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Polyimide material can be used to produce plastics, composites, films, adhesives, fibers, foams, liquid crystal aligning agent, a separation membrane, a photoresist, etc., a high-performance polymeric material in many fields has become an irreplaceable materials. In a variety of application areas, polyimide (PI) excellent solvent resistance and heat resistance with other materials unparalleled advantages, but these hinder its processing is the biggest drawback. Therefore, in order to improve its processability, while maintaining the same excellent characteristics inherent in PI, PI material in an organic solvent to increase the solubility and reduce its rigidity is an important research topic PI. Derived from a polyimide resin system capping group containing the imide resin as a polyimide high temperature, resistance to heat, radiation and a variety of excellent properties, but also are easy processability, can be in many aspects advanced to meet the requirements of the resin matrix composites become a research hotspot. Based on the above, this paper combines the characteristics of Jiangxi rich in forest resources, the introduction of the polyimide camphor, rosin derivatives such as capping agents, they are joined by a certain percentage to the dianhydride and diamine, synthetic polyimide oligomers. The capping agent and a synthetic oligomer of IR and NMR confirmed the synthesis of oligomer and thermal performance testing. Thermal performance testing results are as follows: camphor single anhydride capping agent polyimide oligomer product of a 5% weight loss was 380 ℃, 412 ℃ polyimide imide ring cleavage, 600 ℃ so for the polyimide lysis. Furan-maleic anhydride capped polyimide oligomer weight loss of 5% 378.8 ℃. Products were at 430 ℃ and 600 ℃ near the two endothermic peaks, corresponding to the thermal cracking of an alicyclic structure and the thermal cracking of polyimide endothermic peak. Dipentene maleic anhydride capped single-chain oligomer product of the number of 1 5% weight loss was 218 ℃ and 198 ℃, and 50% weight loss temperature was 664 ℃ and 639 ℃. Maleopimaric capped oligomer fragrant 5% weight loss temperature was 340 ℃, 303 ℃, 278 ℃, 50% of weight loss temperatures were 442 ℃, 438 ℃, 483 ℃, also shows a higher oligomers The glass transition temperature Tg of PI-1 which reach 310 ℃. This topic combines the characteristics of Jiangxi rich in forest resources, the introduction of polyimide oligomers camphor, rosin and other renewable forest resources, their derivatives for the preparation of polyimide oligomers capping agent These derivatives contain an alicyclic structure, they are introduced into a polyimide, it is necessary to improve the processing properties of polyimide, and can achieve rosin, high values ??of conversion of camphor.
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