CAJ | 학술논문

以N-甲基吡咯烷酮(NMP)为溶剂，一缩二乙二醇(DEG)为醇解剂，在两者质量比为5∶8且回流温度为210~230℃的条件下，经适量NaOH催化，可有效地使不同苯乙烯(St)含量的不饱和聚酯树脂(UP)固化物去交联化，从而得到了固化UP的醇解产物。对醇解产物进一步水解，得到了反映UP交联网链结构信息的St-富马酸线性共聚物，并采用NMR技术测定了其组成和序列结构，从而获得了不同St含量的固化UP中交联网链的结构特性，即随着St含量增加，St与UP中富马酸酯的共聚倾向于无规共聚，且St段交联网链的平均序列长度增加，表明固化UP的交联密度下降。这些研究结果为通过调节UP中St的含量来调控其固化物的力学性能和热稳定性提供了参考。
이N-갑기필각완동(NMP)위용제，일축이을이순(DEG)위순해제，재량자질량비위5∶8차회류온도위210~230℃적조건하，경괄량NaOH최화，가유효지사불동분을희(St)함량적불포화취지수지(UP)고화물거교련화，종이득도료고화UP적순해산물。대순해산물진일보수해，득도료반영UP교련망련결구신식적St-부마산선성공취물，병채용NMR기술측정료기조성화서렬결구，종이획득료불동St함량적고화UP중교련망련적결구특성，즉수착St함량증가，St여UP중부마산지적공취경향우무규공취，차St단교련망련적평균서렬장도증가，표명고화UP적교련밀도하강。저사연구결과위통과조절UP중St적함량래조공기고화물적역학성능화열은정성제공료삼고。
Taking diethylene glycol (DEG) as alcoholysis agent and N-methyl pyrrolidone (NMP) as solvent,three cured unsaturated polyester (UP) with different styrene content were de-crosslinked effectively under the catalysis of NaOH when the mass ratio of NMP and DEG was 5∶8 and the reflux temperature was 210~230℃and the resultant alcoholysis products were gained. Then the linear styrene-fumarate copolymers which can reflect crosslinking network structure information of the cured UP were obtained after the hydrolysis of the alcoholysis products. The composition and sequence structure of the copolymers were characterized by NMR and the crosslinking network structure characteristic of the cured UP with different styrene content was obtained. It is that with the increase of styrene content,the copolymerization of styrene and fumarate in the curing process of UP tends to form random copolymers,in addition,the average sequence length of polystyrene segments in the crosslinking network of the cured UP increases which indicates the crosslinking density of the cured UP decreases. These results provide references for controlling mechanical properties and thermal stability of the cured UP through changing the styrene content.