CAJ | 학술논문

以玉米淀粉、低密度聚乙烯和线型低密度聚乙烯为主要原料,制得光/生物降解塑料薄膜,所得降解薄膜中淀粉质量分数约为30%,厚度约为20 μm.研究结果表明:吹膜料的流变性能接近聚乙烯,为剪切变稀的假塑性流体,可用通用塑料加工设备加工;该薄膜的力学性能接近纯聚乙烯薄膜,并具有较好的光降解性能;薄膜经紫外光照射或曝露在户外均可发生明显降解,其降解产物中含有羰基和不饱和碳-碳双键的聚合物.
이옥미정분、저밀도취을희화선형저밀도취을희위주요원료,제득광/생물강해소료박막,소득강해박막중정분질량분수약위30%,후도약위20 μm.연구결과표명:취막료적류변성능접근취을희,위전절변희적가소성류체,가용통용소료가공설비가공;해박막적역학성능접근순취을희박막,병구유교호적광강해성능;박막경자외광조사혹폭로재호외균가발생명현강해,기강해산물중함유탄기화불포화탄-탄쌍건적취합물.
Photo-biodegradable plastic films containing 30 wt% of corn starch with thickness of about 20μm were prepared by using corn starch, low-density polyethylene(LDPE) and linear low-density polyethylene(LLDPE) as main materials. The processing properties of master-batch and the blend for blowing films were investigated. The rheological properties of the blend for blowing films were similar to that of LDPE, the mixture of master batch and LLDPE was pseudo-plastic fluid and could be processed by using classical plastic machines. The mechanical properties and photo-degradation properties of the films were also studied. The experiment results showed that the mechanical properties of the films approximated to that of LDPE film, and the films had good photo-degradation properties. After 15 days of exposure to ultraviolet light, some lower molecular weight polymers with carbonyl group or carbon-carbon double bond were detected in the degraded films.