摘要
以辛酸亚锡为催化剂,分别以聚乙二醇、甲基丙烯酸羟乙酯、三羟甲基丙烷、季戊四醇、甘露醇和山梨醇等和L-丙交酯反应,得到末端为羟基的线形和星形聚L-丙交酯。通过和甲基丙烯酰氯反应,在上述线形和星形聚L-丙交酯成功引入双键,得到了相应的反应性大分子单体,其双键的存在经红外谱图和高锰酸钾试验得到证实。通过在过氧化二苯甲酰引发下的热交联,研究了上述大分子单体的反应性,发现端基数对交联产物的性质有一定影响。溶解试验、凝胶含量测定和热重分析表明,端基数目较多的大分子单体的交联产物有较高的凝胶含量,交联密度较大,热性能较好。
Linear and star-shaped hydroxy-terminated poly（ L-lactide）s were synthesized by reacting L-lactide with co-initiators such as poly（ethylene glycol）, hydroxyethyl methycrylate, trimethylolpropane,mannitol and sorbierite in the presence of stannous octoate as catalyst. Double bond was introduced to the linear and star-shaped poly （L-lactide）s through reacting with methylcryloyl chloride to obtain reactive macromonomers. The double bond was confirmed by infrared spectrum and potassium hypermanganate lest. The reactivity of macromonomers was studied by means of thermo-crosslinking initiated by benzoyl peroxide. It was found that the properties of the products were influenced by the numbers of terminal groups. Dissolubility test, gel fraction determination and TGA showed thai the more ,he terminal groups of macromonomers were, the higher gel fraction and crosslink density and the better thermostability would be.
出处
《化工科技》
CAS
2006年第6期16-20,共5页
Science & Technology in Chemical Industry
基金
上海市教委自然科学基金资助项目(L0135)
