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                                                                    Exhibit 4(a)

                             AMENDMENT NO. 1 TO THE
                           FIVE-YEAR CREDIT AGREEMENT

                                                      Dated as of March 31, 2001

                  AMENDMENT NO. 1 TO THE FIVE-YEAR CREDIT AGREEMENT among
POLYONE CORPORATION, an Ohio corporation (the "COMPANY"), the banks, financial
institutions and other institutional lenders parties to the Credit Agreement
referred to below (collectively, the "LENDERS") and CITICORP USA, INC., as
administrative agent (the "AGENT") for the Lenders.

                  PRELIMINARY STATEMENTS:

                  (1) The Company, the Lenders and the Agent have entered into a
Five-Year Credit Agreement dated as of October 30, 2000, and the Letter Waiver
thereto dated as of March 31, 2001 (such Credit Agreement, as so modified, the
"CREDIT AGREEMENT"). Capitalized terms not otherwise defined in this Amendment
have the same meanings as specified in the Credit Agreement.

                  (2) The Company and the Lenders have agreed to amend the
Credit Agreement as hereinafter set forth.

                  SECTION 1. AMENDMENTS TO CREDIT AGREEMENT. The Credit
Agreement is, effective as of the date hereof and subject to the satisfaction of
the conditions precedent set forth in Section 4, hereby amended as follows:

                  (a) The definition of "APPLICABLE MARGIN" in Section 1.01 is
amended by adding at the end thereof the following proviso:

         PROVIDED, that from March 31, 2001 until the date on which the Company
         delivers to the Agent a Consolidated balance sheet of the Company and
         its Subsidiaries as of the end of a fiscal quarter and Consolidated
         statements of income and cash flows of the Company and its Subsidiaries
         for the period commencing at the end of the previous fiscal quarter and
         ending with the end of such quarter, duly certified (subject to year
         end audit adjustments) by the chief financial officer or the controller
         of the Company as having been prepared in accordance with generally
         accepted accounting principles, together with a certificate of said
         officer setting forth in reasonable detail the calculations necessary
         to demonstrate that the Borrowed Debt/EBITDA Ratio for the fiscal
         period then ended is not more than 3.50:1.0, the Applicable Margin
         shall be result of 1.750% per annum minus the sum of the Applicable
         Percentage and, if applicable, the Applicable Utilization Fee.

                  (b) The definition of "Borrowed Debt/EBITDA Ratio" in Section
1.01 is amended by adding the phrase "including their pro rata share of Sunbelt"
immediately before the phrase "on a Consolidated basis as of such date" in
clause (a) thereof.

                  (c) The definition of "EBITDA" in Section 1.01 is amended by
restating clause (e) in full to read as follows:


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                  (e) non-cash extraordinary or unusual losses deducted in
         calculating net income and resulting from business rationalizations and
         facility closures in an aggregate amount from the date hereof not to
         exceed $50,000,000 less non-cash extraordinary or unusual gains added
         in calculating net income, PROVIDED, that for the calendar year 2001,
         such amount included in this clause (e) for extraordinary and unusual
         losses resulting from business rationalizations and facility closures
         shall include cash charges for such losses in an aggregate amount not
         to exceed $14,800,000 in each case determined in accordance with GAAP
         for such period.

                  (d) The definition of "Interest Coverage Ratio" in Section
1.01 is amended by deleting the phrase "including their pro rata share of
Sunbelt" in both clause (a) and clause (b) thereof and substituting therefor the
phrase "including, at any time after demand for performance of the Company's
guaranty of the obligations of Sunbelt has been made, their pro rata share of
Sunbelt".

                  (e) A new Section 5.02(d) is added to read as follows:

