差示(shi)掃(sao)描量(liang)熱(re)儀是(shi)壹(yi)種測量(liang)參比端(duan)與樣(yang)品端(duan)的熱(re)流差與溫度參數關系的熱(re)分析儀(yi)器，主要應(ying)用於(yu)測(ce)量物(wu)質加(jia)熱或(huo)冷(leng)卻過(guo)程(cheng)中(zhong)的各種特征(zheng)參數：玻(bo)璃(li)化(hua)轉(zhuan)變(bian)溫(wen)度Tg、氧(yang)化(hua)誘導期(qi)OIT、熔(rong)融(rong)溫度(du)、結晶(jing)溫度、比熱(re)容(rong)及(ji)熱(re)焓等(deng)。

主要特點:

1.全(quan)新(xin)的爐(lu)體(ti)結構(gou)，確保解(jie)析(xi)度和分辨率(lv)的基(ji)線穩(wen)定(ding)性

2.數字式氣(qi)體(ti)質量(liang)流量計，控(kong)制(zhi)吹(chui)掃(sao)氣(qi)體(ti)流量(liang)，數據直接記(ji)錄在(zai)數據庫中(zhong)

3.儀器(qi)可采(cai)用雙向(xiang)控(kong)制(zhi)（主機控(kong)制(zhi)、軟件(jian)控(kong)制(zhi)），界面(mian)友(you)好(hao)，操(cao)作(zuo)簡便(bian)

技術(shu)參數:

什麽(me)是玻(bo)璃(li)化(hua)轉(zhuan)變(bian)溫(wen)度？

玻(bo)璃(li)化(hua)轉(zhuan)變(bian)是(shi)非(fei)晶(jing)態高分子材(cai)料（即非(fei)晶(jing)型聚合物(wu)）固(gu)有(you)的性(xing)質，是高(gao)分子運(yun)動形(xing)式轉變(bian)的宏觀(guan)體(ti)現，它(ta)直接影(ying)響(xiang)到(dao)材(cai)料的使(shi)用性能(neng)和工藝性能(neng)，因(yin)此(ci)長(chang)期(qi)以來(lai)它都(dou)是(shi)高(gao)分子物(wu)理研究(jiu)的主要內(nei)容(rong)。

絕(jue)大多數聚合物(wu)材料通常可處(chu)於(yu)以下(xia)三(san)種物(wu)理狀(zhuang)態(或(huo)稱(cheng)力學狀(zhuang)態):玻(bo)璃(li)態、高彈態（橡膠(jiao)態）和粘(zhan)流(liu)態。而(er)玻(bo)璃(li)化(hua)轉(zhuan)變(bian)則是高(gao)彈態和玻(bo)璃(li)態之(zhi)間(jian)的轉(zhuan)變，從分子結(jie)構(gou)上(shang)講(jiang)，玻(bo)璃(li)化(hua)轉(zhuan)變(bian)溫(wen)度是高聚物(wu)無(wu)定(ding)形(xing)部(bu)分從凍結(jie)狀(zhuang)態到(dao)解(jie)凍狀(zhuang)態的壹(yi)種松弛(chi)現(xian)象(xiang)。

以DSC為(wei)例，當溫度逐(zhu)漸升高，通(tong)過(guo)高(gao)分子聚合物(wu)的玻(bo)璃(li)化(hua)轉(zhuan)變(bian)溫(wen)度時，DSC曲(qu)線(xian)上(shang)的基(ji)線向吸(xi)熱(re)方向移動（見圖(tu)）。圖(tu)中(zhong)A點是開始偏離基(ji)線(xian)的點(dian)。將轉變(bian)前後的基(ji)線延長(chang)，兩線(xian)之(zhi)間(jian)的垂直(zhi)距離為(wei)階(jie)差ΔJ，在(zai)ΔJ/2 處可以找(zhao)到(dao)C點(dian)，從(cong)C點(dian)作(zuo)切線與前基線(xian)相(xiang)交(jiao)於(yu)B點(dian)，B點所對(dui)應(ying)的溫(wen)度值即(ji)為玻(bo)璃(li)化(hua)轉(zhuan)變(bian)溫(wen)度Tg。

