| 摘要 |
The present invention relates to poly(ethylene terephthalate) ("PET") polymer resins having high melt strength and advantageous nonNewtonian behavior; the resins can be foamed to produce closed cell structures with advantageous densities, cell sizes, cell size distributions, mechanical properties and thermal properties. More specifically, the PET resins of the present invention are highly branched due to the inclusion of one or more branching agents, and these resins can be advantageously used with environmently friendly blowing agents.
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