decreased [ 10 , 37 ], resulting in poor damping performance. Similar results can also be found in the literature [ 15 , 38 ].…”

Section: Resultsmentioning

confidence: 99%

“…Adding 10 content of EUG into MPU did not change the E’ of MPU/EUG composite, but with the continued increase of EUG content, the E’ of various MPU/EUG composites clearly increased from 10 6 Pa to 10 8 Pa, indicating that the E’ of various MPU/EUG composites can be regulated by changing the proportion of EUG in the composites. The crystals in EUG offered high-modulus in the MPU/EUG matrix, which could explain the above phenomena [ 10 , 39 , 40 , 41 ]. Moreover, the E’ of various MPU/EUG composites significantly decreased with the increase of EUG content when the temperature was raised above 40 °C, owing to the crystals melting in various MPU/EUG composites.…”

Section: Resultsmentioning

confidence: 99%

“…Eucommia ulmoides is a relict plant deposited by quaternary glaciers. The bark, leaves, fruits and seeds of eucommia ulmoides all contain eucommia ulmoides rubber (EUG), which is a type of bio-based polymer material [ 10 , 11 ]. EUG, an isomer of natural rubber (NR), crystallizes at room temperature by the ordered trans arrangement.…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of Millable Polyurethane Elastomer/Eucommia Ulmoides Rubber Composites with Superior Sound Absorption Performance

et al. 2021

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Sound absorbing materials combining millable polyurethane elastomer (MPU) and eucommia ulmoides rubber (EUG) were successfully fabricated via a physical blending process of EUG and MPU. The microstructure, crystallization performances, damping, mechanical and sound absorption properties of the prepared MPU/EUG composites were investigated systematically. The microstructure surface of various MPU/EUG composites became rough and cracked by the gradual incorporation of EUG, resulting in a deteriorated compatibility between EUG and MPU. With the increase of EUG content, the storage modulus (E’) of various MPU/EUG composites increased in a temperature range of −50 °C to 40 °C and their loss factor (tanδ) decreased significantly, including a reduction of the tanδ of MPU/EUG (70/30) composites from 0.79 to 0.64. Specifically, the addition of EUG sharply improved the sound absorption performances of various MPU/EUG composites in a frequency range of 4.5 kHz–8 kHz. Compared with that of pure MPU, the sound absorption coefficient of the MPU/EUG (70/30) composite increased 52.2% at a pressure of 0.1 MPa and 16.8% at a pressure of 4 MPa, indicating its outstanding sound absorption properties.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Fabrication of Millable Polyurethane Elastomer/Eucommia Ulmoides Rubber Composites with Superior Sound Absorption Performance

et al. 2021

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“…In general, the biodegradation of tyre wear is hampered by the vulcanization process and the presence of toxic additives and Zn in the tyre tread formulation [ 19 ]. Progress in biobased rubber has been reported [ 20 , 21 , 22 ]. Moreover, interesting research has been carried out on rubber desulfurization [ 23 , 24 , 25 , 26 ].…”

Section: Introductionmentioning

confidence: 99%

Degradable Elastomers: Is There a Future in Tyre Compound Formulation?

et al. 2021

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Problems related to non-biodegradable waste coming from vulcanized rubber represent one of the pre-eminent challenges for modern society. End-of-life tyres are an important source of this typology of waste and the increasingly high accumulation in the environment has contributed over the years to enhance land and water pollution. Moreover, the release into the environment of non-degradable micro-plastics and other chemicals as an effect of tyre abrasion is not negligible. Many solutions are currently applied to reuse end-of-life tyres as a raw material resource, such as pyrolysis, thermo-mechanical or chemical de-vulcanisation, and finally crumbing trough different technologies. An interesting approach to reduce the environmental impact of vulcanised rubber wastes is represented by the use of degradable thermoplastic elastomers (TPEs) in tyre compounds. In this thematic review, after a reviewing fossil fuel-based TPEs, an overview of the promising use of degradable TPEs in compound formulation for the tyre industry is presented. Specifically, after describing the properties of degradable elastomers that are favourable for tyres application in comparison to used ones, the real scenario and future perspectives related to the use of degradable polymers for new tyre compounds will be realized.

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The influence of the molecular structure of binary block‐type styrene‐butadiene rubber on dynamic mechanical properties under normal and high‐pressure conditions

Wang,

Zhang,

Liao

2024

J of Applied Polymer Sci

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Through anionic two‐stage polymerization, block‐type styrene‐butadiene rubber (SSBR) with systematically regulable low‐temperature loss peaks is successfully prepared. The influence of 1,2‐Bd unit in the soft segment of block‐type SSBR on mechanical properties, dynamic mechanical properties, and microscopic morphology is studied, while pressure factors are introduced into dynamic mechanical studies. The block‐type SSBR with a soft segment containing 21.9 wt% of 1,2‐Bd exhibits the highest tensile strength, elongation at break, and tear strength. Under atmospheric pressure, the soft segment 1,2‐Bd unit influences the dynamic mechanical properties by altering the chain segment's motion loss capability. As the mass fraction of 1,2‐Bd increases from 21.9 to 58.6 wt%, tanδmax increases, the glass transition temperature of the soft segment increases from −59.0 to −18.9°C. Additionally, influenced by thermodynamic compatibility, the microscopic morphology transitions from strong separation to weak separation. Pressure affects dynamic mechanical properties by altering the free volume of the chain segments. Pressure reduces tanδmax, increases Tg, and raises the average Tg of the soft segment by 11°C. The K value of the linear equation representing the relationship between the soft segment Tg and the mass fraction of 1,2‐Bd is unaffected by pressure.

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Preparation of natural bio-based Eucommia ulmoides gum/styrene-butadiene rubber composites and the evaluation of their damping and sound absorption properties

Cited by 34 publications

References 56 publications

Fabrication of Millable Polyurethane Elastomer/Eucommia Ulmoides Rubber Composites with Superior Sound Absorption Performance

Fabrication of Millable Polyurethane Elastomer/Eucommia Ulmoides Rubber Composites with Superior Sound Absorption Performance

Degradable Elastomers: Is There a Future in Tyre Compound Formulation?

The influence of the molecular structure of binary block‐type styrene‐butadiene rubber on dynamic mechanical properties under normal and high‐pressure conditions

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