Non-isothermal fusion bonding of polypropylene

The fusion bonding of neat polypropylene (PP) has been investigated under non-isothermal conditions with different initial adherend temperatures, and the results compared with results from bonds prepared under isothermal conditions with identical adherend temperatures. The mode I critical strain energy release rate of the bonds, Gc, was measured using a double cantilever beam geometry with a constant crack opening displacement. The effect of the adherend temperature and the hold time are summarized in time-temperature and fracture energy-temperature maps, a methodology that is easily applicable to other systems. Of immediate practical interest is the observation that for estimated interface temperatures just above the melting point, non-isothermal bonding gave bonds with Gc approaching that of the bulk resin after much shorter times than isothermal bonding.


Published in:
Polymer, 42, 14, 6247-6257
Year:
2001
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 Record created 2006-06-26, last modified 2018-03-17

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