Page 59 - 《橡塑技术与装备》英文版2026年2期
P. 59
THEORY AND RESEARCH
2
Figure 6 Linear fitting curves of lnβ/T p versus 1/T p and lnβ versus 1/T p for the samples
3.4 Curing kinetic equation of the sample content of the initiator (benzoyl peroxide, BPO) increased, the
The relationship between curing temperature, time, and measured intrinsic viscosity value of the low molecular weight
degree of cure during the resin curing process is represented polyphenylene ether product decreased, and the molecular
using a phenomenological model method (equation (9)). weight decreased accordingly. This indicates that benzoyl
#
Sample 2 is selected as the calculation example. By peroxide plays a positive role in the redistribution reaction of
substituting the values of Ea, A, and n from the curing reaction polyphenylene ether during the reaction process. Therefore, the
of sample 2 into equation (9) based on the data of sample 2 , molecular weight of PPO-2OH can be controlled by adjusting
#
#
the curing kinetic equation (equation (10)) can be obtained. the content of the initiator, overcoming the melt viscosity and
dα fluidity issues of traditional polyphenylene ether.
n
Ae RT (1−α) (9)
E a
-
dt (3) In this paper, bisphenol A and benzoyl peroxide
dα
7
=7×10 e− 9.1797×10 (1−α) 0.92 (10) were selected as initiators to prepare low molecular weight
dt T
3
polyphenylene ether. The low molecular weight polyphenylene
4 Conclusion ether was mixed with epoxy resin (BNE-200) and modified
(1)The chemical structure of polyphenylene ether with 2-ethyl-4-methylimidazole as a crosslinking agent. Finally,
remains unchanged after the redistribution reaction, with only the kinetic equation of the curing process was calculated.
a change in molecular weight. However, the molecular weight The curing kinetics of polyphenylene ether modified epoxy
distribution of the product is uneven, and separation can be resin composites was systematically studied. The research
achieved by utilizing the different solubilities of high and low results of this paper have certain reference significance for the
molecular weight polyphenylene ether in different solvents. development of modified resins for high-frequency and high-
(2)The intrinsic viscosity of the product was measured speed copper clad laminates.
using an Ubbelohde viscometer, and it was found that as the
Vol.52，2026 ·15·
