PLLA/脱脂棉等温结晶行为研究  

Study on Isothermal Crystallization Behavior of PLLA/Cotton

作　　者：石文鹏[1] 徐应林[1] 张宁[1] 王晓琴[1] 

机构地区：[1]常州轻工职业技术学院轻化系,江苏常州213164

出　　处：《塑料科技》2014年第12期79-84,共6页Plastics Science and Technology

摘　　要：合成并表征了线型、三臂和四臂左旋聚乳酸(PLLA),利用DSC研究了不同分子量,不同链结构左旋聚乳酸及左旋聚乳酸/脱脂棉在130℃时等温结晶行为,并用XRD测试了左旋聚乳酸/脱脂棉在130℃形成的晶体结构。结果显示:脱脂棉对数均分子量低于1×105的线型左旋聚乳酸,高于1×104的三臂、四臂左旋聚乳酸具有成核作用;对于数均分子量高于1×105的线型左旋聚乳酸和分子量低于1×104的三臂左旋聚乳酸不具成核作用。The linear, tri-arm and four-arm poly（L-lactide）s（LPLLA, TPLLA and FPLLA） were synthesized and characterized. The isothermal crystallization behaviors and crystal structure of PLLA which had different molecular weight or different chain structures, and PLLAJcotton （4/1） at 130℃ were investigated by different scanning calorimetry （DSC） and X-ray diffraction （XRD）, respectively. The results show that the LPLLA with molecular weight less than 1×10^5 and the TPLLA and the FPLLA with molecular weights more than 1× 10^4 can nucleate on the surface of cotton, but the LPLLA with molecular weight more than 1 × 10^5 or the TPLLA and the FPLLA with molecular weights less than 1 × 10^4 has no nucleation.

关 键 词：左旋聚乳酸 链结构 数均分子量 脱脂棉 

分 类 号：O631.13[理学—高分子化学]