                  (d) STOCK REPURCHASES. Purchase, redeem, retire, defease or
         otherwise acquire for value any of its capital stock now or hereafter
         outstanding, or permit any of its Subsidiaries to purchase, redeem,
         retire, defease or otherwise acquire for value any capital stock in the
         Company, except that, so long as no Default shall have occurred and be
         continuing at the time of any action described below or would result
         therefrom, the Company may purchase, redeem, retire, defease or
         otherwise acquire shares of its capital stock if at the time of such
         acquisition the Borrowed Debt/EBITDA Ratio (determined as of the most
         recently ended fiscal period as set forth below) is equal to or not
         greater than 3.50:1.0 and, if the Borrowed Debt/EBITDA Ratio
         (determined as of the most recently ended fiscal period as set forth
         below) is greater than 3.50:1.0, for an aggregate consideration from
         and after March 31, 2001 not to exceed $1,500,000 PROVIDED, that the
         Company may purchase shares of its capital stock in connection with the
         termination of (x) The Geon Company Share Ownership Trust created
         pursuant to the Trust Agreement dated May 5, 2000 between The Geon
         Company and W. David Wilson, as trustee, and (y) the M.A. Hanna
         Associates Ownership Trust created pursuant to the Trust Agreement
         dated September 12, 1991 between M.A. Company and Wachovia Bank of
         North Carolina, N.A., as trustee. For purposes of this Section 5.02(d),
         the Borrowed Debt/EBITDA Ratio shall be determined as of the date on
         which the Company delivers to the Agent a Consolidated balance sheet of
         the Company and is Subsidiaries as of the end of a fiscal quarter and
         Consolidated statements of income and cash flows of the Company and its
         Subsidiaries for the period commencing at the end of the previous
         fiscal quarter and ending with the end of such quarter, duly certified
         (subject to year end audit adjustments) by the chief financial officer
         or the controller of the Company as having been prepared in accordance
         with generally accepted accounting principles, together with a
         certificate of said officer setting forth in reasonable detail the
         calculations necessary to demonstrate the Borrowed Debt/EBITDA Ratio
         for the fiscal period then ended.

                  (f) Section 5.03(a) is amended in full to read as follows:



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                  (a) INTEREST COVERAGE RATIO. Maintain an Interest Coverage
         Ratio during each fiscal quarter set forth below of not less than the
         ratio set opposite such fiscal period:


                            Fiscal Quarter Ended                        Ratio

                                                                 
                  On or before December 31, 2000                       4.50 : 1
                  March 31, 2001                                       3.25 : 1
                  June 30, 2001                                        2.75 : 1
                  September 30, 2001                                   3.00 : 1
                  December 31, 2001                                    3.25 : 1
                  March 31, 2002 and thereafter                        4.50 : 1



                  (g) Section 5.03(b) is amended in full to read as follows:

                  (b) BORROWED DEBT/EBITDA RATIO. Maintain a Borrowed
         Debt/EBITDA Ratio during each fiscal quarter set forth below of not
         more than the ratio set opposite such fiscal period:



                            Fiscal Quarter Ended                        Ratio
                                                                 
                  On or before December 31, 2000                       3.50 : 1
                  March 31, 2001                                       4.00 : 1
                  June 30, 2001                                        4.50 : 1
                  September 30, 2001                                   4.25 : 1
                  December 31, 2001                                    3.50 : 1
                  March 31, 2002 and thereafter                        3.50 : 1



                  SECTION 2. CONDITIONS OF EFFECTIVENESS. This Amendment shall
become effective as of the date first above written when, and only when, on or
before April 27, 2001 the Agent shall have received (a) an amendment fee, for
the account of the Lenders approving this Amendment in an amount equal to 0.25%
of their respective Commitments and (b) counterparts of this Amendment executed
by the Company and the Required Lenders or, as to any of the


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Lenders, advice satisfactory to the Agent that such Lender has executed this
Amendment. This Amendment is subject to the provisions of Section 9.01 of the
Credit Agreement.

                  SECTION 3. REPRESENTATIONS AND WARRANTIES OF THE COMPANY. The
Company represents and warrants as follows:

                  (a) The Company is a corporation duly organized, validly
existing and in good standing under the laws of the jurisdiction indicated in
the recital of parties to this Amendment.

                  (b) The execution, delivery and performance by the Company of
this Amendment and the Credit Agreement and the Notes to be delivered to it, as
amended hereby, are within the Company's corporate powers, have been duly
authorized by all necessary corporate action and do not contravene (i) the
Company's charter or by-laws or (ii) law or any contractual restriction binding
on or affecting the Company.

                  (c) No authorization or approval or other action by, and no
notice to or filing with, any governmental authority or regulatory body or any
other third party is required for the due execution, delivery or performance by
the Company of this Amendment or the Credit Agreement or the Notes to be
delivered by it, as amended hereby, to which it is or is to be a party.

