CAJ | 학술논문

研究聚己内酯(PCL)样条在海水中历经10个月的可降解性能.对每个月取样样品的降解性能通过凝胶渗透色谱(GPC)、差示扫描量热仪(DSC)、傅里叶红外光谱(FTIR)和力学性能进行评价,并对试样的内部形貌采用扫描电镜(SEM)进行观察.SEM照片显示,随着降解时间的增加,材料内部并没有出现明显空洞和裂纹,但样品淬断面变得平整,显示材料的脆性增加.GPC结果显示,随着在海水中降解时间的增加,样品分子量及其分布均逐渐减小;样条的力学性能下降,由于水分子的增塑作用,在海水中降解4～7月期间,样条的拉伸强度和断裂伸长率下降的趋势变缓.DSC分析显示,由于分子链段的断裂和优先降解无定形区域这两方面的共同因素,随着降解时间的增加,样品的结晶度略为增加.FTIR分析测试进一步证明了GPC和DSC的测试分析结果.分析表明PCL样品在海水中具有一定的降解性,但是降解速度较为缓慢.
연구취기내지(PCL)양조재해수중력경10개월적가강해성능.대매개월취양양품적강해성능통과응효삼투색보(GPC)、차시소묘량열의(DSC)、부리협홍외광보(FTIR)화역학성능진행평개,병대시양적내부형모채용소묘전경(SEM)진행관찰.SEM조편현시,수착강해시간적증가,재료내부병몰유출현명현공동화렬문,단양품쉬단면변득평정,현시재료적취성증가.GPC결과현시,수착재해수중강해시간적증가,양품분자량급기분포균축점감소;양조적역학성능하강,유우수분자적증소작용,재해수중강해4～7월기간,양조적랍신강도화단렬신장솔하강적추세변완.DSC분석현시,유우분자련단적단렬화우선강해무정형구역저량방면적공동인소,수착강해시간적증가,양품적결정도략위증가.FTIR분석측시진일보증명료GPC화DSC적측시분석결과.분석표명PCL양품재해수중구유일정적강해성,단시강해속도교위완만.
Degradability of polycaprolactone(PCL) in seawater environment for 10 months was studied. The degradability of samples was studied monthly by GPC, DSC, FTIR and mechanical property analysis, and SEM was used to observe the inner conditions of samples. SEM photographs showed that no void or crackle appeared on the surface of PCL during degradation, but the surface became smoother, which indicated increased brittleness. The values of molecular weight and distribution of composites both decreased as degradation proceeded, meanwhile mechanical properties of PCL also decreased. However, because of the plasticizing effect of water, the decrease tendency of tensile property and elongation rate at break became gentle. DSC results showed: with the combined effect of molecular chain rupture and degradation mainly occurring in amorphous region, the crystallinity of PCL increased slightly as degradation time increased. FTIR results further confirmed the analysis results of GPC and DSC. The analysis showed PCL had certain degradability in seawater, but the biodegradation process was very slow.