南京大学学报（自然科学版）
南京大學學報（自然科學版）
남경대학학보（자연과학판）
JOURNAL OF NANJING UNIVERSITY(NATURAL SCIENCES)
2010年
1期
41-46
,共6页
摩擦材料%环氧树脂%同化动力学%热分析
摩抆材料%環氧樹脂%同化動力學%熱分析
마찰재료%배양수지%동화동역학%열분석
friction material%epoxy resin%cure kinetics%thermal analysis
应用差示扫描量热(DSC)技术研究了超声电机驱动用的TGDDM/MTHPA环氧摩擦材料的固化动力学.对添加了聚四氟乙烯(PTFE)、碳纤维、石墨、MoS_2等填料的环氧摩擦材料固化体系在不同升温速率下得到的DSC曲线进行分析,运用Kissinger方程和Crane方程确定了体系反应级数和表观活化能,并将峰温T_p和结束温度T_e外推至升温速率为零,得到理论同化温度T_(cure)和固化后处理温度T_(treat).结果表明反应级数与二甲基苄胺(DMBA)用量无关,约为0.90;表观活化能随着DMBA量的增加先降后升,用量为1.0%时达到最小;T_(cure)、T_(treat)分别为130℃、153.8℃.按照上述优化配方和固化工艺制备的环氧摩擦材料装配行波超声电机(TRUMФ-60)机械性能良好,使用寿命可达8 000 h以上.
應用差示掃描量熱(DSC)技術研究瞭超聲電機驅動用的TGDDM/MTHPA環氧摩抆材料的固化動力學.對添加瞭聚四氟乙烯(PTFE)、碳纖維、石墨、MoS_2等填料的環氧摩抆材料固化體繫在不同升溫速率下得到的DSC麯線進行分析,運用Kissinger方程和Crane方程確定瞭體繫反應級數和錶觀活化能,併將峰溫T_p和結束溫度T_e外推至升溫速率為零,得到理論同化溫度T_(cure)和固化後處理溫度T_(treat).結果錶明反應級數與二甲基芐胺(DMBA)用量無關,約為0.90;錶觀活化能隨著DMBA量的增加先降後升,用量為1.0%時達到最小;T_(cure)、T_(treat)分彆為130℃、153.8℃.按照上述優化配方和固化工藝製備的環氧摩抆材料裝配行波超聲電機(TRUMФ-60)機械性能良好,使用壽命可達8 000 h以上.
응용차시소묘량열(DSC)기술연구료초성전궤구동용적TGDDM/MTHPA배양마찰재료적고화동역학.대첨가료취사불을희(PTFE)、탄섬유、석묵、MoS_2등전료적배양마찰재료고화체계재불동승온속솔하득도적DSC곡선진행분석,운용Kissinger방정화Crane방정학정료체계반응급수화표관활화능,병장봉온T_p화결속온도T_e외추지승온속솔위령,득도이론동화온도T_(cure)화고화후처리온도T_(treat).결과표명반응급수여이갑기변알(DMBA)용량무관,약위0.90;표관활화능수착DMBA량적증가선강후승,용량위1.0%시체도최소;T_(cure)、T_(treat)분별위130℃、153.8℃.안조상술우화배방화고화공예제비적배양마찰재료장배행파초성전궤(TRUMФ-60)궤계성능량호,사용수명가체8 000 h이상.
Epoxy resin matrix composite for friction material of ultrasonic motor driving was prepared by tetraglycidyl-4,4'-diaminodiphenylmethane (TGDDM)/methyl tetrahydrophthalic anhydride (MTHPA) filled with polytetrafluoroethylene(PTFE), carbon fibre, graphite, MoS_2 powder et al. The non-isothermal cure kinetic of this composite was studied by means of differential scanning calorimetry (DSC). The apparent activation energy and kinetic order of curing reaction were evaluated by Kissinger equation and Crane equation, and theoretic gelling temperature, curing temperature and heat-treating temperature were obtained by linearly extrapolating the curves of peak temperature and end temperature of cure reaction vs. beating rate (T_p-β and T_e-β). The reaction order n was calculated to be about 0.90independent of dimethyl benzyl amine(DMBA) dosage, and the apparent activation energy decreased firstly and then increased with the increase of the accelerant DMBA percentage and it showed a minimum in one percent DMBA dosage. The extrapolated curing temperature (T_(cure)) and heat treating temperature (T_(treat))are 130℃ and 153.8℃,respectively.The Mechanical properties of ultrasonic motor,TRUM φ-60,equipped with this epoxy composite friction material performed very well with lifetime longer than 8 000h.
