Comprehensive modelling of the experimental temperature and stress response of time-dependent materials

  1. Home
  2. Research
  3. Publications

abstract

The stress- and temperature-dependent non-linear creep behaviour of polymers and other materials is quantitatively modelled as a superposition of a wide range of activated motions at the molecular scale, covering wide but well-defined space and time scales. The resulting time, temperature and stress dependences are coupled (not fully separable) except at low stress values, where linear viscoelastic behaviour is directly obtained, improving on previous (approximate or questionable) time-temperature and time-stress superposition or equivalence relationships. The behaviour has been shown to have a strong cooperative nature, which may be interpreted in terms of varying clusters of identifiable structural elements within the material. Reasonably good descriptions of the experimental creep behaviour of both amorphous and semicrystalline polymers have already been achieved, but this work concentrates on the behaviour of an amorphous polycarbonate (PC), including the physical characterization and modelling of its retardation time spectrum.

keywords

CREEP-BEHAVIOR; POLYPROPYLENE; COMPOSITES; TENSILE

subject category

Polymer Science

authors

Andre, JRS; Pinto, JJC

Groups

Share this project:

Related Publications

Publication Details

type
Journal Article
year
2007
journal
MACROMOLECULAR SYMPOSIA
volume
247
publisher
WILEY-V C H VERLAG GMBH
issn
1022-1360
digital object identifier
10.1002/masy.200750103
web of science article identifier
WOS:000245288600004

Citations

Social Interaction

We use cookies for marketing activities and to offer you a better experience. By clicking “Accept Cookies” you agree with our cookie policy. Read about how we use cookies by clicking "Privacy and Cookie Policy".


Privacy and Cookie Policy

Personal data

CICECO-Aveiro Institute of Materials respects your privacy, ensuring confidentiality of personal data you share with the institution through this way, not collecting any personal information about you without your consent, under the terms required by General Data Protection Regulations (RGPD).

The data collected in forms are intended exclusively for processing user requests and will not be used for any other purpose, always safeguarding their confidentiality, under the terms of the protection conferred by the aforementioned regulation.

The collection and processing of data is the responsibility of CICECO and its storage is properly protected, only authorized CICECO employees can access the information within the scope of their functions, always being clear in the respective collection forms the purposes for which they are intended. The remaining issues to be considered in this matter will be handled by the University of Aveiro in accordance with the regime established by the GDPR.

Cookies policy

Cookies are small files with alphanumeric information that are stored on your computer's hard drive by your browser and are intended to improve the user experience and enhance website navigation.

Collection and use of technical information

The cookies used on CICECO are anonymous, and no information about our users that allows their personal identification is stored in them.

The technical information recorded consists of:

  • iP (Internet Protocol) address of the visitor;
  • the type of internet browser used by the website visitor and the respective operating system used;
  • the date and time of the consultation;
  • the pages visited on the site and the documents downloaded
  • The technical information collected is used for statistical purposes only.

Cookies used

Session cookies

These cookies are used to record user preferences, such as the language in which websites are displayed or to maintain authenticated user sessions, and are automatically deleted when the browser is closed.

Persistent cookies

These cookies store information that is needed between sessions. For example, a persistent cookie is set to record that you have been made aware of the cookie policy so that the message regarding this policy is not shown again the next time you visit the website. This cookie remains on the computer until it reaches its expiry date or is deleted by the user.

Data protection

The present privacy policy covers the Information System of the University of Aveiro (SIUA), governed by the General Data Protection Regulations (RGPD) Regulation (EU) No. 2016/679, of April 27th, 2016.

Data Protection Officer

The University of Aveiro has a Data Protection Officer (DPO), who ensures compliance of the processing of personal data with the legislation in force, and is available through the following email address epd@ua.pt.

Close