<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31373493</termId><termName>polymethyl methacrylate</termName><termType>PT</termType><termNote><![CDATA[ Polymerized methyl methacrylate is a compound having a hard and glasslike appearance, with softening temperature from 105-125 C. Classified as bioinert. As a resin, widely used as a glass substitute (e.g., Plexiglass (TM)) and a bonelike material for prosthetics. First commercially sold in 1933 as a glass substitute. ]]></termNote><termCreatedDate>2026-03-30 20:40:43</termCreatedDate><relation><relationType>UF</relationType><termId>31373494</termId><termName>PMMA</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31373495</termId><termName>methacrylate, polymethyl</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31373496</termId><termName>poly methyl-methacrylate</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31373497</termId><termName>poly(methyl methacrylate)</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31373498</termId><termName>polymerized methyl methacrylate</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31373499</termId><termName>polymethylmethacrylate</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31343235</termId><termName>polymers</termName><termType>PT</termType></relation><relation><relationType>BT</relationType><termId>31409812</termId><termName>polyacrylate</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31299296</termId><termName>Lucite (TM)</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31299297</termId><termName>Perspex (TM)</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31299299</termId><termName>Plexiglas (TM)</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31370838</termId><termName>acrylic</termName><termType>PT</termType></relation></term>  </Zthes>