苯并噁嗪树脂的发展及优点

关键词:苯并噁嗪树脂,酚醛树脂,机械强度高 酚醛树脂具有稳定性好、机械强度高、耐化学腐蚀、阻燃等许多优点,目前广泛的应用于制造日用品、涂料、制造树脂砂轮,覆铜板以及航空工业中高科技制品等诸多产品。然而酚醛树脂基高分子材料也有许多缺陷,比如机械性能比较脆,使用寿命短等。限制了在一些特殊领域的应用。另外酚醛树脂固化需要添加强酸等催化剂、固化过程会侵蚀制造设备,反应中会释放出水分子和氨等副产物,导致固化产物出现微孔而影响制品的性能。 为了克服这些缺点,一种新型酚醛树脂——苯并噁嗪树脂得到重点研究和开发。苯并噁嗪树脂不仅具有酚醛树脂的耐热性、阻燃性、机械性能优良等特点,而且有着和环氧树脂一样灵活的分子设计性。 苯并噁嗪化合物由Cope和Holy在1940年合成,但他的聚合特性在当时未被发现,直到20世纪90年代才得到开发,由此引起众多研究者的关注,并对其进行了大量的研究。苯并噁嗪树脂分子结构的设计性十分灵活,可以根据使用要求,设计不同的分子结构,引入功能基团,制备具有特殊功能的材料。 此外,本公司AMEX苯并噁嗪树脂还具有以下特点: 1、 固化过程体积“零收缩” 2、 固化不需要强酸等催化剂 3、 固化过程中无副产物生成 4、 玻璃转变温度(Tg)高,甚至高于固化温度 5、 热稳定性好,残炭率高 6、 吸水率低

苯并噁嗪树脂与传统树脂对比

For challenging applications, Huntsman benzoxazine resins are an ideal alternative to conventional epoxy, phenolic and BMI resin systems. Epoxy: Benzoxazine resins are 50% stiffer than traditional epoxies with flexural moduli in the 4,500 – 5,300 MPa range. The hot/wet performance of the new resins is also better than that of epoxy materials. The benzoxazines also offer lower shrinkage during cure. Phenolic: Benzoxazine resins produce higher part accuracy with less micro-cracking than phenolic resins and do not generate volatiles during cure – [...]

苯并噁嗪树脂适合在高温使用

The use of liquid resin processes such as resin transfer molding (RTM) and vacuum assisted RTM (VARTM) has developed rapidly in recent years. There is a need to use these processes more extensively in future aerospace structures because large and complex parts can be manufactured economically, and the costs of autoclave processing of prepreg materials can be avoided. Despite the benefits of liquid resin processes, there are challenges to extending their use to primary structure and high temperature applications [...]