Positron annihilation lifetime spectroscopy for miscibility investigations of styrene–butadiene–styrene copolymer/polystyrene blends

Meng, Xiaoyu; Liu, Xu; Li, Zhuoxi; Zhou, Qiong

doi:10.1002/pen.23614

Cited by 6 publications

(4 citation statements)

References 25 publications

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“…Differences observed in two PAL measurements (for pure polymer, described in ref [11] and J-PET scintillator) are possible due to the doping of the polymer; even small impurity may significantly affect the organization of molecules and it can also shift the glass transition point (Tg). That supposition seems to be confirmed by the results of investigation done in polypropylene copolymers and blends [8], where additional structural transition is observed. The existence of additional structural transitions may also result from the formation of small crystalline regions in the amorphous structure.…”

Section: Resultssupporting

confidence: 57%

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PALS investigations of free volumes thermal expansion of J-PET plastic scintillator synthesized in polystyrene matrix

et al. 2015

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Abstract. The polystyrene doped with 2,5-diphenyloxazole as a primary fl uor and 2-(4-styrylphenyl)benzoxazole as a wavelength shifter prepared as a plastic scintillator was investigated using positronium probe in wide range of temperatures from 123 to 423 K. Three structural transitions at 260, 283, and 370 K were found in the material. In the o-Ps intensity dependence on temperature, the signifi cant hysteresis is observed. Heated to 370 K, the material exhibits the o-Ps intensity variations in time.

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Section: Resultssupporting

confidence: 57%

“…This substance was used for the first time for this purpose [17,18]. A pure polystyrene, because of the possible applications, was widely investigated using many techniques including PALS [8,11,12]. Previous papers indicate that ortho-positronium (o-Ps) intensity is unstable and depends on the thermal history of the sample.…”

Section: Introductionmentioning

confidence: 99%

PALS investigations of free volumes thermal expansion of J-PET plastic scintillator synthesized in polystyrene matrix

et al. 2015

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“…[11] SBS modifier swells by absorbing the light components in the base asphalt to form a network structure. [12,13] Currently, there is still no professional technology to remove SBS modifiers from modified asphalt, which can only indirectly reflect SBS content from its physical properties. [14] Therefore, developing a method for rapid detection of SBS content is critical.…”

Section: Introductionmentioning

confidence: 99%

Quantitative detection of polymer content in styrene‐butadiene‐styrene modified asphalt after aging

Que

Wang

et al. 2022

Polymer Engineering & Sci

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The identification of styrene-butadiene-styrene (SBS) content is crucial in engineering applications since the key to assessing the performance of agedmodified asphalt is the SBS content. Six types of modified asphalts with various SBS contents were prepared, and physical, rheological, and Fourier-transform infrared spectroscopy (FTIR) tests were conducted. The fitting relationship between aged-modified asphalt indexes and SBS content was established, and the three methods' accuracy, simplicity, and efficiency were compared and analyzed. The results showed that the fitting relationship between SBS content and viscosity could exceed 0.83 after aging. However, the linear and quadratic fittings deviated from the measured values, and the softening point had no apparent law with the SBS content. The rheological index method significantly correlated with SBS content and is highly automated. However, FTIR was established based on the direct detection of SBS characteristic peaks compared with the physical and rheological indexes methods. It could directly reflect the SBS content and was not easily disturbed by SBS substitutes. In addition, after long-term aging, the linear relationship between SBS characteristic peak index, A 966 /A 811 , and SBS content could exceed 0.97. The FTIR test exhibited high accuracy and fast detection speed and is the best detection method for SBS content.

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“…As one kind of the most commonly used binders, fluoropolymer has the advantages of good physical and chemical stability,e xcellent aging resistance and heat resistance, and great compatibility with other components in composite explosives [29][30][31].C ompared with general hydrocarbons, the high density of fluoropolymer brings on the enhancement of the density and performance for PBX. On the other hand, styrene copolymer is an engineering thermoplastic with high impact, high transparency and rigidity,g ood heat stability,a nd mechanical properties, and it is widely applied in automobile, electrical equipments, mechanical parts, as well as packing containers [32,33].T he blending of fluoropolymer and styrene copolymer provides an effective way to make full use of their respective advantages.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Creep Properties of TATB‐Based Polymer‐Bonded Explosive Using Styrene Copolymer

Lin

Liu

Huang

et al. 2014

Propellants Explo Pyrotec

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[a] 1I ntroductionThe creep, which is at ime-dependent plastic deformation, takes place at certain temperature and loading stress [1][2][3]. In recent years, the creep behavior of polymers is of great interest in the academy and industry because of its significant influences on the dimensional stability,l ong-term durability,a nd reliability.C onsequently,i mproving the creep resistance of polymer has attracted interest in science and engineering. Ac ommon and convenient method is the addition of inorganic nanoparticles [4][5][6].I ti sr ecognized that with the addition of al ow content of inorganic nanoparticles, the creep resistance of polymer could be significantly improved. However,i ti sa lso reported that the addition of nanoparticles, such as clay,r educed the creep resistance of polymer due to the decrease of crystal size and degree of crystallinity [7,8].B esides, it has been demonstrated that the existence of intertube sliding or stick-slip [9] may give rise to an increase in creep rate under low stress [10].O n the other hand, polymer blending has been proved to be an economical, rapid, and versatile method to obtain desirable creep properties in the industrial field [11,12].I ti so bserved that blending low-creep-speed PS with high-creepspeed PE appears to improve the creep performance of the final composite with reduced creep speed [13].It is now well accepted that as an insensitive high explosive (IHE) with the advantages of moderately energy output and excellent thermally stability,1 ,3,5-triamino-2,4,6-trinitrobenzene (TATB) is extensivelyapplied in military field [14][15][16].T he polymer-bonded explosives (PBXs) based on TATB, such as LX-17 (92.5 %T ATBa nd 7.5 %k el-F800 by weight) and PBX-9502 (95 %T ATBa nd 5% kel-F800 by weight) have been developed in the last decades [17][18][19]. The creep relaxation behavior of PBX is ac omplicated process, which is affected by many factors, for instance, the type of explosive, the percentage and type of binder,t he stress level and test temperature [20,21].H igh fidelity measurements of time-dependent creep strain in the plastic-bonded explosives LX-17 and PBX-9502 were carried out and it has been revealed that the creep and recovery behavior of PBX is dependent on the percentage of binder, the stress level and test temperature [22].H owever,r esearches on the effects of the type of binder on the creep performance of TATB-based PBX are relatively limited.PBXs are typically bi-phase composite materials consisting of am ixture of explosive crystals and ap olymeric binder.G enerally,t he explosive component comprises 80-95 %o ft he mass of the composite. Although the ratio of the polymer binder component is limited to al ow value, the component and proportion of polymer binder have am arked influence on the properties of PBX, such as thermal decomposition behavior,m echanical properties, failure form, aging resistance, and sensitivity [23][24][25][26][27][28].As one kind of the most commonly used binders, fluoropolymer has the advantages of good physical an...

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Positron annihilation lifetime spectroscopy for miscibility investigations of styrene–butadiene–styrene copolymer/polystyrene blends

Cited by 6 publications

References 25 publications

PALS investigations of free volumes thermal expansion of J-PET plastic scintillator synthesized in polystyrene matrix

PALS investigations of free volumes thermal expansion of J-PET plastic scintillator synthesized in polystyrene matrix

Quantitative detection of polymer content in styrene‐butadiene‐styrene modified asphalt after aging

Enhancement of Creep Properties of TATB‐Based Polymer‐Bonded Explosive Using Styrene Copolymer

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