Glass transition temperatures of butyl acrylate-methyl methacrylate copolymers

Cuervo-Rodríguez, Rocío; Madruga, Enrique López

doi:10.1002/(sici)1099-0488(19990901)37:17<2512::aid-polb22>3.0.co;2-2

Cited by 46 publications

(31 citation statements)

References 22 publications

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“…It is hence obtained by the trial and error method, which achieves the best fit of the experimental data to the theoretical curves. The attained value of T g12 is 268.0 K. This value is 21.5 K lower than that found for MMA-BA copolymers synthesized conventionally in benzene, [24] which was expected since the molecular weight is at least 100 times smaller than in the classical case.…”

Section: Resultsmentioning

confidence: 66%

“…The glass transition temperatures of copolymers with f MMA = 0.5 synthesized by conventional copolymerization [24] (M -n A 800000) along with those from this work are exhibited in Figure 7. The thermal behavior with the conversion is very similar in all cases; however, it is evident that the temperatures decreased with the molecular weight of the copolymers.…”

Section: Resultsmentioning

confidence: 86%

“…It is important to note that these values are lower than those obtained for the corresponding homopolymers synthesized under classical conditions. [24] This is due to the different molecular weight, since T g increases with molecular weight.…”

Section: Resultsmentioning

confidence: 99%

“…Figure 7. Glass transition temperature of copolymers with f MMA = 0.5 synthesized via conventional [24] and controlled radical polymerization performed in benzonitrile solution (25% v/v) at 100 8C. …”

Section: Resultsmentioning

confidence: 99%

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Glass Transition Temperatures of Poly[(methyl methacrylate)-co-(butyl acrylate)]s Synthesized by Atom-Transfer Radical Polymerization

Fuente

Fernández-Sanz

Madruga

2001

Macromol. Rapid Commun.

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Section: Resultsmentioning

confidence: 66%

Section: Resultsmentioning

confidence: 86%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Glass Transition Temperatures of Poly[(methyl methacrylate)-co-(butyl acrylate)]s Synthesized by Atom-Transfer Radical Polymerization

Fuente

Fernández-Sanz

Madruga

2001

Macromol. Rapid Commun.

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“…A similar observation was also observed in the PVA-co-PVAc block copolymer. 16 In the random copolymer system, the hydroxyl groups have better opportunity to interact with carbonyl groups than the blocky copolymer. Therefore, the random copolymer has the higher fraction of hydrogen-bonded carbonyl group; for example, at 50 wt % of PVPh, the fraction of hydrogen-bonded carbonyl groups in the PVPh-co-PAS random copolymer is about 20% higher than the blocky copolymer and the polymer blend due to the compositional heterogeneities in the hydrogen-bonded polymer system.…”

Section: Resultsmentioning

confidence: 99%

Effect of Hydrolysis on the Strength of Hydrogen Bonds and T_g of Poly(vinylphenol-co-acetoxystyrene)

2003

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A series of poly(vinylphenol-co-acetoxystyrene) (PVPh-co-PAS) copolymers were prepared by partial hydrolyses of poly(acetoxystyrene) (PAS) in acidic and basic solutions. Higher glass transition temperature, higher fraction of hydrogen-bonded carbonyl group, and higher interassociation equilibrium constant were observed for copolymers with same composition prepared from the acidic hydrolysis than from the basic hydrolysis because the sequence distribution of the former is relatively more random than the latter. Infrared spectra provide positive evidence in terms of sequence distribution, glass transition temperature, and hydrogen-bonding strength in poly(vinylphenol-co-acetoxystyrene) by prepared these two hydrolysis methods.

