Predicting the influence of edge oxidation in parallel-plate rheometry


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{
  "metadata": {
    "is_last": true, 
    "publication_date": "Jan 18, 2022, 18:44:02", 
    "edited_by": 576, 
    "version": 1, 
    "license": "Creative Commons Attribution 4.0 International", 
    "license_addendum": null, 
    "_files": [
      {
        "checksum": "md5:7825c796f6cc696d161b7f52a9ecb9b1", 
        "key": "Model_Torque_In_EdgeOxidation.m", 
        "size": 3482, 
        "description": "MATLAB code for predicting the viscoelastic properties of the bulk and the gel in an edge oxidized parallel-plate system."
      }, 
      {
        "checksum": "md5:26113a09796aa69629dd622287fbeb44", 
        "key": "TPA_270C_Dry_Air_10rad.csv", 
        "size": 60977, 
        "description": "Time dependent experimental data for viscoelastic properties obtained from parallel plate rheometer. The file format is \".csv\" which is read by the MATLAB \".m\" file."
      }
    ], 
    "mcid": "2022.8", 
    "keywords": [
      "Experimental", 
      "MATLAB", 
      "Edge Oxidation"
    ], 
    "contributors": [
      {
        "givennames": "Varun", 
        "email": "Varun_Venoor@uml.edu", 
        "familyname": "Venoor", 
        "affiliations": [
          "University of Massachusetts Lowell, Department of Plastic Engineering, Lowell, Massachusetts, USA"
        ]
      }, 
      {
        "givennames": "Jo Ann", 
        "familyname": "Ratto", 
        "affiliations": [
          "The Combat Capabilities Development Command Soldier Center, Natick, Massachusetts, USA"
        ]
      }, 
      {
        "givennames": "David", 
        "familyname": "Kazmer", 
        "affiliations": [
          "University of Massachusetts Lowell, Department of Plastic Engineering, Lowell, Massachusetts, USA"
        ]
      }, 
      {
        "givennames": "Margaret", 
        "familyname": "Sobkowicz", 
        "affiliations": [
          "University of Massachusetts Lowell, Department of Plastic Engineering, Lowell, Massachusetts, USA"
        ]
      }
    ], 
    "status": "published", 
    "doi": "10.24435/materialscloud:cb-xf", 
    "title": "Predicting the influence of edge oxidation in parallel-plate rheometry", 
    "id": "1217", 
    "description": "Melt post-condensation, thermal, and thermo-oxidative degradation of a cyclo-aliphatic polyamide were studied through time-resolved rheometry (TRR). The implemented TRR elucidates structural changes occurring during two concurrent phenomena, namely melt post-condensation and thermal/thermo-oxidative degradation, during the time sweep in a parallel plate rheometer. TRR measurements were conducted on neat polyamide under nitrogen (inert/non-oxidative) and air (oxidative) environment at 3 % strain amplitude and a range of frequencies between 0.1 and 100 rad/sec for two hours. At temperatures of 260, 270, and 275 \u00b0C, a dual-stage time-dependent growth in viscoelastic properties was observed under an oxidative environment. Thermo-oxidative degradation of polyamide melt 270 \u00b0C was shown to occur from the exposed sample edge, continuing inwards, effectively reducing the radius of the unoxidized polymer melt by 6.4 %. A modeling approach using MATLAB is presented to interpret and differentiate the rheological behavior of edge oxidized gel and bulk polymer within the volume of the sample melt. The code removes the effects of the strain limiter and the edge gelation from experimental measurements in predicting the material properties.", 
    "owner": 533, 
    "_oai": {
      "id": "oai:materialscloud.org:1217"
    }, 
    "conceptrecid": "1216", 
    "references": [
      {
        "comment": "The code and sample data presented in this archive is in reference to the article to be published in Rheologica Acta with the title \"Analysis of post-condensation and thermo-oxidative degradation in cyclo-aliphatic polyamide through time-resolved rheology (TRR)\".", 
        "citation": "Venoor, V., Ratto, J.A, Kazmer, D.O., & Sobkowicz, M.J., Analysis of post-condensation and thermo-oxidative degradation in cyclo-aliphatic polyamide through time-resolved rheology (TRR). Rheol Acta (2022). \"(Accepted)\".", 
        "type": "Journal reference"
      }
    ]
  }, 
  "updated": "2022-01-18T17:44:02.113644+00:00", 
  "revision": 10, 
  "id": "1217", 
  "created": "2022-01-17T19:31:32.241773+00:00"
}