Microstructure of syndiotatic polystyrene observed by transmission electron microscopy
碩士 === 國立成功大學 === 化學工程學系碩博士班 === 91 === Crystalline syndiotactic polystyrene(sPS) was blended with amorphous atacticpolystyrene(aPS)[Mw=1300g/mol].Polarizedoptical microscopy (POM ) has been used to study the spherulitic growth of sPS/aPS blends at 250oC.WAXD has been used to determine the crystal...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2003
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| Online Access: | http://ndltd.ncl.edu.tw/handle/35857871917222760064 |
| Summary: | 碩士 === 國立成功大學 === 化學工程學系碩博士班 === 91 === Crystalline syndiotactic polystyrene(sPS) was blended with amorphous atacticpolystyrene(aPS)[Mw=1300g/mol].Polarizedoptical microscopy (POM
) has been used to study the spherulitic growth of sPS/aPS blends at 250oC.WAXD has been used to determine the crystal form of the sPS/aPS(L) blends.We use SEM and TEM to observe the microstructure of sPS/aPS(L) blends.
Cold crystallization means crystallization of polymers from a quenched glassy state.Morphology in cold-crystallized sPS has been less studied.The crystallized samples were analyzed by wide-angle x-ray diffraction. We try to observe the microstructure of lamellae in cold-crystallied sPS using TEM.
sPS may possess various unit cell forms depending on the thermal history and/or solution treatment.The delta、delta e、gamma and beta froms are prepared by the solution-cast method and annealed at different temperatures.We try to observe the microstructure of sPS with delta、delta e、gamma and beta froms.
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