聚丙烯由于其来源丰富,价格便宜和良好的易加工性,在薄膜、纤维、板材和中空管材等方面已有了广泛的应用,已成为国民经济中不可缺少的大品种材料,但是低温脆性和缺乏功能特性是其最大弱点。因此,如何将聚丙烯发展成高性能的工程塑料,将其转化成功能材料,提高其深加工能力和附加价值,是当前研究与发展的热点,也是国际新材料竞争的焦点之一。尽管美、日等国已有聚丙烯微孔膜商品,但属高技术产品,国内尚属空白。在自然科学基金的资助下,浙江大学徐又一科研小组针对聚丙烯弹性与微孔形成机理的研究,在不添加任何助剂的情况下,通过改变加工条件,使高度结晶的聚丙烯分子链的取向与排列方式、以及晶态与非晶态结构发生变化,从而使聚丙烯的薄膜与纤维具有类似橡胶的 Polypropylene has been widely used in many fields such as film, fiber, sheet and hollow pipe due to its rich source, cheap price and good processability. It has become an indispensable large variety of materials in the national economy. However, low temperature brittleness Lack of features is its biggest weakness. Therefore, how to develop polypropylene into high-performance engineering plastics, convert it into functional materials and improve its deep processing ability and added value are the hot points of current research and development and one of the focuses of international new material competition. Although the United States, Japan and other countries already have polypropylene microporous membrane products, but is a high-tech products, the domestic is still blank. With the support of the Natural Science Foundation, Xu Youyi, Zhejiang University research group for polypropylene elastic and micropore formation mechanism without adding any additives, by changing the processing conditions, the highly crystalline polypropylene molecular chain Orientation and arrangement, as well as crystalline and amorphous structure changes, so that the polypropylene film and the fiber has a rubber-like