環(huán)氧樹(shù)脂與不飽和樹(shù)脂的性能差異：
Performance difference between epoxy resin and unsaturated resin:
1.環(huán)氧樹(shù)脂：耐磨性好，強(qiáng)度高，粘度大，但抗氧化性差，易泛黃；一般固化速度較慢，一般要24小時(shí)才能固化，5天以上才能達(dá)到高強(qiáng)度；單價(jià)更高，特殊改性的耐黃變環(huán)氧樹(shù)脂會(huì)更高。
1. Epoxy resin: good wear resistance, high strength, high viscosity, but poor oxidation resistance and easy to yellowing; Generally, the curing speed is slow. Generally, it takes 24 hours to cure and more than 5 days to achieve high strength; The unit price is higher, and the price of specially modified yellowing resistant epoxy resin will be higher.
2.不飽和樹(shù)脂：物理性能稍低，經(jīng)濟(jì)便宜，固化速度快，基本上20分鐘凝膠，2小時(shí)固化，24小時(shí)即可達(dá)到高強(qiáng)度，同時(shí)其耐候性略優(yōu)于環(huán)氧樹(shù)脂。
2. unsaturated resin: low physical properties, cheap economy, fast curing speed, basically 20 minutes gel, 2 hours curing, 24 hours to achieve high strength, and its weathering resistance is slightly better than epoxy resin.
為什么廣泛使用環(huán)氧樹(shù)脂？雖然不飽和樹(shù)脂固化很快，但潛在的風(fēng)險(xiǎn)是它很脆，而且厚的樹(shù)脂層在沒(méi)有增強(qiáng)材料的情況下非常容易開(kāi)裂。使用大多數(shù)不飽和樹(shù)脂凝膠時(shí)，甚放熱峰頂超過(guò)150℃，這也是一個(gè)潛在的隱患。
Why is epoxy resin widely used? Although the unsaturated resin solidifies quickly, the potential risk is that it is brittle and the thick resin layer is very easy to crack without reinforcement. The use of most unsaturated resin gels and even exothermic peaks above 150 degrees is also a potential hazard.
3.另一個(gè)問(wèn)題是附著力的差異。即使普通環(huán)氧樹(shù)脂的附著力不牢固，不飽和樹(shù)脂更不適合周圍沒(méi)有增強(qiáng)體的情況。
3. Another problem is the difference in adhesion. Even if the adhesion of ordinary epoxy resin is not firm, unsaturated resin is not suitable for the situation where there is no reinforcement around.