                  (d) This Amendment has been duly executed and delivered by the
Company. This Amendment and the Credit Agreement and the Notes to be delivered
by the Company, as amended hereby, are legal, valid and binding obligations of
the Company, enforceable against the Company in accordance with their respective
terms.

                  (e) To the best of the Company's knowledge, there is no
pending or threatened action, suit, investigation, litigation or proceeding,
including, without limitation, any Environmental Action, affecting the Company
or any of its Subsidiaries before any court, governmental agency or arbitrator
that (i) could be reasonably likely to have a Material Adverse Effect (other
than the Disclosed Litigation) or (ii) purports to affect the legality, validity
or enforceability of this Amendment or the Credit Agreement and the Notes to be
delivered by the Company, as amended hereby, and there has been no adverse
change in the status, or financial effect on the Company or any of its
Subsidiaries, of the Disclosed Litigation from that described on Schedule
3.01(b) to the Credit Agreement.

                  SECTION 4. REFERENCE TO AND EFFECT ON THE CREDIT AGREEMENT AND
THE NOTES. (a) On and after the effectiveness of this Amendment, each reference
in the Credit Agreement to "this Agreement", "hereunder", "hereof" or words of
like import referring to the Credit Agreement, and each reference in the Notes
to "the Credit Agreement", "thereunder", "thereof"



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                  or words of like import referring to the Credit Agreement,
shall mean and be a reference to the Credit Agreement, as amended by this
Amendment.

                  (b) The Credit Agreement and the Notes, as specifically
amended by this Amendment, are and shall continue to be in full force and effect
and are hereby in all respects ratified and confirmed.

                  (c) The execution, delivery and effectiveness of this
Amendment shall not, except as expressly provided herein, operate as a waiver of
any right, power or remedy of any Lender or the Agent under the Credit
Agreement, nor constitute a waiver of any provision of the Credit Agreement.

                  SECTION 5. COSTS AND EXPENSES. The Company agrees to pay on
demand all costs and expenses of the Agent in connection with the preparation,
execution, delivery and administration, modification and amendment of this
Amendment and the other instruments and documents to be delivered hereunder
(including, without limitation, the reasonable fees and expenses of counsel for
the Agent) in accordance with the terms of Section 9.04 of the Credit Agreement

                  SECTION 6. EXECUTION IN COUNTERPARTS. This Amendment may be
executed in any number of counterparts and by different parties hereto in
separate counterparts, each of which when so executed shall be deemed to be an
original and all of which taken together shall constitute but one and the same
agreement. Delivery of an executed counterpart of a signature page to this
Amendment by telecopier shall be effective as delivery of a manually executed
counterpart of this Amendment.

                  SECTION 7. GOVERNING LAW. This Amendment shall be governed by,
and construed in accordance with, the laws of the State of New York.

                  IN WITNESS WHEREOF, the parties hereto have caused this
Amendment to be executed by their respective officers thereunto duly authorized,
as of the date first above written.

                      POLYONE CORPORATION

                      By
                            ---------------------------------------------------
                            Title:

                      CITICORP USA, INC.,
                      as Agent and as Lender

                      By
                            ---------------------------------------------------
                            Title:


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                      BANK ONE, MICHIGAN

                      By
                            ---------------------------------------------------
                            Title:

                      DEUTSCHE BANK AG NEW YORK AND/OR
                      CAYMAN ISLANDS BRANCH

                      By
                            ---------------------------------------------------
                            Title:


                      By
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                            Title:

                      KEYBANK NATIONAL ASSOCIATION

                      By
                            ---------------------------------------------------
                            Title:

                      ABN AMRO BANK, N.V.

                      By
                            ---------------------------------------------------
                            Title:


                      By
                            ---------------------------------------------------
                            Title:

                      BANK OF AMERICA, N.A.

                      By
                            ---------------------------------------------------
                            Title:

                      COMERICA BANK

                      By
                            ---------------------------------------------------
                            Title:

                      MELLON BANK, N.A.

                      By
                            ---------------------------------------------------
                            Title:


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                      MORGAN GUARANTY TRUST COMPANY OF
                      NEW YORK

                      By
                            ---------------------------------------------------
                            Title:

                      NATIONAL CITY BANK

                      By
                            ---------------------------------------------------
                            Title:

                      SCOTIABANC, INC.

                      By
                            ---------------------------------------------------
                            Title:

                      THE BANK OF NEW YORK

                      By
                            ---------------------------------------------------
                            Title:






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