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 Abstracts 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
ether-based 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
DOCUMENT DELIVERY SERVICE
Almost all of the documents which are listed in the References and Abstracts section are available in full text form,
as photocopies or pdf files from Rapra Technology Ltd’s Document Delivery Service. Documents can be delivered
by a variety of methods, including email, post or fax. Customers may pay for individual copies at the time of
ordering by credit card or alternatively open up a deposit account.
Please contact the Document Delivery Department for availability, current prices and delivery methods.
Document Delivery Department
Rapra Technology Limited, Shawbury, Shrewsbury, Shropshire SY4 4NR, United Kingdom
Telephone: +44 (0)1939 250383 Fax: +44 (0)1939 251118 Email:
[email protected]
Location
Companies or organisations mentioned
Abstract
Authors and affiliation
Source of original article
Title