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  <xs:element id="ucc_SuperFundSitesMember" abstract="true" name="SuperFundSitesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ucc_AsbestosRelatedLiabilityPendingClaimsPercentage" abstract="false" name="AsbestosRelatedLiabilityPendingClaimsPercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="ucc_AsbestosRelatedLiabilityFutureClaimsPercentage" abstract="false" name="AsbestosRelatedLiabilityFutureClaimsPercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="ucc_FinancialInstrumentsGrossUnrealizedGains" abstract="false" name="FinancialInstrumentsGrossUnrealizedGains" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucc_FinancialInstrumentsGrossUnrealizedLoss" abstract="false" name="FinancialInstrumentsGrossUnrealizedLoss" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucc_CashEquivalentsFairValue" abstract="false" name="CashEquivalentsFairValue" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucc_ActivityBasedCostsMember" abstract="true" name="ActivityBasedCostsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ucc_CommodityAndRawMaterialPurchasesMember" abstract="true" name="CommodityAndRawMaterialPurchasesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ucc_NetCommissionExpenseMember" abstract="true" name="NetCommissionExpenseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ucc_GeneralAdministrativeAndOverheadTypeServicesAndServiceFeeMember" abstract="true" name="GeneralAdministrativeAndOverheadTypeServicesAndServiceFeeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ucc_DowChemicalCompanyMember" abstract="true" name="DowChemicalCompanyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ucc_OwnershipInterestPercentageRelatedCompany" abstract="false" name="OwnershipInterestPercentageRelatedCompany" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="ucc_RestofWorldMember" abstract="true" name="RestofWorldMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