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3D Printing of Magnetoresponsive Polymeric Materials with Tunable Mechanical and Magnetic Properties by Digital Light Processing

Lantean

Barrera

Pirri

et al. 2019

Adv Materials Technologies

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nanocomposites [12][13][14][15] -have been investigated for a broad variety of applications, from micro-and soft-robotics [10,[16][17][18] to biomedicine. [19][20][21][22][23][24] Among the different strategies, an accessible pathway to fabricate stimuli-responsive (4D) printed objects consists in magnetizing a soft-polymer by loading the polymeric matrix with magnetic fillers, such as particles of magnetite (Fe 3 O 4 ) or neodymium-iron-boron (NdFeB). [25][26][27][28][29][30][31] Direct ink writing (DIW) and fused filament fabrication (FFF) have been used to fabricate fast responding actuators, [32][33][34][35][36][37][38][39][40] inks containing high loads of magnetic fillers [41] and 2D planar structures that exploit folding and unfolding processes. [42] Additionally, 3D printed permanent magnets were developed. [43][44][45][46][47][48] However, both DIW and FFF present some drawbacks: first in terms of resolution; second in terms of the dispersion of the fillers, that may lead to nonhomogeneous magnetic response; and third in terms of temperature of processing, which could be not compatible with the fillers. [48,49] For the last one, the temperature can be decreased using some additives, however this approach may affect the mechanical performances of devices. [41] An alternative to DIW and FFF is digital light processing (DLP). This vat polymerization 3D printing technology involves the use of photosensitive (liquid) resins which are able to cure (i.e., to solidify) upon irradiation with a suitable light source. In DLP, a digital light projector (digital micromirror device) illuminates a photocurable resin with a 2D pixel pattern allowing the curing of single slices of the 3D object. [50][51][52] The aforementioned drawbacks associated to DIW and FFF can be overcome by the use of DLP. Indeed: (i) the printing resolution in DLP belongs to the pixel dimensions and it is generally higher than DIW and FFF, [53,54] (ii) in DLP the dispersion of the fillers is easier to control since liquid formulations are used; and (iii) the fabrication process generally occurs at room temperature. Nevertheless, two precautions must be taken into account: first, the increase of the content of nanoparticles may affect the photopolymerization process since they compete with the photoinitiator in absorbing the incident radiation; and second, the dispersion of the fillers must be stable for the whole printing procedure in order to print an object whose response is homogeneous to an external input. For the latter, macroscopic sedimentation, segregation, and spatial inhomogeneity must be avoided.Digital light processing is used for printing magnetoresponsive polymeric materials with tunable mechanical and magnetic properties. Mechanical properties are tailored, from stiff to soft, by combining urethane-acrylate resins with butyl acrylate as the reactive diluent. The magnetic response of the printed samples is tuned by changing the Fe 3 O 4 nanoparticle loading up to 6 wt%. Following this strategy, magnetoresponsive active components ar...

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Glass transition temperatures of butyl acrylate-methyl methacrylate copolymers

Cited by 46 publications

References 22 publications

Glass Transition Temperatures of Poly[(methyl methacrylate)-co-(butyl acrylate)]s Synthesized by Atom-Transfer Radical Polymerization

Glass Transition Temperatures of Poly[(methyl methacrylate)-co-(butyl acrylate)]s Synthesized by Atom-Transfer Radical Polymerization

Effect of Hydrolysis on the Strength of Hydrogen Bonds and T_g of Poly(vinylphenol-co-acetoxystyrene)

3D Printing of Magnetoresponsive Polymeric Materials with Tunable Mechanical and Magnetic Properties by Digital Light Processing

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Glass transition temperatures of butyl acrylate-methyl methacrylate copolymers

Cited by 46 publications

References 22 publications

Glass Transition Temperatures of Poly[(methyl methacrylate)-co-(butyl acrylate)]s Synthesized by Atom-Transfer Radical Polymerization

Glass Transition Temperatures of Poly[(methyl methacrylate)-co-(butyl acrylate)]s Synthesized by Atom-Transfer Radical Polymerization

Effect of Hydrolysis on the Strength of Hydrogen Bonds and Tg of Poly(vinylphenol-co-acetoxystyrene)

3D Printing of Magnetoresponsive Polymeric Materials with Tunable Mechanical and Magnetic Properties by Digital Light Processing

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Product

Resources

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Effect of Hydrolysis on the Strength of Hydrogen Bonds and T_g of Poly(vinylphenol-co-acetoxystyrene)