90% ϴ Ÿ̾ õ ռ ͼ ⸦ ̿ Ŀ Ȳ ǰ ǰ , 뵵 ° ȭ Ư ߾ ̿ǰ ִ. ڷ پ ʷ ̿뿡 Ư ȭ ̿ ġ Ŀ Ȯ ʿ伺 Ӿ 䱸Ǿ Դ. 帧 ϴ پ ؼ, Ư ľ ſ ߿ϰ ̿ǰ ִ. ̿Ǵ ַ ܼӵ Mooney Viscometer ܼӵ RPA(Rubber Processing Analyzer) μ ؿԴ.
öƽ ŵ Ȯϱ Motor driven Capillary Rheometer(MCR), Extrusion Capi-llary Rheometer(ECR), Rubber Screw Rheometer(RSR) ̿Ͽ õ ռ ŵ 캸 Ѵ. Capillary rheometer ϴ melt instability ϱ Extrudate Swell ExtruScan(MKE co., Korea) ̿Ͽ.
õ 1(MV 80), ռ BR 3(MV42, MV58, MV66), s-SBR 4(MV55, MV61, MV73, MV74), e-SBR 2(MV49, MV52) 10 м Ͽ.
Motor driven Capillary Rheometer (MCR)
ʹ ڼ ϴµ ̿Ǵ ̸, ijʷ reservior Ḧ ־ Ų ǽ ӵ ϰ ڸ ӵ 帧 ´. ̶ ijʷ ϴ з° ǽ ̵ ̿Ͽ ܼӵ (1) (2) ϰ ȴ.[1]
¿ ӵ μ Ÿ.
Extrusion Capillary Rheometer (ECR)
Extrusion Capillary Rheometer (Rubber Pro-cessing Evaluator, MKE co., Korea) Ǵ ȭ ũ ȸ Cap-illary die Ŵ ϴ ġ̴. ܼӵ ũ ӵ ⷮ, ̿ ġ з° ̿Ͽ Ѵ. ̴ (3) (4) Ÿ ٿ . Capillary Diame-ter(D), ũ ӵ rpm ȭ Ǵ з(P) ⷮ(G) ̿Ѵ. ECR MCR Q G ش melt density ־ ӵ ִ.[2]
¿ ӵ μ Ÿ. ϴ extrudate instability 캸 ECR Extrudate Swell ⸦ Ͽ Ͽ.
Rubber Screw Rheometer(RSR)
Rubber Sc-rew Rheometer(MKE co. Korea) ¿ Ͽ ϴ з° ũ ȸ 踦 ̿Ͽ ϴ ̴. Լ ũ ӵ ϸ鼭 Ÿ ΰ ġ з° з ũ ӵ 迡 ܼӵ Ѵ. ̴ (closed discharge) Ǵ Ÿ ϴ ξз ̸ ִٴ Ư ̿ ̴. ܼӵ (5) (6) Ÿ ٿ .[3],[4]
Ŀ Ÿ ȣ, (D), ũ ä (H), з°谡 ġ ä (k) ũ ӵ rpm(N) ȭ Ǵ k ä з(P) ̿Ѵ.
öƽ ܼӵ ִ Motor driven Capillary Rheometer (MCR), Extrusion Capillary Rheo-meter(ECR), Rubber Screw Rheo-meter(RSR) ̿Ͽ õ ռ Ͽ. Capillary Rheometer Ÿ melt instability ȮϿ.
Gum rubber 10 ⸶ 100, 110, 120 µ Լ Ͽ.
ijʷ ECR MCR Լ < 1> Ÿ ٿ MV58 Ÿ ȮϿ. κ ġϴ ȮεǾ. ̴ MCR < 3> Ÿ ٿ ϴ ū ִ.
RSR MCR ݺ Ͽ. < 3> < 4> Ÿ ٿ MCR ̵ 7% ̵ 10% ̻ ־, ijʷ ̿ ŷ Ȯ ־. RSR ݺ ̵ 2%, ִ 3%Ϸ ÷ῡ ݺ Ÿ.
RSR MCR ϸ ÷ῡ ܼӵ ̰ ũ ϴ ־, < 2> MV58÷ῡ Ͽ.
ECR ̿Ͽ ؼ Ȯ Ҵ. ECR ܼӵ Melt instability Ͽ.< 5> ̷κ MCR, ECR ijʷ ʴ Ȯ ־. ̴ ijʷ ̿ 帧 ̸, ߴ 帧 Ͽ Ѵ. 帧 ̿ ϴ melt instability ȮεǾǷ ECR ƴ ȮϿ.[5],[6]
ݸ RSR ̿Կ melt instability , ݺ ο ִ. ۵ RSR Ͽ Ÿ ϴٰ Ǿ ʿϴ.
2021 ȭкǰ Ȯ 纰 ũ Դϴ.(NO.2019R1I1A2A01060420)
õ ռ ֽ ؼŸ̾ в 帮, MCR ֽ ִб տ 帳ϴ.
1. ASTM D3835, Standard Test Method for Determination of Properties of Polymeric Materials by Means of a Capillary Rheo-meter, American society for testing and materials, Philadelphia, USA
2. ASTM D5099-08, Standard Test Methods for Rubber-Measurement of Processing Properties Using Capillary Rheometery, Philadelphia, USA
3. D.B. Todd, C.G.Gogos, M.Esseghir, D.-W. Yu, and S.Widagdo, Moni-toring process viscosities with a New On-Line Rheo-meter, Plastics Engine-ering, 53 March '97,107 (1997)
4. Myung-Ho Kim, Young-Tak Oh, Young-Cheol Yang, Hyun Young Lee, Shi-Ho Lee, "Meas-urement for Vis-cosity Functions of Pure and Blowing Agent Laden Polymer Systems Using Screw Rheometer" SPE ANTEC May 2017
5. Chris Macosko, RHEOLOGY prin-ciples, measurements, and applications, p.238~257, (1993)
6. Henri G. Burhin, Viscosity Measu-rement of filled Rubber Compounds- New insight for Error free Measure-ments, KGK, 2021
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