CAJ | 학술논문

以己内酰胺、己二酸、聚丙二醇(PPG)等为原料，采用高压反应釜进行熔融缩聚，合成了一系列热塑性弹性体尼龙6-b-PPG(PA6-b-PPG)嵌段共聚物。通过傅立叶变换红外分析、核磁共振氢谱对其化学结构进行表征，通过差示扫描量热、热失重分析其热性能，通过差示扫描量热分析、广角X射线衍射及偏光显微镜分析其结晶性能，并测试了材料的力学性能。结果表明，聚合产物为PA6硬段与PPG软段的嵌段共聚物；制备的系列PA6-b-PPG嵌段共聚物熔点在209～225℃之间，起始热分解温度在380～397℃之间。随着PPG含量的增加，PA6-b-PPG嵌段共聚物从γ型结晶向α型结晶转变，密度、硬度、拉伸强度、弯曲强度逐渐降低，而断裂伸长率逐渐增加。可以通过调整软硬段的比例得到不同力学性能的PA6-b-PPG嵌段共聚物，以满足不同条件下的需求。
이기내선알、기이산、취병이순(PPG)등위원료，채용고압반응부진행용융축취，합성료일계렬열소성탄성체니룡6-b-PPG(PA6-b-PPG)감단공취물。통과부립협변환홍외분석、핵자공진경보대기화학결구진행표정，통과차시소묘량열、열실중분석기열성능，통과차시소묘량열분석、엄각X사선연사급편광현미경분석기결정성능，병측시료재료적역학성능。결과표명，취합산물위PA6경단여PPG연단적감단공취물；제비적계렬PA6-b-PPG감단공취물용점재209～225℃지간，기시열분해온도재380～397℃지간。수착PPG함량적증가，PA6-b-PPG감단공취물종γ형결정향α형결정전변，밀도、경도、랍신강도、만곡강도축점강저，이단렬신장솔축점증가。가이통과조정연경단적비례득도불동역학성능적PA6-b-PPG감단공취물，이만족불동조건하적수구。
Taking caprolactam,adipic acid,polypropylene glycol(PPG) and etc. as raw materials,a series of thermoplastic elastomers PA6-b-PPG block copolymers were synthesized by melt polycondensation in the autoclave. Chemical structure of PA6-b-PPG block copolymer was characterized by FTIR and 1H-NMR,thermal properties were measured by DSC and TG, crystallization behaviors were analysed by DSC,WAXD and PLM,mechanical properties were also tested. The results show that block copolymerization between PA6 hard segment and PPG soft segment occurs. Melting points of the block copolymers vary from 209℃to 225℃and initial thermal decomposition temperatures vary from 378℃to 397℃. The crystalline type of the block copolymers transform fromγ-modification toα-modification with the content of PPG increasing. The density,shore hardness, tensile strength and flexural strength of the block copolymers decrease and elongation at break increases with the content of PPG increasing. The block copolymers with different mechanical properties can be gained through adjusting the ratio of soft segment and hard segment in order to meet the requirements in different conditions.