高分子接枝反應之表面改質、強化高分子界面之定量接著分析
Date Issued
2004
Date
2004
Author(s)
DOI
922216E002015
Abstract
Nitrogen plasma caused ion implantation and surface modification on polyethylene
terephthalate (PET) efficiently. With the increasing of plasma treatment time, water contact angle
of treated-PET surface decreased, finally reached a stable value of 25degree. By X-ray
photoelectron spectrometer (XPS) analysis, atomic nitrogen content of plasma treated PET by ion
implantation and bonding condition can be obtained. Furthermore, the interfacial fracture
toughness (Gc) between poly styrene–co-maleic anhydride (PSMA) and plasma treated-PET was
investigated. Amine groups formed by plasma modification on the PET surface can reacts with
styrene maleic anhydride (SMA) in bulk PSMA, forming imide covalent bonds to enhance
interfacial fracture toughness between PET/PSMA. When annealed at 150 , the PET/PSMA is ℃
too strong to cause crack-tip propagated into PET side such that Gc values could be enhanced
over 100J/m 2 for long plasma treatment time. Otherwise, the diffusion rate of PSMA is too fast at
annealing temperature at 160 , causing a new weak interface occurred, and then crack ℃-tip would
propagate into PSMA side, Gc value become lower than condition 150 ℃. Fracture mechanisms
are verified by XPS and SEM analysis of fractured PET and PSMA surface, and the results
coincide with our explanation. In our case, there are two mechanisms of PET/PSMA interface
fracture. When areal chain density (Σ ) on the interface is lower than 0.05/nm 2 , the interfacial
fracture toughness (Gc) is proportional to Σ 2 . And at areal chain density larger than 0.05/nm 2
region, the interfacial fracture toughness is independent to areal chain density, because the
fracture happened in PET side.
Publisher
臺北市：國立臺灣大學化學工程學系暨研究所
Type
report
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