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Experimental and theoretical investigations of the high performance blends of PEEK/PEI

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Published/Copyright: October 14, 2017
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Journal of Polymer Engineering
From the journal Journal of Polymer Engineering Volume 38 Issue 4

Abstract

Polyether ether ketone (PEEK) and polyether imide (PEI) blends were made by melt blending using a twin-screw extruder. The blends were characterized by mechanical testing, thermal, rheological and morphological studies. Predictive models were used to explain the tensile modulus and strength properties. The impact strength increases when percentage of the PEI increases in composite. This has been analyzed on the basis of the interphase adhesion. Tensile and flexural strength also increased with increase in the PEI content. Incorporation of PEI increases the glass transition temperature (Tg) and facilitates its processing. Scanning electron microscopy (SEM) was employed to study the phase structure. These experimental findings are in agreement with predictive models based on the rule of mixture and the Nicolais-Narkis model. Multi quadric radial basis function (MQRBF) was applied to study the static and dynamic response of the PEEK/PEI blend plate at uniformly distributed load. The present results were compared with numerical and analytical results.

Keywords: differential scanning calorimetry; phase morphology; polyether ether ketone; polyether imide; tensile strength; thermo gravimetric analysis

Appendix A: Multiple regression analysis

A⋅a=p  where

A=(l*k) coefficient matrix

a=(k*1) vector

p=(l*1) load vector

Approximating the solution by introducing the error vector e, we get

p=Aa+e  where

e=(l*1) vector

To minimize the error norm, let us define a function S as

S(a)=eTe=(p−Aa)T(p−Aa)

The least-square norm must satisfy

(∂S/∂a)a=−2ATp+2ATAa=0

This can be expressed as

a=(ATA)−1ATP  or

a=B · P

The matrix B is evaluated once and stored for subsequent usages.

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Received: 2017-1-27
Accepted: 2017-8-5
Published Online: 2017-10-14
Published in Print: 2018-4-25

©2018 Walter de Gruyter GmbH, Berlin/Boston

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  2. Material properties
  3. Persistent inhibition performance of amine polymers to inhibit clay swelling
  4. Evaluation of stearic acid modified industrial lime sludge waste as a filler in high density polyethylene composites
  5. Effects of graphene surface energy on the structure and mechanical properties of phenolic foams
  6. Experimental and theoretical investigations of the high performance blends of PEEK/PEI
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https://doi.org/10.1515/polyeng-2017-0002
Keywords for this article
differential scanning calorimetry; phase morphology; polyether ether ketone; polyether imide; tensile strength; thermo gravimetric analysis

Articles in the same Issue

  1. Frontmatter
  2. Material properties
  3. Persistent inhibition performance of amine polymers to inhibit clay swelling
  4. Evaluation of stearic acid modified industrial lime sludge waste as a filler in high density polyethylene composites
  5. Effects of graphene surface energy on the structure and mechanical properties of phenolic foams
  6. Experimental and theoretical investigations of the high performance blends of PEEK/PEI
  7. Reciprocating friction and wear of polyimide composites filled with solid lubricants
  8. Dual pH-/temperature-responsive and fluorescent hydrogel for controlled drug delivery
  9. Thermoelectric behavior of PEDOT:PSS/CNT/graphene composites
  10. Investigating the properties of maleated poly(lactic acid) and its effect on poly(lactic acid)/cellulose nanofiber composites
  11. Preparation of graphene and its application in polycarbonate/acrylonitrile-butadiene-styrene composites
  12. Preparation and assembly
  13. Electrospinning of poly(lactic acid)/polycaprolactone blends: investigation of the governing parameters and biocompatibility
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