SEO, YS KIM, KU 2024-01-21T21:34:00Z 2024-01-21T21:34:00Z 2021-09-01 1994-09 0032-3861 https://pubs.kist.re.kr/handle/201004/145522 A new model is proposed for rapid evaluation of the degree of long-chain branching in polymers, which correlates the intrinsic viscosity and the molecular weight. Intrinsic viscosity is expressed as a simple inverse tangent function of molecular weight. The model is based on the observation of theological behaviour of polymer melts and solutions. It can describe the intrinsic viscosity behaviour over a wider range than the Mark-Houwink equation. This model does not use trial and error procedure to decide the threshold molecular weight where the intrinsic viscosity starts to deviate from the Mark-Houwink relation. Calculation by the proposed model of the long-chain branching frequency of low density polyethylene shows good agreement with experimental results in the literature. English ELSEVIER SCI LTD MOLECULAR-WEIGHT VISCOSITY A NEW MODEL FOR RAPID EVALUATION OF THE DEGREE OF LONG-CHAIN BRANCHING IN POLYMERS Article 10.1016/0032-3861(94)90591-6 1 POLYMER, v.35, no.19, pp.4163 - 4167 POLYMER 35 19 4163 4167 scie scopus A1994PH46100020 2-s2.0-0028498808 Polymer Science Polymer Science Article MOLECULAR-WEIGHT VISCOSITY INTRINSIC VISCOSITY INVERSE TANGENT FUNCTION LONG-CHAIN BRANCHING FREQUENCY