<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31341494</termId><termName>thermal degradation</termName><termType>PT</termType><termNote><![CDATA[ In polymer science, refers to the molecular deterioration of polymers caused by overheating. ]]></termNote><termCreatedDate>2026-03-30 20:32:05</termCreatedDate><relation><relationType>BT</relationType><termId>31317732</termId><termName>degradation</termName><termType>PT</termType></relation></term>  </Zthes>