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chemicals and then made some minor chemical changes.This
gave their new polymer the chemical features that they wanted.
They coated a thin,tape-like piece of plastic with the new
glue.Then they conducted "peel tests".They measured the
force needed to peel off the tape after it had been pressed down
flat.The researchers compared this test tape to types that you
can buy today in the store.And their new tape performed well.
"If this new adhesive were someday used for store-bought
tapes,it could help the environment in many ways.Lignin is a
waste from making paper.So this glue wouldn't just replace ad-
hesives made from crude oil(原油),”said Zhuohua Sun,a chem
ist at the University of Groningen."It would also prevent lignin
from going in the trash.
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