Avient (AVNT) 8-K 2018 FY Other Events

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in the following Registration Statements:

(1)	Registration Statement (Form S-8 No. 333-231236) pertaining to the PolyOne Supplemental Retirement Benefit Plan (As Amended and Restated Effective January 1, 2014);
(2)	Registration Statement (Form S-8 No. 333-217879) pertaining to the PolyOne Corporation 2017 Equity and Incentive Compensation Plan;
(3)	Registration Statement (Form S-8 No. 333-205919) pertaining to the Amended and Restated PolyOne Corporation 2010 Equity and Performance Incentive Plan;
(4)	Registration Statement (Form S-8 No. 333-181787) pertaining to the PolyOne Corporation 2010 Equity and Performance Incentive Plan;
(5)	Registration Statement (Form S-8 No. 333-166775) pertaining to the PolyOne Corporation 2010 Equity and Performance Incentive Plan
(6)	Registration Statement (Form S-8 No. 333-157486) pertaining to the PolyOne Retirement Savings Plan;
(7)	Registration Statement (Form S-8 No. 333-47796) pertaining to Post Effective Amendment No. 3 on Form S-8 to Form S-4 pertaining to the Geon Company 1993 Incentive Stock Plan, the Geon Company 1995 Incentive Stock Plan, the Geon Company 1998 Interim Stock Award Plan, the Geon Company 1999 Incentive Stock Plan, the PolyOne Corporation Deferred Compensation Plan for Non-Employee Directors, and the M.A. Hanna Company Long-Term Incentive Plan; and
(8)	Registration Statement (Form S-8 No. 333-141029) pertaining to the PolyOne Retirement Savings Plan and the DH Compounding Company Savings and Retirement Plan and Trust.

of our report dated February 19, 2019 (except for Note 1 and Note 3, as to which the date is January 28, 2020), with respect to the consolidated financial statements of PolyOne Corporation and our report dated February 19, 2019 with respect to the effectiveness of internal control over financial reporting of PolyOne Corporation, included in this Current Report on Form 8-K.

/s/ Ernst & Young LLP

Cleveland, Ohio

January 28, 2020