• português (Brasil)
    • English
    • español
  • English 
    • português (Brasil)
    • English
    • español
  • Login
About
  • Politics
  • Instructions to authors
  • Contact
    • Politics
    • Instructions to authors
    • Contact
View Item 
  •   Home
  • Centro de Ciências Exatas e de Tecnologia (CCET)
  • Programas de Pós-Graduação
  • Ciência e Engenharia de Materiais (PPGCEM)
  • Teses e dissertações
  • View Item
  •   Home
  • Centro de Ciências Exatas e de Tecnologia (CCET)
  • Programas de Pós-Graduação
  • Ciência e Engenharia de Materiais (PPGCEM)
  • Teses e dissertações
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Browse

All of DSpaceCommunities & CollectionsBy Issue DateAuthorsAdvisorTitlesSubjectsCNPq SubjectsGraduate ProgramDocument TypeThis CollectionBy Issue DateAuthorsAdvisorTitlesSubjectsCNPq SubjectsGraduate ProgramDocument Type

My Account

Login

Análise da influência das condições de mistura por extrusão sobre o comportamento de blendas poliméricas PBT/ABS

Thumbnail
View/Open
4729.pdf (10.37Mb)
Date
2011-06-09
Author
Prezenszky, André Cortegoso
http://lattes.cnpq.br/8881087453572394
Metadata
Show full item record
Abstract
At the present work several properties of PBT/ABS blends processed with different extrusion conditions as feed rate, screw speed and profile and die geometry were studied in order to verify how these parameters affect their properties. The specimens were obtained directly from the extruded blends to keep extrusion characteristics on the results. The main reason to add ABS to the PBT was to have tough PBT/ABS blends. It was verified that even without a compatibilizer, impact strength of the blends was higher than the impact strength of neat components. In addition, the ductile brittle temperature transition (DBTT) has decreased almost 60ºC when compared to the neat PBT. It was also verified that differences on processing parameters affect mostly DBTT, exhibiting values in the range of -5ºC to 40ºC. The best results were obtained using higher feed rates, low screw speed rotation, kneading blocks lagged 90º and shorter dies. It was also developed a degradation evaluation method and showed that the thermal mechanical degradation of the blend components can be verified by analyzing the consumption of the double bonds of the polybutadiene rich phase from ABS and the reduction of molecular weight of PBT. Although adequate results were obtained on preliminary degradation analyses of the components mixed in a torque rheometer, the method was insufficiently sensitive to identify significant differences on the degradation of blend components processed in a twin screw extruder.
URI
https://repositorio.ufscar.br/handle/ufscar/885
Collections
  • Teses e dissertações

UFSCar
Universidade Federal de São Carlos - UFSCar
Send Feedback

UFSCar

IBICT
 

 


UFSCar
Universidade Federal de São Carlos - UFSCar
Send Feedback

UFSCar

IBICT