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[资源] Polyvinyl Alcohol: Materials, Processing and Applications

RAPRA REVIEW REPORTS
A Rapra Review Report comprises three sections, as follows:
1. A commissioned expert review, discussing a key topic of current interest, and referring to the References and
Abstracts section. Reference numbers in brackets refer to item numbers from the References and Abstracts
section. Where it has been necessary for completeness to cite sources outside the scope of the Rapra Abstracts
database, these are listed at the end of the review, and cited in the text as a.1, a.2, etc.
2. A comprehensive References and Abstracts section, resulting from a search of the Rapra Polymer Library
database. The format of the abstracts is outlined in the sample record below.
3. An index to the References and Abstracts section, derived from the indexing terms which are added to the abstracts
records on the database to aid retrieval.
Item 1
Macromolecules
33, No.6, 21st March 2000, p.2171-83
EFFECT OF THERMAL HISTORY ON THE RHEOLOGICAL
BEHAVIOR OF THERMOPLASTIC POLYURETHANES
Pil Joong Yoon; Chang Dae Han
Akron,University
The effect of thermal history on the rheological behaviour of ester- and etherbased
commercial thermoplastic PUs (Estane 5701, 5707 and 5714 from
B.F.Goodrich) was investigated. It was found that the injection moulding
temp. used for specimen preparation had a marked effect on the variations
of dynamic storage and loss moduli of specimens with time observed
during isothermal annealing. Analysis of FTIR spectra indicated that
variations in hydrogen bonding with time during isothermal annealing very
much resembled variations of dynamic storage modulus with time during
isothermal annealing. Isochronal dynamic temp. sweep experiments indicated
that the thermoplastic PUs exhibited a hysteresis effect in the heating and
cooling processes. It was concluded that the microphase separation transition
or order-disorder transition in thermoplastic PUs could not be determined
from the isochronal dynamic temp. sweep experiment. The plots of log
dynamic storage modulus versus log loss modulus varied with temp. over
the entire range of temps. (110-190C) investigated. 57 refs.
GOODRICH B.F.
USA
Accession no.771897
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附件 1 : Goodship,_Vannessa-Polyvinyl_Alcohol___Materials,_Processing_and_Application-iSmithers_Rapra_Publishing_(2010-02-24).pdf

2015-09-30 09:59:05, 1010.26 K