Fabrication of gradient multilayer polymer with improved damping performance based on poly(butyl acrylate)-grafted polysiloxane

Gamma radiation-induced grafting of poly(butyl acrylate) onto ethylene vinyl acetate copolymer for improved crude oil flowability

“…These characteristics make it a valuable raw material for the formulation of paints and coatings, as well as for various other applications such as adhesives 42 . Figure 3 and Table 3 present a comparative examination of the FTIR spectra which agreed with the assignments from previously reported vibrational studies for acrylic acid 43 – 45 , n-butanol 46 , 47 , and butyl acrylate 48 – 50 . The successful esterification of acrylic acid is evidenced by the shifting of the broad band of ν(C=O) from 1707 cm –1 to 1727 cm –1 , also a slight shifting in ν(C=C) was observed from 1635, 1617 cm –1 to 1636, 1620 cm –1 .…”

Composition-Orientation Induced Mechanical Synergy in Nanoparticle Brushes with Grafted Gradient Copolymers

“…Gradient copolymers are well-known for their unique physical properties, dependent on the nature of the compositional gradient. Examples are compositional heterogeneity, (potential) microphase separation, and exceptionally broad glass transition. , The latter is located between the respective glass transition temperatures of each homopolymer component, resulting in the material possessing acoustic or vibrational damping capabilities by absorbing and dissipating energy within this broad transition region. , To investigate the thermal behavior of the spontaneous gradient copolymer-grafted particle brushes, differential scanning calorimetry (DSC) was performed (Figure ). The results demonstrated that all samples exhibited significantly broad glass transition regions (Table ), with the minimum range of 56 °C (for SiO 2 M5B5) and the maximum range of 67 °C (for SiO 2 M4B6).…”

Fine-Tuning Gradient Copolymers with Diverse and Controlled Microstructure and Mechanical Properties via Monomer Sequence Distribution: An In Silico Study

“…The properties of copolymers are highly influenced by their composition and sequence distribution, which determine the microstructural morphology. − Gradient copolymers represent a novel class of copolymers that feature a gradual change in composition along the chain backbone. The composition profile of the chains gradually changes from one type of monomer to another, leading to unique properties compared to block and random copolymers. ,, For example, gradient copolymers exhibit lower interfacial tension, − a wider glass transition temperature, ,− higher transmittance in the visible light range, and high ionic conductivity. , As a result, they can be used in various applications such as compatibilizer, − damping materials, ,, shape-memory polymer materials, thermoplastic elastomers, − and drug delivery carriers. − In addition, they hold promise for use in the fields of optoelectronic materials and biomedical applications.…”

“…2,4,5 For example, gradient copolymers exhibit lower interfacial tension, 6−8 a wider glass transition temperature, 5,9−13 higher transmittance in the visible light range, 14 and high ionic conductivity. 15,16 As a result, they can be used in various applications such as compatibilizer, 17−19 damping materials, 11,20,21 shape-memory polymer materials, 10 thermoplastic elastomers, 22−25 and drug delivery carriers. 26 −28 In addition, they hold promise for use in the fields of optoelectronic materials and biomedical applications.…”