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以偶氮二异丁腈（ＡＩＢＮ）为引发剂，甲苯为溶剂，甲基丙烯酸甲酯（ＭＭＡ）与丙烯酸（ＡＡ）经溶液聚合制得共聚物．差热分析（ＤＴＡ）结果表明，在共聚物用量１０ｍｇ，参比物αＡｌ２Ｏ３８ｍｇ，升温速度５℃／ｍｉｎ，仪器灵敏度±１０μＶ，走纸速度４ｍｍ／ｍｉｎ的条件下，ＤＴＡ曲线上可明显观察到共聚物的Ｔｇ，且共聚物玻璃化温度（Ｔｇ）随ＡＡ含量增加而升高，当ＡＡ含量为１１％时，共聚物玻璃化温度（Ｔｇ）达１４７℃
Using azobisisobutyronitrile (AIBN) as initiator and toluene as solvent, the copolymer was prepared by solution polymerization of methyl methacrylate (MMA) and acrylic acid (AA). The results of differential thermal analysis (DTA) showed that the DTA curves were clearly observed under the conditions of 10 mg of copolymer, α-Al 2 O 3 reference substance, 5 ℃ / min heating rate, ± 10μV instrument sensitivity and 4mm / To Tg of the copolymer, and the glass transition temperature (Tg) of the copolymer increased with the AA content increasing. When the content of AA was 11%, the glass transition temperature (Tg) of the copolymer reached 147 ℃