常見的結(jie)晶性塑料有(you)：聚乙(yi)烯PE、聚丙(bing)烯PP、聚甲醛POM、聚酰胺(an)PA6、聚酰胺(an)PA66、PET、PBT等(deng)

非(fei)結(jie)晶塑料有(you)：聚碳、ABS、透(tou)苯、氯乙(yi)烯等(deng)（如(ru)塑料表(biao)殼(ke)、電視(shi)外(wai)殼(ke)等(deng)）

什麽(me)是氧(yang)化(hua)誘導期(qi)？

氧(yang)化(hua)誘導期(qi)（OIT）是測(ce)定(ding)試(shi)樣(yang)在高(gao)溫（200攝(she)氏(shi)度）氧(yang)氣(qi)條(tiao)件(jian)下(xia)開(kai)始發生(sheng)自(zi)動催(cui)化氧(yang)化(hua)反(fan)應(ying)的時(shi)間，是評(ping)價(jia)材料在成(cheng)型加工、儲(chu)存(cun)、焊(han)接和使用中(zhong)耐熱降(jiang)解(jie)能力的指(zhi)標(biao)。氧(yang)化(hua)誘導期(qi)（簡稱(cheng)OIT）方法(fa)是(shi)壹(yi)種采(cai)用差熱(re)分析法(fa)（DTA）以塑料分子鏈斷(duan)裂(lie)時的放(fang)熱反(fan)應(ying)為(wei)依據，測試(shi)塑料在高溫氧(yang)氣(qi)中(zhong)加速(su)老化程(cheng)度的方(fang)法(fa)。其(qi)原理是：將(jiang)塑料試樣(yang)與惰性(xing)參比物(wu)（如(ru)氧(yang)化(hua)鋁）置於(yu)差熱(re)分析儀(yi)中(zhong)，使其(qi)在壹(yi)定溫度(du)下(xia)用氧(yang)氣(qi)迅(xun)速(su)置(zhi)換試(shi)樣(yang)室內(nei)的惰性(xing)氣(qi)體(ti)（如(ru)氮(dan)氣(qi)）。測(ce)試(shi)由(you)於(yu)試(shi)樣(yang)氧(yang)化(hua)而(er)引起(qi)的DTA曲(qu)線(xian)（差熱(re)譜(pu)）的變(bian)化，並獲(huo)得氧(yang)化(hua)誘導期(qi)（時間(jian)）OIT（min)，以評(ping)定塑料的防熱老化性能。

和晟(sheng)差示(shi)掃(sao)描量(liang)熱(re)儀在(zai)部(bu)分高校(xiao)研究(jiu)所應(ying)用實例

部(bu)分使用我司(si)差示(shi)掃(sao)描量(liang)熱(re)儀客(ke)戶(hu)SCI論(lun)文(wen)

1、Natural compounds from Punica granatum peel as multiple stabilizers for polyethylene

2、Electro-Thermochromic Luminescent Fibers Controlled by Self-Crystallinity Phase Change for Advanced Smart Textiles

3、Carbon fiber/polyetherketoneketone composites. Part I: An ideal and uniform composition via solution‐based processing

4、Isolation and characterization of acid-soluble collagen and pepsin-soluble collagen from the skin of hybrid sturgeon

5、Physicochemical properties of soybean-based diacylglycerol before and after dry fractionation.

6、Water-in-oil emulsions enriched with alpha-linolenic acid in diacylglycerol form: Stability, formation mechanism and in vitro digestion analysis

7、Effects of treatment methods on the formation of resistant starch in purple sweet potato

8、High Lithium Ion Flux of Integrated Organic Electrode/Solid Polymer Electrolyte from In Situ Polymerization

9、Preheat Compression Molding for Polyetherketoneketone: Effect of Molecular Mobility

10、Characterization and experimental investigation of aluminum nitride-based composite phase change materials for battery thermal management

11、Experimental investigation of the flame retardant and form-stable composite phase change materials for a power battery thermal management system

12、Experimental investigation on immersion liquid cooled battery thermal management system with phase change epoxy sealant

13、Experimental Investigation on Thermal Management of Electric Vehicle Battery Module with Paraffin/Expanded Graphite Composite Phase Change Material