Abstract
The thermal degradation of poly(methyl methacrylate) was studied using a system of thiols as initiators. Depolymerization is the dominant reaction in the thermal degradation of such polymers, according to thermal analysis. The degradation mechanism involves only main-chain scission. Three methods of degradation were applied to elucidate the thermal degradation behaviour. The activation energy for the degradation of PMMA-thiols is 170 kJ/mol, higher than that of PMMA-AIBN (60 kJ/mol), as measured by the Flynn method. According to Ozawa's method, the activation energy is 210 kJ/mol higher than that of an AIBN-initiated polymer (148-151 kJ/mol). By Kissinger's measurement method, this system has a frequency factor (∼ 1010) five orders of magnitude higher than the ordinary PMMA (∼ 105). The observed results are explained as a "blocking effect".
| Original language | English |
|---|---|
| Pages (from-to) | 81-88 |
| Number of pages | 8 |
| Journal | Polymer Degradation and Stability |
| Volume | 82 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2003 Sep 1 |
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All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Mechanics of Materials
- Polymers and Plastics
- Materials Chemistry
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The effect of end groups on the thermal degradation of poly(methyl methacrylate). / Hu, Yu Hsiang; Chen, Chuh-Yung.
In: Polymer Degradation and Stability, Vol. 82, No. 1, 01.09.2003, p. 81-88.Research output: Contribution to journal › Article
TY - JOUR
T1 - The effect of end groups on the thermal degradation of poly(methyl methacrylate)
AU - Hu, Yu Hsiang
AU - Chen, Chuh-Yung
PY - 2003/9/1
Y1 - 2003/9/1
N2 - The thermal degradation of poly(methyl methacrylate) was studied using a system of thiols as initiators. Depolymerization is the dominant reaction in the thermal degradation of such polymers, according to thermal analysis. The degradation mechanism involves only main-chain scission. Three methods of degradation were applied to elucidate the thermal degradation behaviour. The activation energy for the degradation of PMMA-thiols is 170 kJ/mol, higher than that of PMMA-AIBN (60 kJ/mol), as measured by the Flynn method. According to Ozawa's method, the activation energy is 210 kJ/mol higher than that of an AIBN-initiated polymer (148-151 kJ/mol). By Kissinger's measurement method, this system has a frequency factor (∼ 1010) five orders of magnitude higher than the ordinary PMMA (∼ 105). The observed results are explained as a "blocking effect".
AB - The thermal degradation of poly(methyl methacrylate) was studied using a system of thiols as initiators. Depolymerization is the dominant reaction in the thermal degradation of such polymers, according to thermal analysis. The degradation mechanism involves only main-chain scission. Three methods of degradation were applied to elucidate the thermal degradation behaviour. The activation energy for the degradation of PMMA-thiols is 170 kJ/mol, higher than that of PMMA-AIBN (60 kJ/mol), as measured by the Flynn method. According to Ozawa's method, the activation energy is 210 kJ/mol higher than that of an AIBN-initiated polymer (148-151 kJ/mol). By Kissinger's measurement method, this system has a frequency factor (∼ 1010) five orders of magnitude higher than the ordinary PMMA (∼ 105). The observed results are explained as a "blocking effect".
UR - http://www.scopus.com/inward/record.url?scp=0042010013&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0042010013&partnerID=8YFLogxK
U2 - 10.1016/S0141-3910(03)00165-4
DO - 10.1016/S0141-3910(03)00165-4
M3 - Article
AN - SCOPUS:0042010013
VL - 82
SP - 81
EP - 88
JO - Polymer Degradation and Stability
JF - Polymer Degradation and Stability
SN - 0141-3910
IS - 1
ER -