The relative molecular mass of the resultant PPTA pulps can be improved by the addition of ammonia as the acid accepted agent and it has no influence on other properties.
而液氨的加入也有利于提高PPTA浆粕的相对分子质量，但对浆粕的其它性能没有任何影响。
The relative molecular mass of the resultant PPTA pulps can be improved by the addition of ammonia as the acid accepted agent and it has no influence on other properties.
而液氨的加入也有利于提高PPTA浆粕的相对分子质量，但对浆粕的其它性能没有任何影响。
应用推荐