To provide a method of grafting galactomannan-type polysaccharide polymers, preferably guar, to a functional group by irradiation with high energy electron beams in the presence of an unsaturated monomer-compressing the described functional group.
The method includes depolymerization of a grafted polymer to a pre-selected low molecular weight. The preferred galactomannan for treatment according to the method is guar gum, guar splits and hydroxypropyl guar. In a preferred embodiment the guar gum is depolymerized, preferably to a molecular weight of below about 700,000 Dalton, and most preferably to a molecular weight of between about 100,000 Dalton and about 250,000 Dalton. The depolymerized guar most preferably has a polydispersity of less than about 3.0 and is useful in oil well fracturing (hydraulic fracturing) to enhance oil production.
PRIOU CHRISTIAN
| JPH08246388A | 1996-09-24 | |||
| JPH08246388A | 1996-09-24 |
JPN6012061474; Ｉｎｄｕｓｔｒｉａｌ ＆ Ｅｎｇｉｎｅｅｒｉｎｇ Ｃｈｅｍｉｓｔｒｙ Ｒｅｓｅａｒｃｈ Ｖｏｌ．３２， Ｎｏ．７, ｐ．１４６４-１４７０ （１９９３）．
JPN6012061473; Ａｃｔａ Ｐｏｌｙｍｅｒｉｃａ Ｖｏｌ．４１， Ｎｏ．１２, ｐ．６２０-６２７ （１９９０）．
JPN6012061474; Ｉｎｄｕｓｔｒｉａｌ ＆ Ｅｎｇｉｎｅｅｒｉｎｇ Ｃｈｅｍｉｓｔｒｙ Ｒｅｓｅａｒｃｈ Ｖｏｌ．３２， Ｎｏ．７, ｐ．１４６４-１４７０ （１９９３）．
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