how does increase in glass transition in polymers shows good dispersion of nanoparticles
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If the nanoparticles are dispersed and small, they can interfere with the radius of gyration of a polymer chain, increase the free volume, thus acting like a plasticizer. However this type of dispersion is rare. Other reasons for a Tg decrease however could be that some impurity (Fe or Ti) in the filler is decreasing the molecular weight of the polymer during processing. Another reason is that you are working with a crosslinked system and the nanoparticles..
This may be as result of NPs agglomeration. Agglomerated nanoparticles decrease the polymeric network strength that can lead to decrease in Tg, as well as tensile characterizations. If you are using surfactant, you may need to increase the intensity of sonication or choose/change your surfactant. If not, you'd better do. hope it helped.
This may be as result of NPs agglomeration. Agglomerated nanoparticles decrease the polymeric network strength that can lead to decrease in Tg, as well as tensile characterizations. If you are using surfactant, you may need to increase the intensity of sonication or choose/change your surfactant. If not, you'd better do. hope it helped.
Also, in the case the crystallinity of your network increases by addition of NPs, it probably results in decreasing Tg
If the nanoparticles are dispersed and small, they can interfere with the radius of gyration of a polymer chain, increase the free volume, thus acting like a plasticizer. However this type of dispersion is rare. Other reasons for a Tg decrease however could be that some impurity (Fe or Ti) in the filler is decreasing the molecular weight of the polymer during processing. Another reason is that you are working with a crosslinked system and the nanoparticles..
This may be as result of NPs agglomeration. Agglomerated nanoparticles decrease the polymeric network strength that can lead to decrease in Tg, as well as tensile characterizations. If you are using surfactant, you may need to increase the intensity of sonication or choose/change your surfactant. If not, you'd better do. hope it helped.
This may be as result of NPs agglomeration. Agglomerated nanoparticles decrease the polymeric network strength that can lead to decrease in Tg, as well as tensile characterizations. If you are using surfactant, you may need to increase the intensity of sonication or choose/change your surfactant. If not, you'd better do. hope it helped.
Also, in the case the crystallinity of your network increases by addition of NPs, it probably results in decreasing Tg
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