If you quit your job, you are not entitled to unemployment compensation unless you quit for a good cause. Cause here means some incident or situation that would lead a reasonable employee in that situation to quit. In most cases, the employer has created an environment that has made employment difficult, such as permanently reducing the employee from full-time to part-time or providing unsafe working conditions.
Ordinarily, you must give your employer the opportunity to correct the intolerable condition. Likewise, in a unionized setting, you can seek the assistance of your union in correcting the condition.
However, you should still apply for benefits, because the state may agree that you had good cause to quit. In any event, you have nothing to lose by applying.
For more information, see our site's unemployment insurance eligibility page.