CAJ | 학술논문

采用阴离子聚合法合成了一系列聚酰胺6-聚乙二醇(PA6-PEG)嵌段共聚物，对己内酰胺/PEG 投料比对共聚物热性能的影响进行重点研究，并分析此方法所得产物的结晶性能。通过傅里叶变换红外光谱、差示扫描量热仪、XRD等测试对产物结构、热性能及结晶性能进行了分析。研究结果表明：嵌段共聚物以酯基相连；PEG 质量分数低于20%时，熔点呈规律性下降；高于20%时，共聚物的熔点波动性较大，己内酰胺/PEG 的投料比不能决定共聚产物的熔点；己内酰胺/PEG配比相同时，PEG相对分子质量越低，共聚物的熔点也越低；通过阴离子聚合法更容易得到热力学非稳态的γ晶型产物。
채용음리자취합법합성료일계렬취선알6-취을이순(PA6-PEG)감단공취물，대기내선알/PEG 투료비대공취물열성능적영향진행중점연구，병분석차방법소득산물적결정성능。통과부리협변환홍외광보、차시소묘량열의、XRD등측시대산물결구、열성능급결정성능진행료분석。연구결과표명：감단공취물이지기상련；PEG 질량분수저우20%시，용점정규률성하강；고우20%시，공취물적용점파동성교대，기내선알/PEG 적투료비불능결정공취산물적용점；기내선알/PEG배비상동시，PEG상대분자질량월저，공취물적용점야월저；통과음리자취합법경용역득도열역학비은태적γ정형산물。
A series of PA6-PEG segmented copolymer was synthetized through anionic polymerization. The effect of caprolactam/PEG feeding ratio on thermal properties was focused on,and the performance of crystallization of the copoly-mer was also analyzed. The structure,thermal and crystalline properties of the products were studied with Fourier transform infrared spectroscopy,differential scanning calorimetry,XRD and other tests. The results showed that the products were segmented copolymers connected with ester bonds;the melting point declines regularly when the PEG mass percentage was less than 20%.However it had big volatility when the percentage was more than 20%,which could indicate that the caprolac-tam/PEG ratio was not the decisive factor of the melting point. The melting point of the copolymer went down when the rela-tive molecular mass of PEG was low but the caprolactam/PEG ratio was the same. It was easier to get thermodynamically unsteadyγpolymorph products by anionic polymerization.