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1.        Crystallization of copolymers becomes gradually difficult with increasing R.
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2.        In the past few decades, biodegradable polymers have attracted increasing interest both from material researchers and industrial workers.
3.        In order to modify properties of PBS, extensive researches have been focused on the introduction of comonomers to alter its chemical structure.
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4.        As expected, thermal stability and mechanical properties of copolymers can be enhanced to some extent by the introduction of aromatic units.
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1. The difficulty of the copolymers crystallization increased with increasing radius.
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3. In order to optimize the properties of PBS, many researchers focused on the modifications of chain structures by inducing comonomers.
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