Local dynamics of poly(dimethyl siloxane) in the presence of reinforcing filler particles

Arrighi, Valeria; Higgins, J. S.; Burgess, A. N.; Floudas, George

doi:10.1016/s0032-3861(98)00139-6

Cited by 85 publications

(79 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, DSC would seem to be an unambiguous indicator of a glassy polymer domain in the presence of filler. Results are summarized in Table V. Arrighi et al 69 found no change in the DSC T g of PDMS with either 7 or 20 nm diameter silica particles. The DSC transition was broadened in the filled rubber, but interpretation of the broadening was obfuscated by the presence of crystallinity in the polymer.…”

Section: Nuclear Magnetic Resonancementioning

confidence: 90%

“…Thus, the authors concluded that chains bound to the carbon black particles had greater mobility than the neat polymer. 81 69 determined the incoherent dynamic structure factor from the elastic scattering intensity for PDMS, neat and mixed with silica particles (as small as 7 nm diameter). Deviation from a linear response of the normalized intensity (the Debye-Waller factor) in a semilogarithmic plot versus temperature reflects molecular motions other than vibrations; thus, a decrease at T g signals the onset of local segmental motion.…”

Section: Neutron Scatteringmentioning

confidence: 99%

“…Note that these same samples showed no change in calorimetric T g due to the filler. 69 This group subsequently carried out a neutron scattering study of both PDMS and PVAc containing the silica particles. 82 They fitted the quasielastic scattering to a sum of a KWW function (Equation (1) with β ≤ 1) to represent the polymer chains and a constant term to represent the (presumed) immobilized fraction.…”

Section: Neutron Scatteringmentioning

confidence: 99%

See 2 more Smart Citations

Glass Transition and Interfacial Segmental Dynamics in Polymer-Particle Composites

Robertson

Roland

2008

Rubber Chemistry and Technology

150

125

View full text Add to dashboard Cite

We review the literature concerned with the effect of proximity to a filler surface on the local segmental mobility of polymer chains. This mobility is commonly assessed from either the glass transition temperature, Tg, or the segmental relaxation times measured by mechanical, dielectric, or NMR spectroscopy. Published studies report increases, decreases, or no change in Tg upon the addition of carbon black, silica, and other reinforcing fillers. Similarly, the segmental relaxation times have been found to increase or be invariant to the presence of nanometer-sized particles. Some of these discrepancies can be ascribed to ambiguous methods of data analysis; others likely reflect the variation in filler-polymer interaction among different systems. There are unequivocal examples of polymers that have segmental dynamics and glass transitions unaffected by nano-particle reinforcement. However, the general principles governing the behavior remain to be clarified, with further work, focusing on the micromechanics at the particle interface, required for resolution of this important aspect of rubber science and technology.

show abstract

Section: Nuclear Magnetic Resonancementioning

confidence: 90%

Section: Neutron Scatteringmentioning

confidence: 99%

Section: Neutron Scatteringmentioning

confidence: 99%

See 1 more Smart Citation

Glass Transition and Interfacial Segmental Dynamics in Polymer-Particle Composites

Robertson

Roland

2008

Rubber Chemistry and Technology

150

125

View full text Add to dashboard Cite

show abstract

“…This parameter can be evaluated either by measuring the segmental relaxation time or the T g behavior before and after filler addition [20]. The relaxation time was mainly measured using dielectric spectroscopy [183,184], NMR spectroscopy [185][186][187][188][189][190][191][192], and neutron scattering [193,194]. T g was determined using dynamic mechanical spectroscopy [195][196][197][198][199], calorimetry [191,[200][201][202], and dilatometry [184,203] techniques.…”

Section: Glass Transition (T G )mentioning

confidence: 99%

A review on the role of interface in mechanical, thermal, and electrical properties of polymer composites

Kashfipour

Mehra

Zhu

2018

Adv Compos Hybrid Mater

157

View full text Add to dashboard Cite

Composite materials and especially polymer composites are widely used in daily life and different industries due to their vastly different properties and design flexibility. It is known that the properties of the composites are strongly related to the properties of its constituents. However, it has been reported in many studies, experimentally and by simulations, that the characteristics of the composites do not follow the rule of mixing. It means that in addition to properties of the constituents, there are other parameters affecting the final physicochemical properties of composites. The interfacial interactions between fillers and host is one of the factors which can strongly affect the properties of the composite. In this review, we summarized the type of interactions between the constituents, their improvement techniques, interaction measurement methods, and the effects of interfacial interactions on thermal, mechanical, and electrical properties of composites.

show abstract

“…Most frequently silicone rubbers are filled with amorphous silica [10,11]. A considerable reduction in the flammability of silicone rubbers can be obtained by combining them with cenospheric filler.…”

Section: Introductionmentioning

confidence: 99%

Effect of cenospheric fillers on the flammability and fire hazard of silicone rubber composites

Rybiński

Żukowski

Bradło

2016

J Therm Anal Calorim

View full text Add to dashboard Cite

This paper presents the results of testing the flammability of silicone rubber composites containing fillers, such as cenospheres, cenospheres covered with iron, attapulgite, wollastonite, aluminum hydroxide and silica. In order to increase the insulating character of boundary layer, boron trioxide was incorporated into the composites of silicone rubber as a ceramization additive. The flammability of the composites was tested with the use of a cone calorimeter. The composition of the gaseous products of thermal decomposition was determined quantitatively and qualitatively in the system with intensive stirring in the fluidal bed, under isothermal conditions at temperatures T = 550, 650 and 750°C. All the test results show that the fillers used, especially with ceramization additives considerably reduce the fire hazard of silicone rubber composites containing these fillers.

show abstract

Local dynamics of poly(dimethyl siloxane) in the presence of reinforcing filler particles

Cited by 85 publications

References 19 publications

Glass Transition and Interfacial Segmental Dynamics in Polymer-Particle Composites

Glass Transition and Interfacial Segmental Dynamics in Polymer-Particle Composites

A review on the role of interface in mechanical, thermal, and electrical properties of polymer composites

Effect of cenospheric fillers on the flammability and fire hazard of silicone rubber composites

Contact Info

Product

Resources

About