{"id":2934,"date":"2026-06-28T08:42:02","date_gmt":"2026-06-28T08:42:02","guid":{"rendered":"https:\/\/rms-labgroup.com\/?page_id=2934"},"modified":"2026-07-19T05:57:59","modified_gmt":"2026-07-19T05:57:59","slug":"heat-cycling-and-conditioning","status":"publish","type":"page","link":"https:\/\/rms-labgroup.com\/tr\/laboratories\/polymer-testing-laboratory\/heat-cycling-and-conditioning\/","title":{"rendered":"Heat Cycling and conditioning"},"content":{"rendered":"
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Operating Fluorescent Ultraviolet (UV) Lamp Apparatus for Exposure of Materials
<\/b><\/p>

Purpose: Assessment of materials\u2019 resistance (plastics, rubbers, coatings, and paints) to UV-induced aging and degradation under simulated weathering conditions.<\/p>

Standard: ASTM G154<\/p>

\u00a0Measured Properties<\/p>

  • Color Change (\u0394E):
    Measurement of sample color variation using a spectrophotometer or visual method.
    Units: \u0394E (CIE Lab)<\/li>
  • Gloss \/ Surface Appearance:
    Decrease or increase in the surface gloss of the sample.
    Units: GU (Gloss Units)<\/li>
  • Cracking \/ Surface Degradation:
    Observation and recording of the extent of surface cracking, flaking, or fragmentation.<\/li>
  • Mechanical Property Degradation:
    Reduction in tensile strength, elastic modulus, flexibility, or hardness.<\/li>
  • Weight Loss \/ Mass Change:
    Decrease in sample mass due to surface decomposition or volatilization of materials.
    Units: g or %<\/li>
  • Depth of Degradation \/ Surface Roughness:
    Measurement of the thickness of the damaged layer or changes in surface roughness.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
    \n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"\"\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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    Plastics – Determination of water absorption
    <\/b><\/p>

    Purpose: Determination of water absorption in plastics to assess dimensional stability, material uniformity, and potential changes in mechanical and physical properties<\/p>

    Standards for non-cellular plastics<\/p>

    ASTM D570, ISO 62, ASTM C272<\/p>

    Measured Properties<\/p>

    • Water Absorption (%)<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
      \n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"\"\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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      Rubber – Deterioration in an Air Oven<\/b><\/p>

      \u00a0<\/b><\/p>

      Purpose: A method for determining the effect of elevated temperature on the physical properties of vulcanized rubber.<\/p>

      Standards: ASTM D573, ISO 188<\/p>

      Measured Properties<\/p>

      • Elongation \/ Tensile Elongation:
        Percentage change in the length of the specimen relative to its original length after aging.
        Units: %<\/li>
      • Tensile Strength:
        Maximum tensile force the specimen can withstand after aging.
        Units: MPa or N\/mm\u00b2<\/li>
      • Hardness:
        Changes in surface hardness of the specimen after exposure to aging conditions.
        Units: Shore A or Shore D<\/li>
      • Dimensional \/ Volume Change:
        Swelling, shrinkage, or deformation of the specimen due to heat or aging environment.
        Units: % or mm<\/li>
      • Surface Cracking \/ Degradation:
        Observation and recording of cracks, flaking, or surface embrittlement of the specimen.
        Units: Qualitative \/ Graded<\/li>
      • Color \/ Surface Appearance:
        Changes in color or gloss of the specimen surface due to heat or oxygen exposure.
        Units: \u0394E or GU (Gloss Units)<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t
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        \n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"\"\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
        \n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"\"\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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        \n\t\t\t\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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        Rubber, vulcanized or thermoplastic – Determination of the effect of liquids<\/b><\/p>

        \u00a0<\/b><\/p>

        Purpose: Evaluation of the resistance of vulcanized and thermoplastic rubbers to the action of liquids, based on measuring the properties of the rubbers before and after immersion in test liquids.<\/p>

        Standards: ASTM D471, ISO 1817<\/p>

        Measured Properties<\/p>

        • Mass Change \/ Weight Gain or Loss:
          The amount of weight increase or decrease of the specimen after immersion in the test liquid.
          Units: % or g<\/li>
        • Dimensional \/ Length Change:
          Change in the length of the specimen relative to its original length after immersion.
          Units: %<\/li>
        • Volume Change:
          Change in the specimen\u2019s volume due to liquid absorption or swelling.
          Units: %<\/li>
        • Hardness Change:
          Increase or decrease in the surface hardness of the specimen after immersion.
          Units: Shore A or Shore D<\/li>
        • Visual \/ Surface Appearance:
          Observation of changes such as discoloration, cracking, swelling, or other surface alterations.
          Units: Qualitative \/ Graded<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t
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          \n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"\"\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

          Operating Fluorescent Ultraviolet (UV) Lamp Apparatus for Exposure of Materials Purpose: Assessment of materials\u2019 resistance (plastics, rubbers, coatings, and paints) to UV-induced aging and degradation under simulated weathering conditions. Standard: ASTM G154 \u00a0Measured Properties Color Change (\u0394E):Measurement of sample color variation using a spectrophotometer or visual method.Units: \u0394E (CIE Lab) Gloss \/ Surface Appearance:Decrease or […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":588,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-2934","page","type-page","status-publish","hentry"],"yoast_head":"\nHeat Cycling and conditioning - RMS Lab Group<\/title>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Heat Cycling and conditioning - RMS Lab Group\" \/>\n<meta property=\"og:description\" content=\"Operating Fluorescent Ultraviolet (UV) Lamp Apparatus for Exposure of Materials Purpose: Assessment of materials\u2019 resistance (plastics, rubbers, coatings, and paints) to UV-induced aging and degradation under simulated weathering conditions. 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