论文部分内容阅读
橡胶原产地在巴西,最先使用橡胶的是印第安人。远在哥仑布发现新大陆以前,印第安人就懂得用土法来制造橡胶用品。印第安人把橡胶汁浇在自己的脚上,等凝成一层皮膜后,就成为一双合脚而又实用的套鞋。还用橡胶来做盛水器,制法也很简单,先把泥土做成模子,然后把橡胶汁涂上,等干了以后,把土模打碎,凝固的胶汁便成为一个不会漏水的和打不破的盛水器了。据考证:印第安人还用同样的方法做过载人的橡皮船哩。 1492年哥仑布发现海地岛时,看到当地印第安人的孩子在玩一种橡皮做的球,这种球掉在地上,竟然会跳得很高,觉得稀奇,就把它带回欧洲,这是欧洲人第一次同橡胶接触,但是他们还不懂得怎样使用它。后来,西班牙人向印第安人学会了制作橡胶用品的方法,橡胶逐渐地引起欧洲人的注意。1736年法国科学院组织一支赤道探险队,到厄瓜多尔考察,并提出了一项有关橡胶的报告,从而引起了人们研究橡胶的兴趣。1770年英国化学家普利斯特利发现凝固的橡胶可以擦去铅笔写下的字迹。1819年
Origin of rubber in Brazil, the first to use rubber is Indians. Before Columbus discovered the New World, Indians learned to use indigenous soil to make rubber products. Indians pour rubber juice on their own feet, and so on into a layer of film, it becomes a pair of practical and practical overshoes. Also use rubber to do water, the system is also very simple, the first mold made of soil, and then coated with rubber juice, and so on after the soil cracked, frozen glue will become a will not leak And can not break the water-filled. According to research: Indians also used the same method of manned rubber boat miles. When Corunbo discovered the island of Haiti in 1492, he saw the native Indians’ children playing a rubber-made ball that fell to the ground and would jump high and find it curious to bring it back to Europe, This is the first time Europeans have come into contact with rubber, but they do not yet know how to use it. Later, the Spaniards learned how to make rubber products for Indians, and rubber gradually attracted the attention of Europeans. In 1736, the French Academy of Sciences organized an equatorial expedition to visit Ecuador and presented a report on rubber, which aroused people’s interest in studying rubber. 1770 British chemist Priestley found that the solidified rubber can wipe the written writing by pencil. 1819 years