Dr Ashish Lele, Director CSIR- National Chemical Laboratory delivered prestigious Santappa Raghavan Memorial Lecture 2025 on the topic "Molecular Topology to Industrial Processing of Entangled Polymers" This memorial lecture series has been instituted to honour the exemplary contributions of Prof. Santappa (a polymer chemist and former Director CSIR-CLRI) and Dr KV Raghavan (an outstanding chemical engineer and former Director CSIR-CLRI and CSIR-IICT) to the field of Polymer Science and Engineering, and to inspire researchers and students alike