| 摘要 |
The invention relates to a method for grafting a compound by irradiation, that can be grafted onto a fluorinated polymer, preventing the destabilisation of the fluorinated polymer. Said method comprises the following steps: a) the fluorinated polymer is mixed in the melted state thereof with a graftable compound; b) the mixture obtained in a) is converted into films, plates, granulates or powder; c) the products from step b) are subjected to photonic (gamma) or electronic (beta) irradiation, in a dose of between 0.5 and 15 Mrad; and d) optionally the products from step c) are washed and/or degassed. According to said method, a stabilising agent is added to the fluorinated polymer. Said stabilising agent can be an antioxidant, a graftable metallic salt, or a combination of the two. The invention also relates to structures comprising at least one layer of said mixtures and at least one layer of another material, and to the use of said structures to obtain a barrier effect. Said structures act as a barrier to a plurality of fluids, especially to petrol and air conditioning fluids, and can take the form of bottles, tanks, containers, pipes and all kinds of recipients. They can also be transformed into films used to produce packagings. ® KIPO & WIPO 2007
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