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                                                                     EXHIBIT 2.1

                AMENDMENT TO AGREEMENT AND PLAN OF CONSOLIDATION

         This AMENDMENT TO AGREEMENT AND PLAN OF CONSOLIDATION ("Amendment"),
dated as of August 15, 2000, by and among The Geon Company, a Delaware
corporation ("Geon"), M.A. Hanna Company, a Delaware corporation ("Hanna") and
Consolidation Corp., an Ohio corporation ("Consolidation Corp."); (collectively
the "Parties").

                                    Recitals

         WHEREAS, Geon and Hanna are parties to an Agreement and Plan of
Consolidation (the "Agreement") dated as of May 7, 2000;

         WHEREAS, the Agreement anticipated that Consolidation Corp. would be a
party to the Consolidation contemplated by the Agreement but Consolidation Corp.
had not been incorporated when the Agreement was executed;

         WHEREAS, Consolidation Corp., 50% of the stock of which is owned by
Geon and 50% of the stock of which is owned by Hanna, was incorporated
subsequent to the date of the Agreement;

         WHEREAS, Geon and Hanna have determined to amend certain provisions of
the Agreement, including adding Consolidation Corp. as a party to the Agreement;

         WHEREAS, pursuant to Section 7.3 of the Consolidation Agreement, the
Boards of Directors of Geon and Hanna have determined that an amendment to the
Consolidation Agreement as set forth below is necessary and desirable in
connection with the foregoing, and Geon and Hanna, pursuant to the terms of the
Agreement, desire to evidence such amendment in a writing signed by the parties.

         NOW THEREFORE, in consideration of the foregoing and the mutual
agreements set forth herein, the parties agree as follows:

         1. ADDITION OF CONSOLIDATION CORP. The Agreement is amended to add
Consolidation Corp. as a party to the Agreement for all purposes, and
Consolidation Corp. agrees to be bound by the terms of the Agreement.

         2. STATUTORY AGENT. Exhibit A to the Agreement, the articles of
incorporation of the Resulting Corporation, is amended by striking Article
TWELFTH thereof. Section 1.6 of the Agreement is amended by striking the
following text:

                  "The statutory agent upon whom any process, notice or demand
                  against Hanna, Geon, Consolidation Corp. or the Resulting
                  Corporation may be



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                  served will be the statutory agent set forth in articles of
                  incorporation attached hereto as Exhibit A."

and substituting in lieu thereof the following text:

                  "The statutory agent upon whom any process, notice or demand
                  against Hanna, Geon, Consolidation Corp. or the Resulting
                  Corporation may be served will be CT Corporation System. The
                  complete address of the agent is: 1300 East 9th Street,
                  Cleveland, Ohio 44114."

         3. AMENDMENT OF SECTION 5.15(c). Section 5.15(c) is amended by striking
the following text at the end of such Section:

                  "including without limitation, the employment agreements
                  entered into between Hanna and Phillip D. Ashkettle and
                  between Geon and Thomas A. Waltermire."

and substituting in lieu thereof a period.

         4. AMENDMENT TO SECTION 5.17(a). Section 5.17(a) is amended by striking
the following text:

                  "Phillip D. Ashkettle"

and substituting in lieu thereof:

                  "Carol A. Cartwright".

         5. AMENDMENT OF SECTION 5.17(b). Section 5.17(b) is amended by striking
the following text:

                  "As of the Effective Time, the Chairman and Chief Executive
                  Officer of the Resulting Corporation will be Phillip D.
                  Ashkettle, the President and Chief Operating Officer of the
                  Resulting Corporation will be Thomas A. Waltermire, and the
                  senior officers of the Resulting Corporation will be those
                  individuals recommended to the Board of Directors of the
                  Resulting Corporation by the Chairman and Chief Executive
                  Officer and the President and Chief Operating Officer of the
                  Resulting Corporation, and such persons will hold office until
                  their respective successors are duly elected and qualified or
                  until their earlier death, resignation or removal in
                  accordance with the Resulting Corporation's regulations set
                  forth as Exhibit B hereto."

and substituting in lieu thereof the following text:



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                  "As of the Effective Time, the Chairman, Chief Executive
                  Officer and President of the Resulting Corporation will be
                  Thomas A. Waltermire, and the senior officers of the Resulting
                  Corporation will be those individuals recommended to the Board
                  of Directors of the Resulting Corporation by the Chairman,
                  Chief Executive Officer and President of the Resulting
                  Corporation, and such persons will hold office until their
                  respective successors are duly elected and qualified or until
                  their earlier death, resignation or removal in accordance with
                  the Resulting Corporation's regulations set forth as Exhibit B
                  hereto."


         6. AMENDMENT TO REGULATIONS OF RESULTING CORP. Exhibit B to the
Agreement, the regulations of Resulting Corp., is amended and restated as set
forth in Exhibit B hereto.

         7. NO MATERIAL ADVERSE CHANGE. Geon agrees that the fact that Phillip
D. Ashkettle is no longer Chairman, Chief Executive Officer and President of
Hanna, any payments authorized by the Hanna Board of Directors or the Resulting
Corporation to be made to, or claims made by, Phillip D. Ashkettle as a result
of this fact, and the fact that he will not be serving as the Chairman and Chief
Executive Officer and a Director of the Resulting Corporation, do not and will
not constitute a "material adverse change relating to Hanna" for the purpose of
Section 6.3(d) of the Agreement or a "material adverse effect on Hanna" for the
purpose of Section 3.2(g) of the Agreement.

         8. EFFECTIVENESS. This Amendment shall be deemed effective as of the
date first written above, as if executed on such date. Except as amended hereby,
the Agreement shall remain in full force and effect and shall be otherwise
unaffected by this Amendment.

         9. MISCELLANEOUS. This Amendment shall be deemed to be a contract made
under the laws of the State of Delaware and for all purposes shall be governed
by and construed in accordance with the laws of such state applicable to
contracts to be made and performed entirely within such state. This Amendment
may be executed in any number of counterparts, each of such counterparts shall
for all purposes be deemed to be an original, and all such counterparts shall
together constitute but one and the same instrument. If any provision, covenant
or restriction of this Amendment is held by a court of competent jurisdiction or
other authority to be invalid, illegal or unenforceable, the remainder of the
terms, provisions, covenants and restrictions of this Amendment shall remain in
full force and effect and shall in no way be effected, impaired or invalidated.




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         IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be
fully executed, all as of the date and year first above written.


                                   THE GEON COMPANY


                                   /s/ Thomas A. Waltermire
                                   --------------------------------------
                                   By: Thomas A. Waltermire
                                   Its:  Chairman and Chief Executive Officer


                                   M.A. HANNA COMPANY


                                   /s/ John S. Pyke, Jr.
                                   --------------------------------------
                                   By: John S. Pyke, Jr.
                                   Its:  Vice President, General Counsel and
                                   Secretary


                                   CONSOLIDATION CORP.


                                   /s/ Gregory L. Rutman
                                   ---------------------------------------
                                   By: Gregory L. Rutman
                                   Its:  Secretary