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热分析 PowerPoint PPT Presentation


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热分析. 概述. 热分析是 “ 在程序温度下,测量物质的物理性质随温度变化的一类技术 ” 。 —— 国际热分析协会( ICTA ). 几种主要的热分析法及其测定的物理化学参数. 几种主要的热分析法及其测定的物理化学参数. 差热分析( DTA )和差示扫描量热法( DSC ). 差热分析( Differential Thermal Analysis , DTA )是在程序控制温度下,测量物质和参比物的温度差随温度(或时间)变化的一种技术。. Δ T = T S - T R. 典型的 DTA 曲线.

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热分析

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  • ICTA




DTADSC

Differential Thermal AnalysisDTA


TTSTR


DTA


  • Differential Scanning CalorimetryDSC


DSC

  • DSC

    • T0

    • Perkin-ElmerDSC-2CDSC-7

  • DSC

    • TI

    • TA InstrumentsDSC 2910Modulated DSC

      NETZSCHDSC 204


DSC


DSC


mH=KA

m

H

AH

K


DTADSC

    • H2CO

    • N2ArHe





  • DSC -150600

    DTA 1300

  • 10/min


DTADSC


DTADSC


MgB3O3(OH)55H2ODTA



ATtBB

DSC

A

AB

BAABB

B


DSC

A

BAA

BA


8.314Jmol-1K-1

K

K

TsTs

Jmol-1


  • DTADSC


DSC






Unplasticized

Plasticized

Heat Flow

100

Temperature ()

220

Effect of Plasticizer on Melting of Nylon 11

TgTm

u

TgTm

u


ThermogravimetryTG



45

CuSO45H2O CuSO43H2O + 2H2O

CuSO43H2O CuSO4H2O + 2H2O

CuSO4H2O CuSO4 + H2O

100

212

TG

10.8mg10/min


DTG

Derivativ ThermogravimetryDTGTG


DTG

  • DTGTG

  • TGDTG


TG

12

1 2

123



  • 510/min


  • TGTG

  • 510/minTG


  • TG20mL/min

  • N2ArHe

    H2CO


T< T< TCO2


1-5mg2-20mg

CuSO45H2O

CuSO43H2O

CuSO4H2O

CuSO4

TG 5mg



  • : N2Air

  • 1500

  • 125/min10/min



Fe2O3 + 3H2 2Fe 3H2O


  • < 200

    < 300

    500800


750

CaMg[CO3]2 CaCO3 + MgCO3

MgCO3 MgO + CO2

CaCO3 CaO + CO2

750

860

CaCO376

CaMg[CO3]224


>>>>



1

2

TG/%

1-PVB

2-PVB

Temperature/

0.5

>

31



PPCHC

PPC

PPC-PCHC



Ozawa-Flynn-Wall (OFW)


-

  • FTIR



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