Kinetics for the growth of rigid amorphous fraction in cyclic olefin copolymers (COC)

P. P.J. Chu; W. J. Huang; F. C. Chang

doi:10.1016/S0032-3861(00)00586-3

Kinetics for the growth of rigid amorphous fraction in cyclic olefin copolymers (COC)

P. P.J. Chu, W. J. Huang, F. C. Chang

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

Both linear William-Watts (WW) and non-linear Narayanaswamy-William-Watts (NWW) stretch relaxation satisfactorily described the time dependent rigid amorphous phase growth kinetic. The model is tested upon the completely amorphous cyclic olefin copolymers (COC, polynorbornene/polyethylene copolymer), where a large T_g variation is detected with annealing. Increase of the rigid amorphous fraction as reflected in the increase of T_g, is attributed to the growth of short-range ordered phase due to the rigidity of the norbornene chain segment. The analysis shows the growth kinetic (represented by the retardation time, and the stretch exponent) that depends not only on the norbornene (NB) content but also on the NB microblock structure. The kinetics for the growth of the rigid amorphous domains follows a stretched exponential expression, similar to that given for polymer crystallization and physical aging.

Original language	English
Pages (from-to)	2185-2191
Number of pages	7
Journal	Polymer
Volume	42
Issue number	5
DOIs	https://doi.org/10.1016/S0032-3861(00)00586-3
State	Published - 2001

Keywords

Cyclic olefin copolymers
Densification
Kinetics

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10.1016/S0032-3861(00)00586-3

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title = "Kinetics for the growth of rigid amorphous fraction in cyclic olefin copolymers (COC)",

abstract = "Both linear William-Watts (WW) and non-linear Narayanaswamy-William-Watts (NWW) stretch relaxation satisfactorily described the time dependent rigid amorphous phase growth kinetic. The model is tested upon the completely amorphous cyclic olefin copolymers (COC, polynorbornene/polyethylene copolymer), where a large Tg variation is detected with annealing. Increase of the rigid amorphous fraction as reflected in the increase of Tg, is attributed to the growth of short-range ordered phase due to the rigidity of the norbornene chain segment. The analysis shows the growth kinetic (represented by the retardation time, and the stretch exponent) that depends not only on the norbornene (NB) content but also on the NB microblock structure. The kinetics for the growth of the rigid amorphous domains follows a stretched exponential expression, similar to that given for polymer crystallization and physical aging.",

keywords = "Cyclic olefin copolymers, Densification, Kinetics",

author = "Chu, {P. P.J.} and Huang, {W. J.} and Chang, {F. C.}",

note = "Funding Information: Financial support of this research was provided by the National Science Council of Republic of China under contract no. NSC-87-2113-M-008-004. ",

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T1 - Kinetics for the growth of rigid amorphous fraction in cyclic olefin copolymers (COC)

AU - Chu, P. P.J.

AU - Huang, W. J.

AU - Chang, F. C.

N1 - Funding Information: Financial support of this research was provided by the National Science Council of Republic of China under contract no. NSC-87-2113-M-008-004.

PY - 2001

Y1 - 2001

N2 - Both linear William-Watts (WW) and non-linear Narayanaswamy-William-Watts (NWW) stretch relaxation satisfactorily described the time dependent rigid amorphous phase growth kinetic. The model is tested upon the completely amorphous cyclic olefin copolymers (COC, polynorbornene/polyethylene copolymer), where a large Tg variation is detected with annealing. Increase of the rigid amorphous fraction as reflected in the increase of Tg, is attributed to the growth of short-range ordered phase due to the rigidity of the norbornene chain segment. The analysis shows the growth kinetic (represented by the retardation time, and the stretch exponent) that depends not only on the norbornene (NB) content but also on the NB microblock structure. The kinetics for the growth of the rigid amorphous domains follows a stretched exponential expression, similar to that given for polymer crystallization and physical aging.

AB - Both linear William-Watts (WW) and non-linear Narayanaswamy-William-Watts (NWW) stretch relaxation satisfactorily described the time dependent rigid amorphous phase growth kinetic. The model is tested upon the completely amorphous cyclic olefin copolymers (COC, polynorbornene/polyethylene copolymer), where a large Tg variation is detected with annealing. Increase of the rigid amorphous fraction as reflected in the increase of Tg, is attributed to the growth of short-range ordered phase due to the rigidity of the norbornene chain segment. The analysis shows the growth kinetic (represented by the retardation time, and the stretch exponent) that depends not only on the norbornene (NB) content but also on the NB microblock structure. The kinetics for the growth of the rigid amorphous domains follows a stretched exponential expression, similar to that given for polymer crystallization and physical aging.

KW - Cyclic olefin copolymers

KW - Densification

KW - Kinetics

UR - http://www.scopus.com/inward/record.url?scp=0034155301&partnerID=8YFLogxK

U2 - 10.1016/S0032-3861(00)00586-3

DO - 10.1016/S0032-3861(00)00586-3

M3 - 期刊論文

AN - SCOPUS:0034155301

SN - 0032-3861

VL - 42

SP - 2185

EP - 2191

JO - Polymer

JF - Polymer

IS - 5

ER -

Kinetics for the growth of rigid amorphous fraction in cyclic olefin copolymers (COC)

Abstract

Keywords

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